dspic33c digital power starter kit user’s guide · 2019. 5. 14. · dspic33c digital power...

2019 Microchip Technology Inc. DS50002867B

dsPIC33C Digital PowerStarter Kit

User’s Guide

DS50002867B-page 2 2019 Microchip Technology Inc.

Information contained in this publication regarding deviceapplications and the like is provided only for your convenienceand may be superseded by updates. It is your responsibility toensure that your application meets with your specifications.MICROCHIP MAKES NO REPRESENTATIONS ORWARRANTIES OF ANY KIND WHETHER EXPRESS ORIMPLIED, WRITTEN OR ORAL, STATUTORY OROTHERWISE, RELATED TO THE INFORMATION,INCLUDING BUT NOT LIMITED TO ITS CONDITION,QUALITY, PERFORMANCE, MERCHANTABILITY ORFITNESS FOR PURPOSE. Microchip disclaims all liabilityarising from this information and its use. Use of Microchipdevices in life support and/or safety applications is entirely atthe buyer’s risk, and the buyer agrees to defend, indemnify andhold harmless Microchip from any and all damages, claims,suits, or expenses resulting from such use. No licenses areconveyed, implicitly or otherwise, under any Microchipintellectual property rights unless otherwise stated.

Note the following details of the code protection feature on Microchip devices:

• Microchip products meet the specification contained in their particular Microchip Data Sheet.

• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions.

• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property.

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of ourproducts. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such actsallow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.

TrademarksThe Microchip name and logo, the Microchip logo, Adaptec, AnyRate, AVR, AVR logo, AVR Freaks, BesTime, BitCloud, chipKIT, chipKIT logo, CryptoMemory, CryptoRF, dsPIC, FlashFlex, flexPWR, HELDO, IGLOO, JukeBlox, KeeLoq, Kleer, LANCheck, LinkMD, maXStylus, maXTouch, MediaLB, megaAVR, Microsemi, Microsemi logo, MOST, MOST logo, MPLAB, OptoLyzer, PackeTime, PIC, picoPower, PICSTART, PIC32 logo, PolarFire, Prochip Designer, QTouch, SAM-BA, SenGenuity, SpyNIC, SST, SST Logo, SuperFlash, Symmetricom, SyncServer, Tachyon, TempTrackr, TimeSource, tinyAVR, UNI/O, Vectron, and XMEGA are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

APT, ClockWorks, The Embedded Control Solutions Company, EtherSynch, FlashTec, Hyper Speed Control, HyperLight Load, IntelliMOS, Libero, motorBench, mTouch, Powermite 3, Precision Edge, ProASIC, ProASIC Plus, ProASIC Plus logo, Quiet-Wire, SmartFusion, SyncWorld, Temux, TimeCesium, TimeHub, TimePictra, TimeProvider, Vite, WinPath, and ZL are registered trademarks of Microchip Technology Incorporated in the U.S.A.

Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any Capacitor, AnyIn, AnyOut, BlueSky, BodyCom, CodeGuard, CryptoAuthentication, CryptoAutomotive, CryptoCompanion, CryptoController, dsPICDEM, dsPICDEM.net, Dynamic Average Matching, DAM, ECAN, EtherGREEN, In-Circuit Serial Programming, ICSP, INICnet, Inter-Chip Connectivity, JitterBlocker, KleerNet, KleerNet logo, memBrain, Mindi, MiWi, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient Code Generation, PICDEM, PICDEM.net, PICkit, PICtail, PowerSmart, PureSilicon, QMatrix, REAL ICE, Ripple Blocker, SAM-ICE, Serial Quad I/O, SMART-I.S., SQI, SuperSwitcher, SuperSwitcher II, Total Endurance, TSHARC, USBCheck, VariSense, ViewSpan, WiperLock, Wireless DNA, and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

SQTP is a service mark of Microchip Technology Incorporated in the U.S.A.The Adaptec logo, Frequency on Demand, Silicon Storage Technology, and Symmcom are registered trademarks of Microchip Technology Inc. in other countries.GestIC is a registered trademark of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in other countries. All other trademarks mentioned herein are property of their respective companies.

© 2019, Microchip Technology Incorporated, All Rights Reserved.

ISBN: 978-1-5224-4726-9For information regarding Microchip’s Quality Management Systems, please visit www.microchip.com/quality.

www.microchip.com/quality

www.microchip.com/quality

dsPIC33C DIGITAL POWER
STARTER KIT USER’S GUIDE
Table of Contents

Preface ........................................................................................................................... 5Introduction............................................................................................................ 5Document Layout .................................................................................................. 5Conventions Used in this Guide ............................................................................ 6Recommended Reading........................................................................................ 7The Microchip Website.......................................................................................... 8Product Change Notification Service..................................................................... 8Customer Support ................................................................................................. 8Document Revision History ................................................................................... 8

Chapter 1. Introduction.................................................................................................. 91.1 Overview ........................................................................................................ 91.2 Kit Contents .................................................................................................... 91.3 Components ................................................................................................. 10

1.3.1 Top and Bottom View ................................................................................ 10

1.4 Powering the Board ...................................................................................... 121.5 Electrical Specifications ................................................................................ 131.6 Hardware Description ................................................................................... 14

1.6.1 Signal Configuration .................................................................................. 141.6.2 Board Connectors ..................................................................................... 151.6.3 Indicators and Human Interfaces .............................................................. 161.6.4 Test Points ................................................................................................ 16

1.7 Starter Kit Functionality and Features .......................................................... 171.7.1 Buck Converter .......................................................................................... 181.7.2 Boost Converter ........................................................................................ 191.7.3 Additional Features ................................................................................... 201.7.4 Programmer/Debugger .............................................................................. 21

1.8 dsPIC33C Digital Power Starter Kit System Diagram .................................. 21

Appendix A. Board Layout and Schematics.............................................................. 23Appendix B. Bill of Materials (BOM)........................................................................... 35

B.1 Bill of Materials ............................................................................................. 35

Appendix C. Demonstration Program Operation ...................................................... 41C.1 Program Demonstration ............................................................................... 41C.2 Code Demonstration .................................................................................... 43

C.2.1 System Initialization .................................................................................. 43C.2.2 Fault Check ............................................................................................... 43C.2.3 Soft Start ................................................................................................... 43C.2.4 2P2Z SW Control Compensator ............................................................... 43C.2.5 System While (1) Loop ............................................................................. 43

C.3 Other Code Examples ................................................................................. 43

Worldwide Sales and Service .................................................................................... 44

2019 Microchip Technology Inc. DS50002867B-page 3

dsPIC33C Digital Power Starter Kit User’s Guide

NOTES:


dsPIC33C DIGITAL POWER
STARTER KIT USER’S GUIDE
Preface

INTRODUCTION

This chapter contains general information that will be useful to know before using the dsPIC33C Digital Power Starter Kit. Items discussed in this chapter include:

• Document Layout• Conventions Used in this Guide• Recommended Reading• The Microchip Website• Product Change Notification Service• Customer Support• Document Revision History

DOCUMENT LAYOUTThis user’s guide provides an overview of the dsPIC33C Digital Power Starter Kit. The document is organized as follows:

• Chapter 1. “Introduction” – This chapter introduces the dsPIC33C Digital Power Starter Kit and provides a brief overview of its features.

• Appendix A. “Board Layout and Schematics” – This appendix provides diagrams of the hardware layout, as well as schematic diagrams for the dsPIC33C Digital Power Starter Kit.

• Appendix B. “Bill of Materials (BOM)” – This appendix presents the Bill of Materi-als for the dsPIC33C Digital Power Starter Kit.

• Appendix C. “Demonstration Program Operation” – This chapter describes the demonstration software that is preloaded on the device that accompanies the dsPIC33C Digital Power Starter Kit.

NOTICE TO CUSTOMERS

All documentation becomes dated, and this manual is no exception. Microchip tools and documentation are constantly evolving to meet customer needs, so some actual dialogs and/or tool descriptions may differ from those in this document. Please refer to our website (www.microchip.com) to obtain the latest documentation available.

Documents are identified with a “DS” number. This number is located on the bottom of each page, in front of the page number. The numbering convention for the DS number is “DSXXXXXXXXA”, where “XXXXXXXX” is the document number and “A” is the revision level of the document.

For the most up-to-date information on development tools, see the MPLAB® IDE online help. Select the Help menu, and then Topics to open a list of available online help files.


http://www.microchip.com


CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic characters Referenced books MPLAB® IDE User’s Guide

Emphasized text ...is the only compiler...

Initial caps A window the Output window

A dialog the Settings dialog

A menu selection select Enable Programmer

Quotes A field name in a window or dialog

“Save project before build”

Underlined, italic text with right angle bracket

A menu path File>Save

Bold characters A dialog button Click OK

A tab Click the Power tab

N‘Rnnnn A number in verilog format, where N is the total number of digits, R is the radix and n is a digit.

4‘b0010, 2‘hF1

Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>

Courier New font:

Plain Courier New Sample source code #define START

Filenames autoexec.bat

File paths c:\mcc18\h

Keywords _asm, _endasm, static

Command-line options -Opa+, -Opa-

Bit values 0, 1

Constants 0xFF, ‘A’

Italic Courier New A variable argument file.o, where file can be any valid filename

Square brackets [ ] Optional arguments mcc18 [options] file [options]

Curly brackets and pipe character: { | }

Choice of mutually exclusive arguments; an OR selection

errorlevel {0|1}

Ellipses... Replaces repeated text var_name [, var_name...]

Represents code supplied by user

void main (void){ ...}


Preface

RECOMMENDED READING

This user’s guide describes how to use the dsPIC33C Digital Power Starter Kit. Other useful document(s) are listed below. The following Microchip document(s) are recommended as supplemental reference resources.

MPLAB® C Compiler for PIC24 MCUs and dsPIC® DSCs User’s Guide (DS51284)

This comprehensive guide describes the usage, operation and features of Microchip’s MPLAB C compiler (formerly MPLAB C30) for use with 16-bit devices.

MPLAB® X IDE User’s Guide (DS50002027)

This document describes how to set up the MPLAB X IDE software and use it to create projects and program devices.

Readme Files

For the latest information on using the dsPIC33C Digital Power Starter Kit board, read the Readme.txt text file in the Readme subdirectory of the MPLAB X IDE installation directory from the dsPIC33C Digital Power Starter Kit code example. The Readme file contains updated information and known issues that may not be included in this user’s guide.

dsPIC33 ‘CK’ Data Sheet

Refer to these documents for detailed information on the dsPIC33 ‘CK’ SMPS Digital Signal Controllers (DSCs). Reference information found in these data sheets includes:

• Device memory maps

• Device pinout and packaging details

• Device electrical specifications

• List of peripherals included on the devices

dsPIC33/PIC24 Family Reference Manual Sections

Family Reference Manual (FRM) sections are available, which explain the operation of the dsPIC® DSC and PIC® MCU family architecture and peripheral modules. The specifics of each device family are discussed in the individual family’s device data sheet.

Microchip SMPS Resources

• AN1114, “Switch Mode Power Supply (SMPS) Topologies (Part I)” (DS01114)

• AN1207, “Switch Mode Power Supply (SMPS) Topologies (Part II)” (DS01207)

• TB062, “Frequently Asked Questions (FAQs) About dsPIC® DSC SMPS Devices” (DS93062)

To obtain any of these documents, visit the Microchip website at www.microchip.com.




THE MICROCHIP WEBSITE

Microchip provides online support via our website at www.microchip.com. This website is used as a means to make files and information easily available to customers. Accessible by using your favorite Internet browser, the website contains the following information:

• Product Support – Data sheets and errata, application notes and sample programs, design resources, user’s guides and hardware support documents, latest software releases and archived software

• General Technical Support – Frequently Asked Questions (FAQs), technical support requests, online discussion groups, Microchip consultant program member listing

• Business of Microchip – Product selector and ordering guides, latest Microchip press releases, listing of seminars and events; and listings of Microchip sales offices, distributors and factory representatives

PRODUCT CHANGE NOTIFICATION SERVICE

Microchip’s customer notification service helps keep customers current on Microchip products. Subscribers will receive e-mail notification whenever there are changes, updates, revisions or errata related to a specified product family or development tool of interest.

To register, access the Microchip website at www.microchip.com, click on Product Change Notification and follow the registration instructions.

CUSTOMER SUPPORT

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Corporate Application Engineer (CAE)

• Embedded Solutions Engineer (ESE)

• Field Application Engineer (FAE)

Customers should contact their distributor, representative or Embedded Solutions Engineer (ESE) for support. Local sales offices are also available to help customers. A listing of sales offices and locations is included in the back of this document.

Technical support is available through the website at:

http://www.microchip.com/support.

DOCUMENT REVISION HISTORY

Revision A (April 2019)

This is the initial release of this document.

Revision B (June 2019)

• Revised Section 1.4 “Powering the Board”.




http://www.microchip.com/support

dsPIC33C DIGITAL POWERSTARTER KIT USER’S GUIDE

Chapter 1. Introduction

This chapter introduces the dsPIC33C Digital Power Starter Kit and provides an overview of its features. The topics covered include:

• Overview

• Kit Contents

• Components

• Powering the Board

• Electrical Specifications

• Hardware Description

• Starter Kit Functionality and Features

• dsPIC33C Digital Power Starter Kit System Diagram

1.1 OVERVIEW

Modern power supplies are becoming smaller, more efficient, more flexible and less expensive. These desirable enhancements have come about as Digital Signal Controllers (DSCs) are incorporated into Switch Mode Power Supply (SMPS) designs. The board provided in the kit is intended to introduce and demonstrate the capabilities and features of the Microchip SMPS families of devices. The dsPIC33C Digital Power Starter Kit features an on-board dsPIC33CK256MP505 DSC device, SMPS power stages, resistive loads, LCD display, USB/UART bridge, and includes a programmer/debugger, which eliminates the need for any additional hardware.

The software for the demonstration application that is preprogrammed into the on-board dsPIC33C Digital Signal Controller (DSC) is available for download from the Microchip website at: http://www.microchip.com.

1.2 KIT CONTENTS

The dsPIC33C Digital Power Starter Kit contains the following:

• dsPIC33C Digital Power Starter Kit Board

• 9V Power Supply

• USB Cable

Note: Refer to the Readme file provided with the dsPIC33C Digital Power Starter Kit demonstration software for instructions on how to run the demonstration application. Refer to the Information Sheet that is provided with the starter kit package for additional resources and instructions on how to use the starter kit for programming and debugging application software.

Note: If you are missing any part of the kit, contact a Microchip sales office for assistance. A list of worldwide Microchip offices for sales and service is provided at the end of this document.



1.3 COMPONENTS

1.3.1 Top and Bottom View

The top and bottom assembly of the board are shown in Figure 1-1 and Figure 1-2. Table 1-1 and Table 1-2 provide a description of the components.

FIGURE 1-1: dsPIC33C DIGITAL POWER STARTER KIT (TOP VIEW)

TABLE 1-1: dsPIC33C DIGITAL POWER STARTER KIT COMPONENTS (TOP VIEW)

Number Description

1 2x16 Character LCD

2 Buck Converter Stage

3 Boost Converter Stage

4 Buck Load

5 Boost Load

6 Push Buttons for Controlling Resistive Loads

7 Reset Push Button

8 User Push Button

9 dsPIC33C Digital Signal Controller (DSC)

10 USB Connector

11 DC Power Input

12 Buck Converter Output

13 Programming Connection for dsPIC® DSC

14 Boost Converter Output

1

8

96

4

5

2

3

7

1011

12

14

13


Introduction

FIGURE 1-2: dsPIC33C DIGITAL POWER STARTER KIT (BOTTOM VIEW)

TABLE 1-2: dsPIC33C DIGITAL POWER STARTER KIT COMPONENTS (BOTTOM VIEW)

Number Description

1 PICkit™ On-Board (PKOB) Programmer/Debugger Circuit

2 PIC24F Auxiliary Microcontroller

3 Auxiliary Power Supply

4 USB/UART Hub and Bridge

5 Buck/Boost Load Control Switches

6 Temperature Sensor

6

5

1

2

4

3



1.4 POWERING THE BOARD

The dsPIC33C Digital Power Starter Kit is designed to be a self-contained power supply. On-board power stages are:

• One Asynchronous Boost Converter Power Stage

• One Synchronous Buck Converter Power Stage

To power the board, use connectors J1 and/or J6 as follows:

• +9V power connector (J1) supplies power to the dsPIC33C Digital Power Starter Kit, which includes: power stages and auxiliary power supply. Therefore, all build-ing blocks on the board are powered by applying voltage (> 6V) at this input. Once the voltage is provided to this connector, the power conversion starts immediately.

• USB connection jack (J6) supplies power to the auxiliary supply, and connection to the USB/UART bridge and PKOB (programmer/debugger), making it possible to communicate, program and debug the microcontrollers on the board without powering the Buck/Boost Converters.

Note: Buck and Boost Converters are both operated in Peak Current mode (default), but can also be reprogrammed to operate in Average Current mode or Voltage mode control; this requires minor firmware and/or hardware changes as different sensing source signals are used. Powering the board via a USB connector using a +5V only supply (without USB communication connections), such as wall chargers or USB power banks, is currently not supported. With a power supply with non-communication ports, the USB PICkit™ On-Board 4 (PKOB4) debugger/programmer will hold the target device in Reset.


Introduction

1.5 ELECTRICAL SPECIFICATIONS

TABLE 1-3: DC INPUT RATING (J1)

TABLE 1-4: BUCK CONVERTER ELECTRICAL SPECIFICATIONS

TABLE 1-5: BOOST CONVERTER ELECTRICAL SPECIFICATIONS

Parameter Minimum Typical Maximum Unit

Voltage 6.0 9 13.8 V

Current — 0.9 — A


Output Voltage (default programmed) — 3.3 — V

Output Voltage (programmable range) 1 — 3.8 V

Output Voltage Ripple — — 40 mV (pk-pk)

Output Current — 1 2 A

Load Regulation: VOUT = 3.3V, IOUT = 0.1 – 1.0A, VIN = 9V

— 13 — mV/A

Switching Frequency — 500 — kHz

Output Power — 3.3(1) 7.6(2) W

Note 1: Maximum power of on-board resistive loads should not exceed 3.3W.

2: Can be achieved only with an external load.


Output Voltage (default programmed) — 15 — V

Output Voltage (programmable range) 10(3) — 17.8 V

Output Voltage Ripple — 10 — mV (pk-pk)

Output Current — 0.2 0.4 A

Load Regulation:VOUT = 15V, IOUT = 0.03 – 0.2A, VIN = 9V

— 4 — mV/A

Switching Frequency — 500 — kHz

Output Power — 3(1) 6(2) W

Note 1: Maximum power of on-board resistive loads should not exceed 3W.

2: Can be achieved only with external load.

3: Input voltage must always be lower than the output voltage.



1.6 HARDWARE DESCRIPTION

Topics covered in this section include:

• Signal Configuration

• Board Connectors

• Indicators and Human Interfaces

• Test Points

1.6.1 Signal Configuration

Table 1-6 provides a full list of the dsPIC33C DSC connections and a brief functional description of the pins used in the dsPIC33C Digital Power Starter Kit.

TABLE 1-6: dsPIC33C CONFIGURATION DETAILS

dsPIC33C Digital Power Starter Kit Signal Label

Pin Number

Device Pin Name

Description/Function

RB14_PWM1H_BUCK 1 RB14 Buck Converter High Drive Signal

RB15_PWM1L_BUCK 2 RB15 Buck Converter Low Drive Signal

RC12_RP60_UART1_TX 3 RC12 USB/Serial Communication Output Pin

RC13_RP61_UART1_RX 4 RC13 USB/Serial Communication Input Pin

SW_RESET 5 MCLR Master Clear (Reset) Input

— 6 RD13 Not Used

RC0_AN12_VIN_MEAS 7 RC0 Analog – Input Voltage Sense

RA0_AN0 8 RA0 Analog – Buck Current Sense Transformer

RA1_ANA1 9 RA1 Analog – Buck Current Sense Shunt

— 10 RA2 Not Used

RA3_DAC_OUT 11 RA3 Analog – DAC Output

RA4_AN4_OA3_OUT 12 RA4 Analog – Internal Op Amp 3 Output

— 13 AVDD Analog Positive Supply

— 14 AVSS Analog Ground

RC1_OA3-_AN13_BUCK_VFB 15 RC1 Analog – Buck Voltage Feedback

RC2_OA3+ 16 RC2 Analog – Internal Op Amp 3 Positive Input, DAC_OUT, TP35

— 17 RC6 Not used

— 18 VDD Positive Supply for Peripheral Logic and I/O Pins

— 19 VSS Ground

— 20 RC3 Not Used

RB0_CLKI 21 RB0 Clock Input Pin

— 22 RB1 Not Used

RD10_AN18_BOOST_VFB 23 RD10 Analog – Boost Voltage Feedback

— 24 RC7 Not Used

RB2_AN1_OA2_OUT 25 RB2 Analog – Boost Current Sense Shunt

RB3_OA2- 26 RB3 Analog – Internal Op Amp 2 Negative Input

RB4_OA2+ 27 RB4 Analog – Internal Op Amp 2 Positive Input

LCD_Reset 28 RC8 LCD Active-Low Reset Signal

LCD_SEL 29 RC9 LCD Register Select Signal

LCD_CSB 30 RD8 LCD Chip Select Signal

— 31 VSS Ground


Introduction

1.6.2 Board Connectors

Table 1-7 describes the hardware connections available on the dsPIC33C Digital Power Starter Kit.

TABLE 1-7: HARDWARE CONNECTIONS


DSP_GPIO1 33 RB5 General Purpose I/O


RB7_AN2 35 RB7 Analog – Temperature Sensor Input

TARGET_RB8_PGD1 36 RB8 Device Programming/Debug Data Pin

TARGET_RB9_PGC1 37 RB9 Device Programming/Debug Clock Pin

LCD_DATA 38 RC4 LCD Data Signal

LCD_CLOCK 39 RC5 LCD Clock Signal

PIC24_UART_RX 40 RC10 I/O Controller Communication Pin

PIC24_UART_TX 41 RC11 I/O Controller Communication Pin

— 42 VSS Ground


SW_USER 44 RD1 User Push Button Input Pin

— 45 RB10 Not Used



RB13_PWM2L_BOOST 48 RB13 Boost Converter PWM Drive Signal

Label Hardware Element Description

J1 9V power supply.

J2 Terminal block for Buck Converter output; can be used for external load.

J3 Terminal block for Boost Converter output; can be used for external load.

J5 Unpopulated header for external programmer/debugger targeting the dsPIC® device.

J6 Micro-USB connector for communication and programming/debugging.

J7 Unpopulated header for external programmer/debugger targeting the PIC24F device.

TABLE 1-6: dsPIC33C CONFIGURATION DETAILS (CONTINUED)

dsPIC33C Digital Power Starter Kit Signal Label

Pin Number

Device Pin Name

Description/Function



1.6.3 Indicators and Human Interfaces

Table 1-8 describes the user interfaces available on the dsPIC33C Digital Power Starter Kit.

1.6.4 Test Points

Table 1-9 describes the test points that are available on the dsPIC33C Digital Power Starter Kit.

TABLE 1-8: INDICATORS AND HUMAN INTERFACES

Label Hardware Element Description

LCD1 User-Programmable LCD Display

LD1 Power-on Status LED, which indicates that the dsPIC33C Digital Power Starter Kit is powered by the 9V supply

LD2 Power-on Status LED, which indicates that the dsPIC33C Digital Power Starter Kit is powered by the USB supply

LD5 User-Programmable LED

LD10, LD11, LD12 Buck Converter Load LEDs

LD13, LD14, LD15 Boost Converter Load LEDs

LD16 Buck Converter Error

LD17 Boost Converter Error

LD18 Thermal Error or Warning

S1 dsPIC® Device Reset Push Button

S2 User Push Button

S10 Buck Load Control Push Button

S11 Boost Load Control Push Button

TABLE 1-9: TEST POINTS

Test Point Description

TP1 +9V DPSK Board Input Voltage (red)

TP10 Buck Low-Side MOSFET Gate (via)

TP11 Switching Node of the Buck Converter

TP12 Buck Output Node (red)

TP13 Ground

TP20 Boost MOSFET Gate

TP21 Switching Node of the Boost Converter

TP22 Boost Output Node (red)

TP23 Ground

TP3 Input Voltage into the 3.3V LDO

TP30 PWM1L Drive Signal Buck Low (yellow)

TP31 PWM1H Drive Signal Buck High (yellow)

TP32 PWM2L Drive Signal Boost (yellow)

TP33 Buck Converter Bode Test Point (red)

TP34 Buck Converter Bode Test Point (yellow)

TP35 OA3+/DAC Out

TP36 OA3-/Feedback Voltage Buck

TP37 Buck Current Sense (CS) Transformer

TP38 Buck CS Transformer after Low-Pass Filter

TP39 Buck CS Shunt Amplifier


Introduction

1.7 STARTER KIT FUNCTIONALITY AND FEATURESThe dsPIC33C Digital Power Starter Kit is a Switch Mode Power Supply (SMPS) board that consists of one independent DC/DC synchronous Buck Converter, one independent DC/DC Boost Converter, independent resistive loads, protection circuitry, USB/UART converter/bridge and on-board programmer/debugger circuitry. Both power stages are controlled by the dsPIC33C device. Loads and protection circuitry are controlled by an auxiliary PIC24F microcontroller. The PIC24F microcontroller and the dsPIC33C device communicate over UART, exchanging information, such as: load temperature, load status and protection status. These messages can be adapted or extended by the user.

TP4 Output Voltage of the 3.3V LDO

TP40 Buck CS Shunt Amplifier after Low-Pass Filter

TP41 Boost Converter Bode Test Point (red)

TP42 Boost Converter Bode Test Point (yellow)

TP43 Feedback Voltage Boost

TP44 Boost CS Low-Side Shunt

TP45 Boost CS High-Side Shunt

TP46 Boost CS High-Side Shunt after Low-Pass Filter

TP47 Input Voltage Sense

TP48 OA3 Output

TP49 Boost CS/OA2 Output

TP50 DSP_GPIO1

TP51 DSP_GPIO2

TP52 DSP_GPIO3

TP53 DSP_GPIO4

TP60 Buck OVP Comparator

TP61 Boost OVP Comparator

TP62 Buck OCP Comparator

TP63 Buck OCP Gate

TP64 Boost OCP

TP65 Boost OCP Gate

TP66 PROT_GPIO2

TP67 PROT_GPIO3

TP68 PROT_GPIO4

TP74 Buck Load 3

TP75 Boost Load 3

TP76 Temperature Sensor

TABLE 1-9: TEST POINTS (CONTINUED)

Test Point Description



1.7.1 Buck Converter

The Buck Converter stage is rated for a maximum of 7.6W. However, the maximum on-board configurable resistive load is 3.3W. The output voltage and output current should remain within their Safe Operating Area (SOA) to avoid protection circuitry tripping. The output voltage of the Buck Converter (Buck_Out) can be programmed from a 1V to 3.8V output, with a default programmed voltage of 3.3V. The hardware gain, 1k/(1k + 1k + 20), of the voltage feedback from the Buck_Out is provided by the resistor divider network, R62 and R63. Additionally, a 20 Ohm resistor, R60, for bode plot measurements is also in series with the feedback network. The hardware gain of the current feedback is provided by the Current Transformer (T1) with turns ratio (1:100) and burden resistor, R14. In total, this voltage will have a gain of 1V/Amp.

Figure 1-3 shows the load configuration. The load consists of three parallel resistor networks, with each network having its own equivalent resistance, as indicated in Figure 1-3. Therefore, each network will draw different current and dissipate different power at different output voltages. The board is supplied with pre-programmed 3.3V at the buck output with 3.3W load. The power dissipation causes 40°C T on the board.

FIGURE 1-3: BUCK CONVERTER – ON-BOARD RESISTIVE LOAD CONFIGURATION OPTION

Note: With current firmware supported by the auxiliary PIC24F microcontroller, the following options are possible to operate the loads: 0% (no load), 10%, 50%, 100% load (1A max). Press the push button, “Buck Load” (No. 6 in Figure 1-1), shortly to increase the load. In addition, the LEDs (LD10, 11 and 12) will turn on to signalize the load status. Once 100% is reached, pushing the button again will result in jumping to 0%; that is, turning off the load. All LEDs will be off and the process can start from the beginning.The load step generator is working at 100 Hz and 50% duty cycle. The supported load step schema is:

10% → 50%50% → 100%10% → 100%

Press and hold push button, “Buck Load”, for two seconds in order to change from Static Load to Load Step mode and vice versa.

Buck_Out

Load 1 Load 2 Load 3

GND GND GND

6.65R500 mA at 3V3

8.25R400 mA at 3V3

33R100 mA at 3V3


Introduction

1.7.2 Boost Converter

The Boost Converter stage is rated for a maximum power of 6W. However, the maximum on-board configurable resistive load is 3W. The output voltage and output current should remain within the Boost Converter Safe Operating Area (SOA) to avoid damage to the board. The output voltage of the Boost Converter (Boost_Out) can be pro-grammed from a 10V to 17.8V output, with a default programmed voltage of 15V. The hardware gain, 1k/(1k + 6.98k + 20), of the voltage feedback from the Boost_Out is provided by the resistor divider network of R72 and R73. Additionally, a 20 Ohm resistor, R71, for bode plot measurements is also in series with the feedback network. The hardware gain of the current feedback is provided by the current sense resistors, R34 and R35, and an internal op amp gain of four. In total, this voltage will have an offset voltage of 1V and a gain of 1V/A.

Figure 1-4 shows load configuration. The load consists of three parallel resistor networks with each network having its own equivalent resistance, as indicated in Figure 1-4. Therefore, each network will draw different current and dissipate different power at different output voltages. The board is supplied with pre-programed 15V at the boost output, with 3W load. The power dissipation causes 40°C T on the board.

FIGURE 1-4: BOOST CONVERTER – ON-BOARD RESISTIVE LOAD CONFIGURATION OPTION

Note: With current firmware, supported by the auxiliary PIC24F microcontroller, the following options are possible to operate the loads: 0% (no load), 15%, 50%, 100% load (200 mA max). Press the push button, “Boost Load” (No. 6 in Figure 1-1), shortly to increase the load. In addition, the LEDs (LD13, 14 and 15) will turn on to signalize the load status. Once 100% is reached, pushing the button again will result in jumping to 0%, that is, turning off the load. All LEDs will be off and the process can start from the beginning. The load step generator is working at 100 Hz and 50% duty cycle. The supported load step schema is:

15% → 50%50% → 100%15% → 100%

Press and hold push button, “Boost Load”, for two seconds in order to change from Static Load to Load Step mode and vice versa.

Boost_Out

Load 1 Load 2 Load 3

GND GND GND

150R100 mA at 15V

215R70 mA at 15V

499R30 mA at 15V



1.7.3 Additional Features

• On-Board Temperature Sensor: Located in the area of the resistive loads; this enables the user to program a temperature protection limit and a high-temperature fail-safe shutdown. Temperature threshold levels are as follows:

- 65°C: Warning; LD18 (overheat) is permanently on

- 75°C: LD18 (overheat) is blinkingPlease note that under this condition, the loads will permanently be switched off until the board temperature drops to the Safe Operating Area of < 65°C.

• Input Voltage Sense: Used to monitor the rail and detect under/overvoltage conditions.

• Input Voltage LED Indicators:

- LD1: USB voltage indicator

- LD2: AUX bias voltage indicator

• Load Indication LEDs:

- LD (10,11,12): Buck Converter loads

- LD (13,14,15): Boost Converter loads

• Error Indication LEDs:

- LD 16: Buck Converter error

- LD 17: Boost Converter error

• On-Board Protection Circuitry is permanently monitoring currents and voltages in the system. Trip levels are adjusted as follow:

- 3 APEAK Buck Converter input current

- 4V Buck Converter output voltage

- 1.6A Boost Converter input current

- 18V Boost Converter output voltage

• LD18: Thermal Error

• Reset Push Button: Press and release this button for the dsPIC device to go though a Reset routine.

• User Push Button: Press this button to change the information page on the LCD.

• On-Board LCD 2x16 Character Display: Shows different system relevant data, such as voltages, currents, temperature, internal load setting and converter status (enabled/disabled). Press push button, “USER” (No. 8 in Figure 1-1), to jump from one information page to another page.

Note: Taking into account the physical dimensions, the ambient temperature, the power dissipation and the protection threshold of the board, there are two possible combinations:

1. Single power stage running at full power, 3.3W maximum.2. Both power stages running at 50% load.

Running both stages at 100% load would mean 6.3W power dissipation. This will drive the board to an overheat condition after a short period of time (within several minutes).

Note: Once the signal exceeds the threshold level, the protection circuitry will latch this information and disable the related gate driver. The power flow will stop and the related LED will blink, indicating that a latched Fault occurred. The auxiliary microcontroller will reset this status every second after the Fault event and the related LED will be back to an OFF state.


Introduction

1.7.4 Programmer/Debugger

The dsPIC33C Digital Power Starter Kit includes an on-board programmer/debugger circuit that provides connectivity over USB. This circuit is hard-wired to the dsPIC® DSC device to provide ICSP™ debugging/programming capability.

TABLE 1-10: PROGRAMMER/DEBUGGER COMPONENTS

1.8 dsPIC33C DIGITAL POWER STARTER KIT SYSTEM DIAGRAM

The dsPIC33C Digital Power Starter Kit provides Closed-Loop Peak Current mode control using a 2-Pole, 2-Zero (2P2Z) compensator, implemented in software, to main-tain the desired load step response and converter stability criteria. The dsPIC DSC device provides the necessary memory and peripherals for ADC conversion, PWM generation, analog comparison and general purpose I/Os, preventing the need to perform these functions in external circuitry.

dsPIC DSC SMPS devices are specifically designed to provide low-cost and efficient control for a wide range of power supply topologies. The specialized peripherals facilitate closed-loop feedback control of Switch Mode Power Supplies, providing communication for remote monitoring and supervisory control.

The dsPIC33C family of devices provides the following features:

• Integrated program and data memory on a single chip

• Ultra-fast interrupt response time with interrupt priority logic

• High-speed ADC with multiple Sample-and-Hold (S&H) circuits

• High-resolution PWM generators, specially designed to support different power topologies

• High-speed analog comparators for control loop implementation and system protection

• On-chip system communications (I2C/SPI/UART)

• Internal PDM DAC slope compensation

• On-chip Fast RC (FRC) oscillator for lower system cost

Component Label Description

On-Board Programmer/Debugger

N/A Controls the programming/debugging operations of the target dsPIC33C DSC.

Programmer/Debugger USB Connector

J6 Provides power to the programmer/debugger, and bidirectional communication between the host PC and the dsPIC33C Digital Power Starter Kit. For UART communication, a USB/UART hub and bridge are on board, hard-wired to the dsPIC33C device. It is possible to communicate over a UART channel to the PIC24F through the dsPIC33C DSC.

Note: Buck and Boost Converters are both operated in Peak Current mode (default), but can also be reprogrammed to operate in Average Current or Voltage mode control; this requires minor firmware and/or hardware changes if different sensing source signals are used.



Figure 1-5 illustrates a high-level block diagram of the dsPIC33C Digital Power Starter Kit.

FIGURE 1-5: dsPIC33C DIGITAL POWER STARTER KIT SYSTEM DIAGRAM

VINIsns

Buck_Out

C

LDriverPWM1 I/O

FLT_TRIG

CMP1A

Isns

PWM Generator 1

PDM DAC(Ramp Generator)

DAC1DATHBuck VoltageCompensatorREF

FB

ADC CH13

ADC_TRIGRC1_AN13ADCBUF13

ADCBUF12ADC CH12

VIN

Display

VIN

Boost_Out

C

LDriverRB13_PWM2L

PWM2 I/O

FLT_TRIG

PWM Generator 2

CMP2D

PDM DAC(Ramp Generator)

Boost VoltageCompensator

REFFB

DAC2DATH

ADCBUF18

OA2

ADC CH18

ADC_TRIG

RD10_AN18

RB3_OA2-

RB4_OA2+

Initializers

Fault Handlers

Soft Start

Feed Forward

Control State Machine

Hardware Related Building BlocksSoftware Related Building Blocks

dsPIC33C

PIC24F

UART

UART

State Machine Comparators

Load X

LEDs

Temp.SensorButtons

Comparators

Buck_Out

Buck Isns

Boost_Out

Boost Isns

TempSensor

Load x

Load x

Buck_Out

Load x

Load x

Boost_Out

LED LED

...

Buck Load Boost Load

f(x1...xn)

x1

x2

u1

RB2_CMP2D_OA2OUT

RC0_AN12

RA0_CMP1A

RB14_PWM1H

RB15_PWM1L



Appendix A. Board Layout and Schematics

This appendix contains the board layouts and the schematics for the dsPIC33C Digital Power Starter Kit.

FIGURE A-1: dsPIC33C DIGITAL POWER STARTER KIT LAYOUT (TOP)



FIGURE A-2: dsPIC33C DIGITAL POWER STARTER KIT LAYOUT (BOTTOM)


Board Layout and Schematics

FIGURE A-3: BLOCK DIAGRAM

SW_R

ESET

Pow

er In

put

PushButtons

T_IC

SP

LCD_Control

SW_R

ESET

dsPI

C_U

AR

T

PIC24_UART

Boo

st_C

ontro

l

Buc

k_C

ontro

l

Temp_Sensor

Cont

rol

BU

CK

_OU

T

Buc

k_C

ontro

lB

uck_

Prot

ectio

n

Buck

Con

verte

r

Boo

st_C

ontro

lB

oost_

Prot

ectio

n

BO

OST

_OU

T

Boos

t Con

verte

r

LCD_Control

PushButtons

Use

r Int

erfa

ce

T_IC

SP

USB_PKOB

PIC

kit™

On-

Boa

rd

USB

ICS

P™

ICSP

DC

In

Boo

st O

ut

Buck

Out

+VD

D

dsPI

C_U

AR

T

USB_PKOB

Com

mun

icat

ion

+VD

D

+5V

+3.3

V

+5V

Buc

k_Lo

ad_C

trl

Boo

st_Lo

ad_C

trl

Boo

st_Pr

otec

tion

PIC24_UART

Temp_Sensor

Buc

k_Pr

otec

tion

+VD

D

+5V

+3.3

V

Prot

ectio

n an

d O

n-B

oard

Loa

dCo

ntro

l

+5V_

USB

+5V_

USB

+3.3

V

+3.3

V

DC

In

+3.3

V+5

V

Vin

_Sen

LDO

Buck

+5V_

USB

Inpu

t Vol

tage

: 6.0

to 1

3.8

VD

C

Boo

st_Lo

ad_C

trl

Tem

p_Se

nsor

Buc

k_Lo

ad_C

trl

BO

OST

_OU

T

BU

CK

_OU

T

On-

Boa

rd L

oad

+3.3

V_U

SB



FIGURE A-4: POWER INPUT

Designedwith

Alti

um. c

om

+5V

_USB

GN

D_D

GN

D_U

+3.3

V

GN

D_D

3.3k

0603

1%R3 GR

EEN

0603

LD1

SW_R

ESET

10 μ

F10

V06

03

C9

10 μ

F10

V06

03

C10

B052

0WS

D4

SW_R

ESET

B052

0WS

D3

GN

D_P

+VD

DTP

LO

OP

Red

TP1

GN

D_P

To C

ontro

l

GN

D_P

GN

D_P

Pow

er In

put

+3.3

V LD

O+5

V SM

PS

Gro

und

Con

nect

ions

10 μ

F50

V12

10

C5

500

mA

_max

BO

OST

1

GN

D

2

VFB

3EN

4

SW6

VIN

5

MCP1

6331

U1

BAT4

1

D2

SS11

0D

1

15 μ

H

L2

+5V

1% 10k

0603

R2

52.3k

0603

1%R1

GN

D_U3.3

k06

031%R

4 GREE

N06

03

LD2

10 μ

F10

V06

03

C7

10 μ

F10

V06

03

C8

0.1 μ

F50

V06

03

C6

10 μ

F50

V12

10

C1

+VD

D to

Buc

k an

d B

oost

Con

verte

rs

+VD

D

+3.3

V to

Con

trol a

nd O

ther

Circ

uitry

+5V

to th

e M

OS

FET

Driv

ers

and

the

Pro

tect

ion

Circ

uitry

Inpu

t vol

tage

: 6..

to 1

3.8

VDC

Cur

rent

: 1A

max

.

DC

In

DC

InU

SB P

ower

231

POW

ER 2

mm

J1

VIN

2

SHD

N1

GN

D3

PWR

GD

5

VO

UT

4

EP6

MCP1

755/3

.3VSO

T-22

3

U2

Via 1

.6x1

TP3

Via 1

.6x1

TP4

1.4uH

SDR0

403-

1R4M

L

L1

2.2R

1206

1%R

7

100 μ

F25

VAL

-D6.3

C2

GN

D_D

0R 1206

R6

GN

D_D

GN

D_D

GN

D_D

GN

D_D

GN

D_D

GN

D_D

GN

D_U

0R 1206

R8

+3.3

V+3

.3V

_USB

600R

0603

1AFB4

+3.3

V_U

SB to

USB

Circ

uitry



FIGURE A-5: dsPIC33C DIGITAL POWER STARTER KIT SCHEMATIC REV. 3.0(BUCK CONVERTER)

GN

D_P

4.7 μ

F16

V06

03

C20

0.1 μ

F50

V06

03

C21

+5V

1% 3.3k

0603

R11

1% 3.3k

0603

R12

0.1 μ

F50

V06

03

C22

GN

D_P

GN

D_A

+VD

D

GN

D_P

1% 10k

0603

R17

GN

D_P

1% 10k

0603

R19

GN

D_P

1 μF

16V

0603

C28TP

LO

OP

Red

TP12

GN

D_P

12 TERM

INAL

1x2

J2B

uck

Out

BUCK

_OUT

10R

0603

1%R10

Yes

R13

VIN

= 6

V...1

3.8V

VO

UT

= 3.

3V (4

V O

VP

trip

poin

t)IO

UT

= 1

AM

AX

(on-

boar

d lo

ad),

2 A

MA

X (t

otal

load

)P O

UT

= 3.

3 W

MA

X (o

n-bo

ard

load

), 6.

6 W

MA

X (t

otal

load

)F S

W =

250

kH

z...5

00 k

Hz

Dut

y C

ycle

Max

= 9

6%F C

= 2

0 kH

z (e

stim

ated

in P

eak

Cur

rent

mod

e)Lo

ad S

tep

Res

pons

e =

100

mV

P (50

% lo

ad st

ep)

VO

UT_

rippl

e =

20 m

VPP

DCM

-CC

M B

orde

r - 50

0 mW

VP

Osc

illat

ion

to b

e 1

Hz

BUCK

_CS_

TRA

PWM

1HPW

M1L

BU

CK

_VFB

BU

CK

_CS_

TRA

BU

CK

_CS_

AM

P

Buc

k_C

ontro

l

Buc

k_C

ontro

l

BUCK

_OUT

GN

D_P

MCP8

7130

T-U/

MF4

1,2,3

5,6,7,

8 Q10

MCP8

7130

T-U/

MF4

1,2,3

5,6,7,

8 Q11

4 312

CST7

030-

100L

BTR

1

RB15

_PW

M1L_

BUCK

RB14

_PW

M1H_

BUCK

100 μ

F25

VL1

0W10

H10

C23

Buc

k_Pr

otec

tion

BU

CK

_VFB

BU

CK

_CS_

TRA

Buc

k_O

CP

Buc

k_O

VP

Buc

k_Pr

otec

tion

BUCK

_OUT

GN

D_P

1500

pF50

V06

03C0

G

C25

GN

D_P10

μF

50V

1210

C24

BAT4

1

D10

10R

0603

1%

DNP

R23

10R

0603

1%

DNP

R22

BAT4

1

DNP

D11

BAT4

1

DNP

D12

BUCK

_CS_

AMP

PHA

SE1

PWM

_HI

2

PWM

_LO

3

GN

D4

LOW

DR

5

VC

C6

BO

OT

7

HIG

HD

R8

EP9

MCP1

4700

U20

100 μ

F10

VTA

NT-W

C27

BU

CK

_OU

T

34

74LV

C2GU

04

U22

BGND 2VCC5

74LV

C2GU

04U

22C

1

2 3 4 574

HC40

02

U23

A

13

9 10 11 1274

HC40

02

U23

B

GND 7VCC14

74HC

4002

U23

C

GN

D_D

GN

D_D

+3.3

V+3

.3V

BUCK

_OCP

_GAT

EBU

CK_O

VP_C

MP

10 μ

HXA

L606

0-10

3MEB

L3

GN

D_A10

R06

031%

DNP

R24

+3.3

V

3.3k

0603

DNP

1%R25

3.3k

0603

DNP

1%R26

BUCK

_CS_

AMP

Via 1

.6x1

TP10

Via 1

.6x1

TP11

VO

UT

1

GN

D2

VIP 3

VIM 4

VR

EF5

VD

D6

VO

UT

GN

D

VIP

VIM

VR

EF

VD

D

MCP6

C02-

020

DNP

U21

16

74LV

C2GU

04

U22

A

100R

0603

1%R14

4.7k

0603

1%R15

1R 0603

1%R16

1R 0603

1%R18

5.6R

0603

1%R20

1500

pF50

V06

03DN

PC

29

0.03R

1206

1%R21

680 p

F25

V06

03

C33

0.1 μ

F50

V06

03

C31

0.1 μ

F50

V06

03

C32

Via 1

.6x1

TP13

GN

D_P

BUCK

_CS_

TRA

20k

0603

1%

DNP

R27

GN

D_A

1 μF

16V

0603 DN

P

C30



FIGURE A-6: dsPIC33C DIGITAL POWER STARTER KIT SCHEMATIC REV. 3.0 (BOOST CONVERTER)

+VD

D

0.1 μ

F50

V06

03

C41

3.3k

0603

1%R31

1% 10k

0603

R33

GN

D_P

GN

D_P

10R

0603

1%R32

GN

D_P

VIN

= 6

V...

13.8

VV

OU

T =

15V

(20V

OV

P tri

p po

int)

I OU

T = 2

00 m

A m

ax (o

n-bo

ard

load

), 40

0 m

A m

ax (t

otal

load

)PO

UT

= 3

WM

AX

(on-

boar

d lo

ad),

6 W

MA

X (t

otal

load

)F S

W =

250

kH

z...5

00 k

Hz

Dut

y C

ycle

max

= 9

6%FC

= 2

kH

z (e

stim

ated

in A

vera

ge C

urre

nt m

ode)

Load

Ste

p R

espo

nse

= 50

0 m

Vp

(50%

load

step

)V

OU

T_rip

ple

= 50

mV

PPD

CM-C

CM b

orde

r = 5

00 m

W

GN

D_P

TP L

OO

P R

edTP

22

GN

D_P

1 2 TERM

INAL

1x2

J3B

oost

Out

GN

D_P

BOOS

T_OU

TMC

P871

30T-

U/MF

4

1,2,3

5,6,7,

8 Q20

+t29

2033

V2.5

A

PTC

1 BOOS

T_CS

_RES

BOOS

T_OU

T

PWM

2L

BO

OST

_VFB

BO

OST

_CS_

AM

PB

OO

ST_C

S_R

ES

Boo

st_C

ontro

l

Boo

st_C

ontro

lG

ND

_P1 μF

16V

0603

C42

+5V 10

R06

031%R

30

GN

D_P

10 μ

F50

V12

10

C46

100 μ

F25

VL1

0W10

H10

C44

10 μ

F50

V12

10

C40

Boo

st_Pr

otec

tion

Boo

st_G

ate_

EN

BO

OST

_VFB

BO

OST

_CS

Boo

st_Pr

otec

tion

BOOS

T_OU

T

BOOS

T_CS

_RES

33 μ

H74

4771

4330

L4

10R

0603

1%

DNP

R38

10R

0603

1%

DNP

R39

BAT4

1

DNP

D21

BAT4

1

DNP

D22

GN

D_A10

R06

031%

DNP

R40

+3.3

V

BOOS

T_CS

_AMP

BOOS

T_CS

_AMP

RB13

_PW

M2L_

BOOS

T

4.7 μ

F25

V08

05

C45

GN

D_P

GN

D_P

BO

OST

_OU

T

HSM5

60

D20

3.3k

0603

DNP

1%R41

330R

0603

DNP

1%R42

BOOS

T_CS

_AMP

GN

D_P

Via 1

.6x1

TP20

Via 1

.6x1

TP21

VO

UT

1

GN

D2

VIP 3

VIM 4

VR

EF5

VD

D6

VO

UT

GN

D

VIP

VIM

VR

EF

VD

D

MCP6

C02-

020

DNP

U31

0.082

R12

061%R

37

1500

pF50

V06

03DN

PC

48

0.5R

1206

1%R34

0.5R

1206

1%R35

IN3

AG

ND

2

GN

D5

OU

T6

VD

D1

EN4

MCP1

4A01

52

U30

BOOS

T_GA

TE

SMCJ

15CA

DNP

D23

8.25R

1206

1%R36

680 p

F25

V06

03

C43

1.4 μ

HSD

R040

3-1R

4ML

L5

20k

0603

1%R43

GN

D_A

Via 1

.6x1

TP23

GN

D_P

GN

D_P

0.1 μ

F50

V06

03

C47

1 μF

16V

0603 DN

P

C49



FIGURE A-7: dsPIC33C DIGITAL POWER STARTER KIT SCHEMATIC REV. 3.0

Designedwith

Alti

um.c

om

Push

But

tons

T_IC

SP

LCD

_Con

trol +3

.3V

Pro

gram

ing

Inte

rface

GN

D_D

TARG

ET_R

B8_P

GD1

RC13

_RP6

1_UA

RT1_

RX

RC12

_RP6

0_UA

RT1_

TX

SW_R

ESET

SW_R

ESET

dsPI

C_U

ART

dsPI

C_U

ART

_TX

dsPI

C_U

ART

_RX

dsPI

C_U

AR

T

1 2 3 4 5 6

HDR-

1.27 M

ale 1x

6

DNP

J5

DSP_

GPIO

1DS

P_GP

IO2

SW_U

SER

LCD

_SEL

LCD

_CSB

LCD

_DA

TALC

D_C

LOC

KLC

D_R

eset

LCD

_Con

trol

LCD_

DATA

LCD_

SEL

LCD_

CLOC

K

LCD_

CSB

LCD_

Rese

t

To U

ser I

nter

face

Add

ition

al T

est P

oint

s

To C

omm

unic

atio

ns

To B

uck

Con

verte

r

SW_R

ESET

SW1

SW2

SWIT

CH

TAR

GET

_RB

8_PG

D1

TAR

GET

_RB

9_PG

C1

TAR

GET

_MC

LR

T_IC

SP

TVPP

TARG

ET_R

B8_P

GD1

TARG

ET_R

B9_P

GC1

TVPP

1% 1k 0603

R62

GN

D_A

PWM

1HPW

M1L

BU

CK

_VFB

BU

CK

_CS_

TRA

BU

CK

_CS_

AM

P

Buc

k_C

ontro

l

Buc

k_C

ontro

l

+3.3

V BAT4

1D

31

To B

oost

Con

verte

r

BUCK

_OUT

RB15

_PW

M1L_

BUCK

RB14

_PW

M1H_

BUCK

3.3k

0603

1%R53

GN

D_D

0603

YesR61 06

03D

NP

C60

5600

pF06

0325

V

C61

RED

0603

LD5

1% 1k 0603

R63

1% 100R

0603

R64

BOOS

T_CS

_RES

BOOS

T_OU

T

PWM

2L

BO

OST

_VFB

BO

OST

_CS_

AM

PB

OO

ST_C

S_R

ES

Boo

st_C

ontro

l

Boo

st_C

ontro

lBO

OST_

CS_A

MP

RB13

_PW

M2L_

BOOS

T

BUCK

_CS_

TRA

BUCK

_CS_

AMP

Temp

_Sen

sor

Tem

p_Se

nsor

TP LO

OP Y

ellow

TP34

Via 1

.6x1

TP36

To P

ower

In

PIC2

4_UA

RT_T

X

PIC2

4_UA

RT_R

X

PIC

24_U

ART

PIC

24_U

ART

_RX

PIC

24_U

AR

T_TX

PIC

24_U

ART

To P

rote

ctio

n an

d O

n-B

oard

Loa

d C

ontro

l

DSP_

GPIO

3

DSP_

GPIO

4

TP LO

OP B

lack T

HTP

54

GN

D_A

RC1_

OA3-_

AN13

_BUC

K_VF

B

Via 1

.6x1

TP50

Via 1

.6x1

TP51

Via 1

.6x1

TP52

Via 1

.6x1

TP53

20R

0603

1%R60

GN

D_A

+VD

D+3

.3V BA

T41

D33

GN

D_A

560 p

F06

0350

V

C64

5600

pF06

0325

V

C56

1% 56R

0603

R67

1% 100R

0603

R56

1% 1k 0603

R55

6.98k

0603

1%R54

BUCK

_CS_

TRA

Via 1

.6x1

TP38

Via 1

.6x1

TP47

RC0_

AN12

_VIN

_MEA

S

0R 0603

R68

RA0_

AN0

0603

YesR66

0603

DN

P

C63

dsPI

C® D

SC In

tern

al O

A3

IN+

0603

DN

P

C62

1%10

0R06

03R

65

RC2_

OA3+

RA3_

DAC_

OUT

IN-

RA4_

AN4_

OA3_

OUT

Via 1

.6x1

TP35

GN

D_A

BUCK

_OUTTP

LO

OP

Red

TP33

Via 1

.6x1

TP39

Via 1

.6x1

TP37

Via 1

.6x1

TP40

20R

0603

1%R69

0R 0603DN

P

R70

RA1_

ANA1

BUCK

_CS_

AMP

TARG

ET_R

B9_P

GC1

GN

D_A

Buc

k V

olta

ge F

eedb

ack

Net

wor

k

Buc

k C

urre

nt F

eedb

ack

Net

wor

k

1%3k

0603

R79

1% 1k 0603

R77

GN

D_A

10 pF

50V

0603

C72

dsP

IC® In

tern

al O

A2

IN+

IN-

RB2_

AN1_

OA2_

OUT

RB3_

OA2-

GN

D_A1% 5.9

k06

03

R76

+3.3

V_A

BOOS

T_CS

_RES

0603

DNP

C71

560R

0603

1%R75

RB4_

OA2+

Via 1

.6x1

TP45

Via 1

.6x1

TP46

20R

0603

1%R78

0R06

03

DNP

R80

Via 1

.6x1

TP44

BOOS

T_CS

_AMP

Boo

st C

urre

nt F

eedb

ack

Net

wor

k

Inpu

t Vol

tage

Mea

sure

men

t

+3.3

V

GN

D_D

GN

D_D

GN

D_D

GN

D_D

GN

D_A

GN

D_A

+3.3

V_A

1 μF

16V

0603

C51

1 μF

16V

0603

C52

1 μF

16V

0603

C53

GN

D_D

+3.3

V

RB0_

CLKI

STB

1

GN

D2

OU

T3

VD

D4

8.000

MHz

DSC6

011J

I2A-0

08.00

00

Y1

RB15

_PW

M1L_

BUCK

RB14

_PW

M1H_

BUCK

RC0_

AN12

_VIN

_MEA

S

RB13

_PW

M2L_

BOOS

T

SW_U

SER

RB0_

CLKI

LCD_

DATA

LCD_

SEL

LCD_

CLOC

K

LCD_

CSB

LCD_

Rese

t

TVPP

330R

R51

SW_R

ESET

RD10

_AN1

8_BO

OST_

VFB

0.1 μ

F50

V06

03

C55

0.1 μ

F50

V06

03

C50

1% 100R

0603

R52

GN

D_A10

μF

10V

0603

C54

600R

0603

1A

FB1

+3.3

V

0R 0603

R50

GN

D_D

RB7_

AN2

RB

141

RB

152

RC

123

RC

134

MC

LR5

RD

136

RC

07

RA0

8

RA1

9

RA2

10

RA3

11

RA4

12

AV

DD

13

AV

ss14

RC

115

RC

216

RC

617

VD

D18

Vss

19

RC

320

RB

021

RB

122

RD

1023

RC

724

RB

225

RB

326

RB

427

RC

828

RC

929

RD

830

Vss

31

VD

D32

RB

533

RB

634

RB

735

RB

836

RB

937

RC

438

RC

539

RC

1040

RC

1141

Vss

42

VD

D43

RD

144

RB

1045

RB

1146

RB

1247

RB

1348

dsPI

C33C

K256

MP50

5 TQF

P-48

U40

PIC2

4_UA

RT_T

XPI

C24_

UART

_RX

RC13

_RP6

1_UA

RT1_

RXRC

12_R

P60_

UART

1_TX

RA3_

DAC_

OUT

RA4_

AN4_

OA3_

OUT

RB2_

AN1_

OA2_

OUT

RB4_

OA2+

RB3_

OA2-

RC1_

OA3-_

AN13

_BUC

K_VF

B

DSP_

GPIO

1DS

P_GP

IO2

DSP_

GPIO

3DS

P_GP

IO4

TARG

ET_R

B8_P

GD1

TARG

ET_R

B9_P

GC1

RC2_

OA3+

RA0_

AN0

RA1_

ANA1

TP L

OO

P Y

ello

wTP

30TP

LO

OP

Yel

low

TP31

TP L

OO

P Y

ello

wTP

32

PM

Tes

t Poi

nts

RB15

_PW

M1L_

BUCK

RB14

_PW

M1H_

BUCK

RB13

_PW

M2L_

BOOS

T

BU

CK

_VFB

:V

buck

_FB

= 5

00 m

V/V

Vbu

ck_F

B =

1.65

@3.

3V

BO

OST

_CS

from

RES

:V

BO

OST

_CS_

offs

et =

1V

VB

OO

ST_C

S =

1V/A

1% 1k 0603

R57

0.1 μ

F50

V06

03

C57

GN

D_A

Temp

_Sen

sor

RB7_

AN2

Tem

p S

enso

r Filt

er

+3.3

V

GN

D_A1% 1k 06

03

R73

BAT4

1D

32

BOOS

T_OU

T

5600

pF06

0325

V

C70

1% 100R

0603

R74

6.98k

0603

1%R72

TP LO

OP Y

ellow

TP42

Via 1

.6x1

TP43

RD10

_AN1

8_BO

OST_

VFB

20R

0603

1%R71

TP L

OO

P R

edTP

41

GN

D_A

Boo

st V

olta

ge F

eedb

ack

Net

wor

k

BO

OST

_VFB

:V

BO

OST

_FB

= 1

25 m

V/V

VB

OO

ST_F

B =

1.8

75 @

15V

V B

OO

ST_C

S_A

MP

VO

FFSE

T = 3

00 m

V

VSE

NSE

= 1

.64V

/A

V B

UC

K_C

S_A

MP

V OF

FSET

= 3

.3V

/2 =

1.65

VV

SEN

SE =

600

mV

/A

V B

UC

K_C

S_TR

AV

SEN

SE =

1V

/AB

OO

ST_C

S_R

ES:

VB

OO

ST_C

S =

0.25

V/A

560 p

F06

0350

V

C73

GN

D_A

560 p

F06

0350

V

C65

GN

D_A

Via 1

.6x1

TP48

Via 1

.6x1

TP49



FIGURE A-8: USER INTERFACE

LCD_Control

RST

1SC

L4

CSB

3R

S2

VD

D7

VO

UT

8C

1+9

C1-

10

AK

Vss

6

SI5

NHD-C0216CZ-FSW-FBW-3V3LCD1

GND_D

+3.3V

1 μF16V0603

C88

1 μF16V0603

C871 μF16V0603

C86

GND_D

GND_D

0.1 μF50V0603

C85

+3.3V

GND_D

LCD_SELLCD_CSB

LCD_DATALCD_CLOCK

LCD_Reset

LCD_Control

GND_D

1%10k0603

R86

+3.3V

14

23S1

Push ButtonsSW_USER

SW_RESETSW1

SW2

SWITCH

GND_D

1%10k0603

R87

+3.3V

14

23S2

LCD_DATA

LCD_SEL

LCD_CLOCK

LCD_CSB

LCD_Reset

dsPIC_RESET

USER

10R06031%

R85



FIGURE A-9: PROTECTION AND ON-BOARD LOAD CONTROL

1 μF

16V

0603

C92

1k 0603

1%R10

0

0603

DNP

R10

3

OC

P B

uck

1% 10k

0603

R14

2

+3.3

V

14

23 S1

0

Buck

Loa

d

1% 10k

0603

R14

3

+3.3

V

14

23 S1

1

Boo

st L

oad

Boo

st_Pr

otec

tion

Boo

st_G

ate_

EN

BO

OST

_VFB

BO

OST

_CS

Boo

st_Pr

otec

tion

BOOS

T_OU

T

BOOS

T_GA

TE

Buc

k_Pr

otec

tion

Buc

k_O

CP

BU

CK

_VFB

BU

CK

_CS_

TRA

Buc

k_O

VP

Buc

k_Pr

otec

tion

BUCK

_OUT

Buc

k_Lo

ad_C

trlB

UC

K_L

OA

D_1

BU

CK

_LO

AD

_2B

UC

K_L

OA

D_3

Buc

k_Lo

ad_C

trlBU

CK_L

OAD_

1BU

CK_L

OAD_

2

Boo

st_Lo

ad_C

trlB

OO

ST_L

OA

D_1

BO

OST

_LO

AD

_2B

OO

ST_L

OA

D_3

Boo

st_Lo

ad_C

trlBO

OST_

LOAD

_1BO

OST_

LOAD

_2

PIC2

4_UA

RT_T

X

PIC2

4_UA

RT_R

X

PIC

24_U

AR

TPI

C24

_UA

RT_R

X

PIC

24_U

ART

_TX

PIC

24_U

ART

GREE

N06

03

LD11

GREE

N06

03

LD12

GREE

N06

03

LD14

GREE

N06

03

LD15

GREE

N06

03

LD10

GREE

N06

03

LD13

Prot_

PB1

Prot_

PB2

IN+

3

IN-

41

V-

2V+

5

MIC6

270

U53

1 μF

16V

0603

C94

1k 0603

1%R11

0

0603

DNP

C95

0603

DNP

R11

3

OC

P Bo

ost

IN+

3

IN-

41

V-

2V+

5

MIC6

270

U54

BUCK

_LOA

D_3

BOOS

T_LO

AD_3

Temp

_Sen

sor

Tem

p_Se

nsor

LED_

Row_

1

LED_

Row_

2

LED_

Row_

3

LED_

Col_1

LED_

Col_2

LED_

Col_3

Buc

k Lo

ad 1

Buc

k Lo

ad 2

Buc

k Lo

ad 3

Boo

st L

oad

1

Boo

st L

oad

2

Boo

st L

oad

3

Buc

k E

rror

Boo

st E

rror

Ther

mal

Err

or

RED

0603

LD16

RED

0603

LD17

RED

0603

LD18

+3.3

V

GN

D_D

1 μF

16V

0603

C99

GN

D_D

BUCK

_LOA

D_1

BUCK

_LOA

D_2

BOOS

T_LO

AD_1

BOOS

T_LO

AD_2

LED_

Row_

1

+3.3

V

GN

D_D

PROT

_RB0

_PGD

1PR

OT_R

B1_P

GC1

1 2 3 4 5 6

HDR-

1.27 M

ale 1x

6DN

P

J7PR

OT_M

CLR

PROT

_RB0

_PGD

1PR

OT_R

B1_P

GC1

1% 10k

0603

R14

0

BUCK

_LOA

D_3

BOOS

T_LO

AD_3

PROT

_RB2

LED_

Row_

2

LED_

Row_

3

LED_

Col_1

LED_

Col_2

LED_

Col_3

1 μF

16V

0603

C10

0

GN

D_D

Prot_

PB1

Prot_

PB2

PROT

_MCL

R

10 μ

F10

V06

03

C10

10.1

μF

50V

0603

C98

GN

D_D

330R

R14

1

+3.3

V

1% 1k 0603

R14

41% 1k 06

03

R14

51% 1k 06

03

R14

6

BOOS

T_CS

_AMP

RP9

/SD

A1/

CN

21/P

MD

3/R

B9

1

RP2

2/C

N18

/PM

A1/

RC

62

RP2

3/C

N17

/PM

A0/

RC

73

RP2

4/C

N20

/PM

A5/

RC

84

RP2

5/C

N19

/PM

A6/

RC

95

DIS

VR

EG6

VC

AP/

VD

DC

OR

E7

PGD

2/EM

UD

2/R

P10/

CN

16/P

MD

2/R

B10

8

PGC

2/EM

UC

2/R

P11/

CN

15/P

MD

1/R

B11

9

AN

12/R

P12/

CN

14/P

MD

0/R

B12

10

AN

11/R

P13/

CN

13/P

MR

D/R

B13

11

TMS/

PMA

10/R

A10

12

TCK

/PM

A7/

RA

713

AN

10/C

VR

EF/R

TCC

/RP1

4/C

N12

/PM

WR

/RB

1414

AN

9/R

P15/

CN

11/P

MC

S1/R

B15

15

AV

ss16

AV

DD

17

MC

LR18

AN

0/V

REF

+/C

N2/

RA0

19

AN

1/V

REF

-/CN

3/RA

120

PGD

1/EM

UD

1/A

N2/

C2I

N-/R

P0/C

N4/

RB

021

PGC

1/EM

UC

1/A

N3/

C2I

N+/

RP1

/CN

5/R

B1

22

AN

4/C

1IN

-/RP2

/SD

A2/

CN

6/R

B2

23

AN

5/C

1IN

+/R

P3/S

CL2

/CN

7/R

B3

24

AN

6/R

P16/

CN

8/R

C0

25

AN

7/R

P17/

CN

9/R

C1

26

AN

8/R

P18/

CN

10/P

MA

2/R

C2

27

VD

D28

Vss

29

OSC

I/CLK

I/CN

30/R

A2

30

OSC

O/C

LKO

/CN

29/R

A3

31

TDO

/PM

A8/

RA

832

SOSC

I/RP4

/CN

1/R

B4

33

SOSC

O/T

1CK

/CN

0/RA

434

TDI/P

MA

9/R

A9

35

RP1

9/C

N28

/PM

BE/

RC

336

RP2

0/C

N25

/PM

A4/

RC

437

RP2

1/C

N26

/PM

A3/

RC

538

Vss

39

VD

D40

PGD

3/EM

UD

3/R

P5/A

SDA

1/C

N27

/PM

D7/

RB

541

PGC

3/EM

UC

3/R

P6/A

SCL1

/CN

24/P

MD

6/R

B6

42

RP7

/INT0

/CN

23/P

MD

5/R

B7

43

RP8

/SC

L1/C

N22

/PM

D4/

RB

844

EP45

PIC2

4FJ6

4GA0

04

U50

LTH

3

HTH

1

OU

T4

GN

D

2VD

D

5

R SQ

1.24

V

MIC8

41H

U51

+3.3

V+3

.3V

BUCK

_OUT

1 μF

16V

0603

C90

LTH

3

HTH

1

OU

T4

GN

D

2VD

D

5

R SQ

1.24

V

MIC8

41H

U52

+3.3

V+3

.3V

BOOS

T_OU

T

1 μF

16V

0603

C91

+3.3

V

GN

D_D

+3.3

V+3

.3V

+3.3

V+3

.3V

+3.3

V

GN

D_D

BOOS

T_OC

P_GA

TE

BUCK

_OCP

_GAT

E

26 1

MMDT

2227

MQ

30A

5

4 3

MMDT

2227

MQ

30B

5

4 3

MMDT

2227

MQ

32B

26 1

MMDT

2227

MQ

32A

BOOS

T_OC

P_CL

R

BUCK

_OCP

_CLR

BOOS

T_OV

P_CL

R

BUCK

_OVP

_CLR

BUCK

_OVP

_CMP

BOOS

T_OV

P_CM

P

BUCK

_OVP

_CMP

BUCK

_OVP

_CLR

BOOS

T_OV

P_CL

R

BUCK

_OCP

_CLR

BOOS

T_OC

P_CL

R

BUCK

_OCP

_GAT

EBU

CK_O

VP_C

MP

Via 1

.6x1

TP60

Via 1

.6x1

TP61

Via 1

.6x1

TP62

Via 1

.6x1

TP63

Via 1

.6x1

TP64

Via 1

.6x1

TP65

B052

0WS

DNP

D40

B052

0WS

DNP

D41

1% 1k 0603

R10

6

1% 1k 0603

R11

6

Trip

Lev

el: 1

8,15

V

Trip

Lev

el: 4

.044

V

29.4k

0603

1%R91

13k

0603

1%R92

PIC2

4_UA

RT_R

XPI

C24_

UART

_TX

3

12

TP21

04Q

31

3

12

TP21

04Q

33

BOOS

T_CS

_AMP

PROT

_GPI

O2

PROT

_GPI

O3

PROT

_GPI

O4

GN

D_D

GN

D_D

GN

D_D

GN

D_D

1% 1k 0603

R10

5

1% 1k 0603

R11

5

1 μF

16V

0603

C97

GN

D_D

41 2

GN

D 3VC

C5

74HC

1G02

U55

BOOS

T_GA

TE

GN

D_D

+3.3

V

1 μF

16V

0603

C96

GN

D_D

GN

D_D

GN

D_D

BOOS

T_OC

P_GA

TE

11k

0603

1%R95

150k

0603

1%R94

GN

D_P

GN

D_P

GN

D_D

GN

D_D

GN

D_D

BUCK

_OCP

_GAT

E

BOOS

T_OC

P_GA

TE

1%10k

0603

R90

1%10k

0603

R93

1% 10k

0603

R10

11% 10

k06

03

R10

2

1%10k

0603

R10

7

1% 10k

0603

R11

1

1%10k

0603

R11

2

1%10k

0603

R11

7

0603

DNP

C93

1% 1k 0603

R10

4

1% 1k 0603

R11

4

BOOS

T_OV

P_CM

P

1% 1k 0603

R10

8

1% 1k 0603

R11

8

1% 1k 0603

R10

9

1% 1k 0603

R11

9

BAT4

1D

42

OV

P B

uck

OV

P B

oost

BUCK

_CS_

TRA

BUCK

_CS_

TRA

1% 1k 0603

R14

7

0.1 μ

F50

V06

03

C10

3

Tem

p S

enso

r Filt

er

1% 1k 0603

R12

0

GN

D_D

GN

D_D

GN

D_D

GN

D_D

GN

D_D

3.0V

3.0V

GN

D_D

Via 1

.6x1

TP66 Via 1

.6x1

TP67 Via 1

.6x1

TP68

PROT

_GPI

O2

PROT

_GPI

O3

PROT

_GPI

O4

PROT

_RB2

Trip

Lev

el: 1

.64A

Trip

Lev

el: 3

A

220 p

F50

V06

03

C10

2



FIGURE A-10: ON-BOARD LOAD AND TEMPERATURE SENSOR

0.1 μ

F50

V06

03

C20

0

0.1 μ

F50

V06

03

C20

1Te

mp_S

enso

r

Tem

pera

ture

Sen

sor

GN

D2

VO

UT

3

VD

D4

MCP9

700

U56

+3.3

V

Tem

p_Se

nsor

BO

OST

_OU

T

Boo

st_Lo

ad_C

trlB

OO

ST_L

OA

D_1

BO

OST

_LO

AD

_2B

OO

ST_L

OA

D_3

Boo

st_Lo

ad_C

trlBO

OST_

LOAD

_1BO

OST_

LOAD

_2BO

OST_

LOAD

_3

GN

D_P

1% 10R

0603

R28

8

GN

D_P

GN

D_P

1% 10R

0603

R29

0

GN

D_P

0.45

W1.

05W

1.5W

MCP8

7130

T-U/

MF

4

1,2,3

5,6,7,

8 Q51

MCP8

7130

T-U/

MF

4

1,2,3

5,6,7,

8 Q52

GN

D_P

1% 10R

0603

R28

6

10k

0603

1%R28

7

GN

D_P

MCP8

7130

T-U/

MF

4

1,2,3

5,6,7,

8 Q50

30 m

A70

mA

200

mA

100

mA

100

mA

10k

0603

1%R28

910

k06

031%R

291

499R

1206

1%R25

049

9R12

061%R

251

499R

1206

1%R25

249

9R12

061%R

253

215R

1206

1%R25

415

0R12

061%R

270

215R

1206

1%R25

521

5R12

061%R

256

215R

1206

1%R25

7

215R

1206

1%R25

821

5R12

061%R

259

215R

1206

1%R26

021

5R12

061%R

261

215R

1206

1%R26

221

5R12

061%R

263

215R

1206

1%R26

421

5R12

061%R

265

215R

1206

1%R26

621

5R12

061%R

267

215R

1206

1%R26

821

5R12

061%R

269

150R

1206

1%R27

115

0R12

061%R

272

150R

1206

1%R27

3

150R

1206

1%R27

415

0R12

061%R

275

150R

1206

1%R27

615

0R12

061%R

277

150R

1206

1%R27

815

0R12

061%R

279

150R

1206

1%R28

015

0R12

061%R

281

150R

1206

1%R28

215

0R12

061%R

283

150R

1206

1%R28

415

0R12

061%R

285

BOOS

T_LO

AD_2

BOOS

T_LO

AD_3

GN

D_P

1% 10R

0603

R23

8

GN

D_P

GN

D_P

1% 10R

0603

R24

0

GN

D_P

0.33

W1.

32W

1.65

W

BUCK

_LOA

D_2

MCP8

7130

T-U/

MF

4

1,2,3

5,6,7,

8 Q41

MCP8

7130

T-U/

MF

4

1,2,3

5,6,7,

8 Q42

Buc

k_Lo

ad_C

trlB

UC

K_L

OA

D_1

BU

CK

_LO

AD

_2B

UC

K_L

OA

D_3

Buc

k_Lo

ad_C

trlBU

CK_L

OAD_

1BU

CK_L

OAD_

2

GN

D_P

1% 10R

0603

R23

6

10k

0603

1%R23

7

GN

D_P

MCP8

7130

T-U/

MF

4

1,2,3

5,6,7,

8 Q40

BUCK

_LOA

D_3

BUCK

_LOA

D_3

100

mA

400

mA

1000

mA

500

mA

500

mA

8.25R

1206

1%R20

433

R12

061%R

200

33R

1206

1%R20

1

33R

1206

1%R20

233

R12

061%R

203

6.65R

1206

1%R22

0

10k

0603

1%R23

910

k06

031%R

241

8.25R

1206

1%R20

58.2

5R12

061%R

206

8.25R

1206

1%R20

7

8.25R

1206

1%R20

88.2

5R12

061%R

209

8.25R

1206

1%R21

08.2

5R12

061%R

211

8.25R

1206

1%R21

28.2

5R12

061%R

213

8.25R

1206

1%R21

48.2

5R12

061%R

215

8.25R

1206

1%R21

68.2

5R12

061%R

217

8.25R

1206

1%R21

88.2

5R12

061%R

219

6.65R

1206

1%R22

16.6

5R12

061%R

222

6.65R

1206

1%R22

3

6.65R

1206

1%R22

46.6

5R12

061%R

225

6.65R

1206

1%R22

66.6

5R12

061%R

227

6.65R

1206

1%R22

86.6

5R12

061%R

229

6.65R

1206

1%R23

06.6

5R12

061%R

231

6.65R

1206

1%R23

26.6

5R12

061%R

233

6.65R

1206

1%R23

46.6

5R12

061%R

235

BU

CK

_OU

T

Via 1

.6x1

TP74

Via 1

.6x1

TP75

Load

for B

uck

Con

verte

r

Load

for B

oost

Con

verte

r

1% 100R

0603

R30

0Vi

a 1.6x

1TP

76

GN

D_P

GN

D_P

10R

0603

1%R30

1



FIGURE A-11: POWER INPUT AND COMMUNICATIONS

12

34

50

IDD

+V5+

-D

GN

DM

icro

-AB

Rec

epta

cle

USB2

.0 MI

CRO-

B FE

MALE

J6

GN

D_S

+5V

_USB

USB_

N

USB_

P

MCP2

221A

VD

D16

GP0

1

GP1

2

RST

3

UA

RT R

X4

UA

RT T

X5

GP2

6

GP3

7

SDA

8

SCL

9V

USB

10

D-

11D

+12

Vss

13

EP17

NC

14

NC

15

U61

3

14

2

7442

3090

0

L10

WE

CN

SW1

2

3 4 5 6

8240

0152

D50

GN

D_U

GN

D_U

VD

D33

1

VD

D33

9

VD

D33

18

XTA

LIN

/CLK

IN22

XTA

LOU

T21

OC

S_N

18

OC

S_N

212

USB

DM

_UP

19U

SBD

P_U

P20

NO

N_R

EM1/

SMB

DA

TA13

SUSP

_IN

D/N

ON

-REM

017

RES

ET_N

15

CFG

_SEL

0/SM

BC

LK14

VSS

/PA

D25

VB

US_

DET

16PR

TPW

R1

7

PRTP

WR

211

USB

DM

_DN

12

USB

DP_

DN

13

USB

DM

_DN

24

USB

DP_

DN

25

CR

FILT

10PL

LFIL

T23

RB

IAS

24

NC

6

USB2

422T

-I/MJ

U60

1324

MHz

Y2

USB_

UART

_D_P

USB_

UART

_D_N

GN

D_U

USB_

PKOB

_D_P

USB_

PKOB

_D_N

USB

_PK

OB

USB

_PK

OB

_D_P

USB

_PK

OB

_D_N

USB

_PK

OB

18 pF

50V

0603

C11

418

pF50

V06

03

C11

5

GN

D_U

GN

D_U

100k

0603

1%R15

3

100k

0603

1%R15

4

GN

D_U

GN

D_U56

k06

031%R

155

56k

0603

1%R15

656

k06

031%R

157

GN

D_U

+3.3

V_U

SB

+3.3

V_U

SB

GN

D_U

+3.3

V_U

SB

1 μF

16V

0603

C11

612

k06

031%R

159

1M 0603

1%R15

8

10 μ

F10

V06

03

C12

0

GN

D_U

To C

ontro

l

To P

KO

B

US

B/U

AR

T In

terfa

ce

2-P

ort U

SB

HU

BU

SB

Por

t

0.1 μ

F50

V06

03

C11

1

0.1 μ

F50

V06

03

C11

70.1

μF

50V

0603

C11

806

03DN

P

C11

206

03DN

P

C11

3

1 μF

16V

0603

C12

2

15R

0603

1%R

151

15R

0603

1%R

152

1%33

0R06

03R

161

1%33

0R06

03R

162

600R

0603

1AFB3

1 μF

16V

0603

C12

1

GN

D_U

0.1 μ

F50

V06

03

C11

9

GN

D_U

0.1 μ

F50

V06

03C

110

1%4.7

k06

03R

150

GN

D_U

GN

D_U

RC13

_RP6

1_UA

RT1_

RX

RC12

_RP6

0_UA

RT1_

TX

dsPI

C_U

ART

dsPI

C_U

ART

_TX

dsPI

C_U

ART

_RX

dsPI

C_U

AR

T

USB_

UART

_D_P

USB_

UART

_D_N

USB_

PKOB

_D_P

USB_

PKOB

_D_N

1%10k

0603

R16

0

+5V

_USB

600R

0603

1AFB2

GN

D_U



NOTES:



Appendix B. Bill of Materials (BOM)

This appendix contains the Bill of Materials (BOM) for the dsPIC33C Digital Power Starter Kit.

• Bill of Materials

B.1 BILL OF MATERIALS

Table B-1 shows the Bill of Materials for the dsPIC33C Digital Power Starter Kit.

TABLE B-1: dsPIC33C DIGITAL POWER STARTER KIT BILL OF MATERIALS (BOM)

Qty Designator Description Manufacturer Manufacturer Part Number

5 C1, C5, C24, C40, C46 Capacitor, Ceramic, 10 µF, 50V, 20%, X7R, SMD, 1210

TDK Corporation C3225X7R1H106M250AC

1 C2 Capacitor, Aluminium, 100 µF, 25V, 20%, SMD, W6.6L6.6H7.7

Wurth Elecktronik 865090445008

20 C6, C21, C22, C31, C32, C41, C47, C50, C55, C57, C85, C98, C103, C110, C111, C117, C118, C119, C200, C201

Capacitor, Ceramic, 0.1 µF, 50V, 20%, X7R, SMD, 0603

TDK Corporation C1608X7R1H104M

7 C7, C8, C9, C10, C54, C101, C120

Capacitor, Ceramic, 10 µF, 10V, 20%, X5R, SMD, 0603

Samsung Group CL10A106MP8NNNC

1 C20 Capacitor, Ceramic, 4.7 µF, 16V, 10%, X5R, SMD, 0603

TDK Corporation C1608X5R1C475K080AC

2 C23, C44 Capacitor, Aluminium, Polymer, 100 µF, 25V, 20%, SMD


1 C25 Capacitor, Ceramic, 1500 pF, 50V, 5%, C0G, SMD, 0603

Murata Electronics® GRM1885C1H152JA01D

1 C27 Capacitor, Tantalum, Polymer, 100 µF, 10V, 20%, 40 mR, SMD, 2917

KEMET T520W107M010ATE040

19 C28, C42, C51, C52, C53, C86, C87, C88, C90, C91, C92, C94, C96, C97, C99, C100, C116, C121, C122

Capacitor, Ceramic, 1 µF, 16V, 10%, X5R, SMD, 0603

AVX Corporation 0603YD105KAT2A

2 C33, C43 Capacitor, Ceramic, 680 pF, 25V, 10%, X7R, 0603


1 C45 Capacitor, Ceramic, 4.7 µF, 25V, 20%, Y5V, SMD, 0805

TDK Corporation C2012Y5V1E475Z

3 C56, C61, C70 Capacitor, Ceramic, 5600 pF, 25V, 5%, C0G, SMD, 0603

TDK Corporation C1608C0G1E562J080AA

3 C64, C65, C73 Capacitor, Ceramic, 560 pF, 50V, 5%, C0G, NP0, SMD, 0603

KEMET C0603C561J5GACTU



1 C72 Capacitor, Ceramic, 10 pF ±0.5 pF, 50V, C0G, SMD, 0603

TDK Corporation C1608C0G1H100D

1 C102 Capacitor, Ceramic, 220 pF, 50V, 5%, NP0, SMD, 0603


2 C114, C115 Capacitor, Ceramic, 18 pF, 50V, 5%, NP0, SMD, 0603


1 D1 Diode, Schottky, SS110, 850 mV, 1A, 100V, DO-214AC_SMA

Micro Commercial Components

SS110-TP

6 D2, D10, D31, D32, D33, D42

Diode, Schottky, BAT41, 1V, 200 mA, 100V, SOD-123

STMicroelectronics BAT41ZFILM

2 D3, D4 Diode, Schottky, B0520WS, 430 mV, 500 mA, 20V, SOD-323

Diodes Incorporated® B0520WS-7-F

1 D50 Diode, TVS Array, 82400152, 5V, USB 2.0, SMD, SOT-563


4 FB1, FB2, FB3, FB4 Ferrite, 600R at 100 MHz, 1A, SMD, 0603

Bourns®, Inc. MH1608-601Y

1 J1 Connector, Power, 2 mm, 5.5 mm, Switch, TH, R/A

CUI Inc. PJ-002A

2 J2, J3 Connector, Terminal, 5 mm, 1x2 Female, 12-26AWG, 18A, TH, R/A

PHOENIX CONTACT 1935161

1 J6 Connector, USB 2.0, Micro-B, Female, TH/SMD, R/A

FCI 10118194-0001LF

2 L1, L5 Inductor, 1.4 µH, 3.3A, 38 mR, SMD, SDR0403

Bourns, Inc. SDR0403-1R4ML

1 L2 Inductor, 15 µH, 1.16A, 20%, SMD, MSS6132

Coilcraft MSS6132-153ML

1 L3 Inductor, 10 µH, 7A, 20%, SMD, L6.56W6.36H6.1

Coilcraft XAL6060-103MEB

1 L4 Inductor, 33 µH, 2.9A, 20%, SMD, L10W10H5


1 L10 CM Choke, 90R, 100 MHz, 0.145R, 550 mA, SMD, 0603


1 LCD1 LCD COG Character, 2x16, White, Transflective

Newhaven Display International, Inc.

NHD-C0216CZ-FSW-FBW-3V3

8 LD1, LD2, LD10, LD11, LD12, LD13, LD14, LD15

Diode, LED, Green, 2V, 30 mA, 35 mcd, Clear, SMD, 0603

Lite-On®, Inc. LTST-C190KGKT

4 LD5, LD16, LD17, LD18 Diode, LED, Red, 1.8V, 40 mA, 10 mcd, Clear, SMD, 0603

Lite-On, Inc. LTST-C190KRKT

1 PTC1 Resettable Fuse, 1.25A, 2.5A, 33V, PTC, SMD, 2920

Littelfuse® SMDC125F/33-2

2 Q30, Q32 Transistor, BJT Dual, NPN+PNP, MMDT2227M, 40V-60V, 0.6A, -0.6A, 0.3W, SOT-23-6

Diodes Incorporated MMDT2227M-7

TABLE B-1: dsPIC33C DIGITAL POWER STARTER KIT BILL OF MATERIALS (BOM) (CONTINUED)



Bill of Materials (BOM)

1 R1 Resistor, TKF, 52.3k, 1%, 1/10W, SMD, 0603

Panasonic® - ECG ERJ-3EKF5232

22 R2, R17, R19, R33, R86, R87, R90, R93, R102, R107, R112, R117, R140, R142, R143, R160, R237, R239, R241, R287, R289, R291

Resistor, TKF, 10k, 1%, 1/10W, SMD, 0603

Vishay Intertechnology, Inc.

CRCW060310K0FKEA

6 R3, R4, R11, R12, R31, R53

Resistor, TKF, 3.3k, 1%, 1/10W, SMD, 0603

Panasonic - ECG ERJ-3EKF3301V

2 R6, R8 Resistor, TKF, 0R, SMD, 1206 Yageo Corporation RC1206JR-070RL

1 R7 Resistor, TKF, 2.2R, 1%, 1/4W, SMD, 1206

Yageo Corporation RC1206FR-072R2L

11 R10, R30, R32, R85, R236, R238, R240, R286, R288, R290, R301

Resistor, TKF, 10R, 1%, 1/10W, SMD, 0603

Stackpole Electronics Inc.

RMCF0603FT10R0

7 R14, R52, R56, R64, R65, R74, R300

Resistor, TKF, 100R, 1%, 1/10W, SMD, 0603


2 R15, R150 Resistor, TKF, 4.7k, 1%, 1/10W, SMD, 0603


CRCW06034K70FKEA

2 R16, R18 Resistor, TKF, 1R, 1%, 1/10W, SMD, 0603

Yageo Corporation RC0603FR-071RL

1 R20 Resistor, TKF, 5.6R, 1/10W, 1%, SMD, 0603


CRCW06035R60FKEA

1 R21 Resistor, MS, 0.03R, 1%, 1W, SMD, 1206


WSLP1206R0300FEA

2 R34, R35 Resistor, TKF, 0.5R, 1%, 1/2W, SMD, 1206

Stackpole Electronics Inc.

CSR1206FKR500

17 R36, R204, R205, R206, R207, R208, R209, R210, R211, R212, R213, R214, R215, R216, R217, R218, R219

Resistor, TKF, 8.25R, 1%, 1/4W, SMD, 1206


CRCW12068R25FKEA

1 R37 Resistor, MFO, 0.082R, 1%, 3/4W, SMD, 1206

Susumu Co., Ltd. KRL1632E-M-R082-F-T5

1 R43 Resistor, TKF, 20k, 1%, 1/10W, SMD, 0603


2 R50, R68 Resistor, TKF, 0R, 1/10W, SMD, 0603

NIC Components NRC06Z0TRF

4 R51, R141, R161, R162 Resistor, TKF, 330R, 1%, 1/10W, SMD, 0603


2 R54, R72 Resistor, TKF, 6.98K, 1%, 1/10W, SMD, 0603, AEC-Q200


23 R55, R57, R62, R63, R73, R77, R100, R104, R105, R106, R108, R109, R110, R114, R115, R116, R118, R119, R120, R144, R145, R146, R147

Resistor, TKF, 1k, 1%, 1/10W, SMD, 0603


4 R60, R69, R71, R78 Resistor, TKF, 20R, 1%, 1/10W, SMD, 0603

Panasonic - ECG ERJ-3EKF20R0V





1 R67 Resistor, TKF, 56R, 1%, 1/10W, SMD, 0603

Panasonic® - ECG ERJ-3EKF56R0V

1 R75 Resistor, TKF, 560R, 1%, 1/10W, SMD, 0603

Yageo Corporation RC0603FR-07560RL













2 R101, R111 Resistor, TKF, 10k, 1%, 1/10W, SMD, 0603

ROHM Semiconductor MCR03EZPFX1002

2 R151, R152 Resistor, TKF, 15R, 1%, 1/16W, SMD, 0603

Stackpole Electronics, Inc.

RMCF0603FT15R0

2 R153, R154 Resistor, TKF, 100k, 1%, 1/4W, SMD, 0603


CRCW0603100KFKEAHP

3 R155, R156, R157 Resistor, TKF, 56k, 1%, 1/10W, SMD, 0603


1 R158 Resistor, TKF, 1M, 1%, 1/10W, SMD, 0603



Stackpole Electronics, Inc.

RMCF0603FT12K0

4 R200, R201, R202, R203 Resistor, TKF, 33R, 1%, 1/4W, SMD, 1206, AEC-Q200

Panasonic - ECG ERJ-8ENF33R0V

16 R220, R221, R222, R223, R224, R225, R226, R227, R228, R229, R230, R231, R232, R233, R234, R235

Resistor, TKF, 6.65R, 1%, 1/4W, SMD, 1206

Yageo Corporation RC1206FR-076R65L

4 R250, R251, R252, R253 Resistor, TKF, 499R, 1%, 1/4W, SMD, 1206, AEC-Q200

Panasonic - ECG ERJ-8ENF4990V


Resistor, TKF, 215R, 1%, 1/4W, SMD, 1206 AEC-Q200



Resistor, TKF, 150R, 1%, 1/4W, SMD, 1206, AEC-Q200


4 S1, S2, S10, S11 Switch, Tactile, SPST, 12V, 50 mA, TL3301AF160QG, SMD

E-Switch®, Inc. TL3301AF160QG




Bill of Materials (BOM)

5 TP1, TP12, TP22, TP33, TP41

Connector, TP Loop, Red, TH Keystone Electronics Corp.

5010

5 TP30, TP31, TP32, TP34, TP42

Connector, TP Loop, Yellow, TH

Keystone Electronics Corp.

5014

1 TP54 Connector, TP Loop, Black, TH

Keystone Electronics Corp.

5011

1 TR1 Transistor, Current, 1:100, 1 MHz, 20A, SMD

Coilcraft CST7030-100LB

1 U22 IC Logic, Inverter, 2 CH, 74LVC2G04, SOT-363

Nexperia 74LVC2GU04GW,125

1 U23 IC Logic, NOR, 4-INP, 2 CH, 74HC4002, TSSOP-14

Nexperia 74HC4002PW,118

1 U55 IC Logic, 74AHC,1G02SE-7, NOR, 1 CH, 2-INP, SOT-353

Diodes Incorporated® 74AHC1G02SE-7

1 Y2 Crystal, 24 MHz, 18 pF, SMD, L3.2W2.5H0.6

Epson® TSX-3225 24.0000MF10Z-C3

1 D20 Diode, Schottky, HSM560JE3, 650 mV, 5A, 60V, DO-214AB_SMC

Microchip Technology Inc.

HSM560JE3/TR13

9 Q10, Q11, Q20, Q40, Q41, Q42, Q50, Q51, Q52

Microchip Analog MOSFET, N-CH, 25V, 43A, MCP87130T-U/MF PDFN-8


MCP87130T-U/MF

2 Q31, Q33 Microchip Analog MOSFET, P-CH, TP2104, 40V, 160 mA, 360 mW, 6R, SOT23-3


TP2104K1-G

1 U1 Microchip Analog Switcher Buck, 2 to 24V MCP16331T-E/CH SOT-23-6


MCP16331T-E/CH

1 U2 Microchip Analog LDO, 3.3V, MCP1755T-3302E/DC, SOT-223-5


MCP1755T-3302E/DC

1 U20 Microchip Analog FET Driver, Single, Noninverting MCP14700-E/MF


MCP14700-E/MF

1 U30 Microchip Analog FET Driver Single, Noninverting, MCP14A0152 6L SOT-23


MCP14A0152T-E/CH

1 U40 dsPIC33CK256MP505 Microchip Technology Inc.

dsPIC33CK256MP505-I/PT

1 U50 Microchip MCU, 16-bit, 32 MHz, 64 KB, 8 KB, PIC24FJ64GA004-I/ML, QFN-44


PIC24FJ64GA004T-I/ML

2 U51, U52 IC Comparator, W/Ref, 1.25%, MIC841H, SC-70-5


MIC841HYC5-TR

2 U53, U54 Microchip Analog Comparator, 1-CH, MIC6270YM5-TR, SOT-23-5


MIC6270YM5-TR

1 U56 Microchip Analog Temperature Sensor, -40°C to +150°C, MCP9700T-E/LT, SC-70-5


MCP9700T-E/LT





1 U60 Microchip Interface, USB 2.0, High-Speed, 2-Port HUB Controller, QFN-24


USB2422T-I/MJ

1 U61 Microchip Interface, USB, I2C/UART, MCP2221A-I/ML, QFN-16


MCP2221A-I/ML

1 Y1 Microchip Clock Oscillator, Single, 8.000 MHz, DSC6011JI2A-008.0000, VDFN-4


DSC6011JI2A-008.0000





Appendix C. Demonstration Program Operation

The dsPIC33C device on the dsPIC33C Digital Power Starter Kit is preprogrammed with Peak Current mode control application software that illustrates simultaneous 2-Pole, 2-Zero (2P2Z) compensator control of the output voltage for the two DC/DC Converter circuits. This code can be downloaded from the Microchip website (www.microchip.com).

This section covers the following topics:

• Program Demonstration• Code Demonstration• Other Code Examples

C.1 PROGRAM DEMONSTRATION

The demonstration program provides simultaneous closed-loop control of the output voltage for both DC/DC Converter stages of the dsPIC33C Digital Power Starter Kit. The high-level block diagram is shown in Figure C-1 and the program flow chart is shown in Figure C-2.

The 2P2Z control loop controls the Buck Converter output voltage to 3.3V and the Boost Converter output voltage to 15V.

The 2P2Z control scheme consists of the following parameters:

• Reference – Desired set point for the output voltage.• Error – Calculation of (Reference – Feedback). This is the value the compensator

acts upon.• System Plant – This is the converter being controlled.• Output – Either the output voltage or current.• Feedback – The measured output signal level.

Please refer to Section C.2.4 “2P2Z SW Control Compensator” for further details.The demonstration program requires no manual preparation, except to connect 9V to the J2 connector.

FIGURE C-1: PEAK CURRENT MODE CONTROL LOOP BLOCK DIAGRAM

+ –

VoltageReference

Inductor

Voltage Feedback

PWM

CurrentSense

Sense

2P2ZCompensator

ADC

1001011011

S&H

+

–

CalculatedPeak

Current

K2

K1VOUT

Internal ComparatorError

System Plant

DAC

VOUT



FIGURE C-2: SMPS DEMONSTRATION PROGRAM FLOW CHART

Start

ADC Interrupts

End

Yes

No

No

YesSoft StartRoutine

DisableOutputsDoes Fault

Condition Exist?

Is SoftStart Active?

Initialization Routines:

• Peripherals – ADC, PWM, Timers, GPIO, LCD, etc.• Variables – Buck/Boost Compensator Coefficient

Initializations, Data Buffers• Interrupts – ADC, Timers• Set Soft Start Flag• Initialize Load Configuration (static/dynamic)

Endless (while (1)) Loop Functions:

• Update LCD Display Information• Display Faults (if any)• Check if S2 has been Pressed (to toggle what is viewed

on display)

ADC Interrupt Routines:

• Monitor Converter Currents• Call 2P2Z controller and set

peak current reference• Monitor VIN is Within Allowable Limits• Monitor Converter Temperature(s)• Monitor Converter Voltages • Check if Fault Flags are Active

Fault Check Routine

Soft Start Routine

and DisplayFault(s) on

LCD Screen


Demonstration Program Operation

C.2 CODE DEMONSTRATION

C.2.1 System Initialization

When power is applied to the board, the program starts by executing the following system initialization routines:

• Peripherals – The required peripherals (PWM, ADC, comparators, I2C module, timers and GPIO) are configured and enabled.

• Interrupts – Include ADC(s), timer(s), comparator(s) interrupts.

• Loads – Can be configured for either Static mode or Dynamic mode. If Dynamic mode is selected, a switching frequency can be configured in application SW.

C.2.2 Fault Check

The program checks for any Faults that might have occurred during program operation. The Fault checks include the following:

• Input Over/Undervoltage • Buck/Boost Converter Overtemperature• Buck/Boost Soft Start

If any of the listed Faults occur, the corresponding Fault will be shown on the LCD display. The corresponding PWM signals and loads are disabled until the Fault condition has been cleared. Fault checks are dispersed throughout all the interrupts. If no Fault condition is detected, the program proceeds.

C.2.3 Soft Start

The Soft Start routine ramps up the output voltage in a closed-loop fashion until it is at the programmed output voltage value. This routine ensures that the output does not overshoot the desired voltage.

C.2.4 2P2Z SW Control Compensator

The 2-Pole, 2-Zero (2P2Z) Controller, implemented in SW, is the digital implementation of the Analog Type II Controller. This filter maintains regulation of the output voltage and ensures stability during different line/load conditions. This controller requires three feedback errors, multiplied by their associated coefficients, plus the two latest controller output values, multiplied by their associated coefficients, along the delay line to provide proper compensation of the power converter. The coefficients are determined externally using simulation tools.

Reference the smps_2p2z_dspic_v2 source file and smps_control.h header files in the DPSK software package for further implementation details.

C.2.5 System While (1) Loop

The LCD refresh functions are called within the system Idle routine. The routine refreshes the LCD screen based on both user input (S2) and converter feedback (Fault flags/VIN measurement/converter output voltage). All Fault display updates are per-formed in the system Idle loop routine, as well as the toggling of the displayed measurements as the results of pressing S2.

C.3 OTHER CODE EXAMPLES

There are several other SMPS code examples available on the Microchip website. Refer to the Readme files located in each code example folder for details on what each code example demonstrates. Check the Microchip website (www.microchip.com/SMPS) for the latest updates to the code examples and for additional code examples.



AMERICASCorporate Office2355 West Chandler Blvd.Chandler, AZ 85224-6199Tel: 480-792-7200 Fax: 480-792-7277Technical Support: http://www.microchip.com/supportWeb Address: www.microchip.com

AtlantaDuluth, GA Tel: 678-957-9614 Fax: 678-957-1455

Austin, TXTel: 512-257-3370

BostonWestborough, MA Tel: 774-760-0087 Fax: 774-760-0088

ChicagoItasca, IL Tel: 630-285-0071 Fax: 630-285-0075

DallasAddison, TX Tel: 972-818-7423 Fax: 972-818-2924

DetroitNovi, MI Tel: 248-848-4000

Houston, TX Tel: 281-894-5983

IndianapolisNoblesville, IN Tel: 317-773-8323Fax: 317-773-5453Tel: 317-536-2380

Los AngelesMission Viejo, CA Tel: 949-462-9523Fax: 949-462-9608Tel: 951-273-7800

Raleigh, NC Tel: 919-844-7510

New York, NY Tel: 631-435-6000

San Jose, CA Tel: 408-735-9110Tel: 408-436-4270

Canada - TorontoTel: 905-695-1980 Fax: 905-695-2078

ASIA/PACIFICAustralia - SydneyTel: 61-2-9868-6733

China - BeijingTel: 86-10-8569-7000

China - ChengduTel: 86-28-8665-5511

China - ChongqingTel: 86-23-8980-9588

China - DongguanTel: 86-769-8702-9880

China - GuangzhouTel: 86-20-8755-8029

China - HangzhouTel: 86-571-8792-8115

China - Hong Kong SARTel: 852-2943-5100

China - NanjingTel: 86-25-8473-2460

China - QingdaoTel: 86-532-8502-7355

China - ShanghaiTel: 86-21-3326-8000

China - ShenyangTel: 86-24-2334-2829

China - ShenzhenTel: 86-755-8864-2200

China - SuzhouTel: 86-186-6233-1526

China - WuhanTel: 86-27-5980-5300

China - XianTel: 86-29-8833-7252

China - XiamenTel: 86-592-2388138

China - ZhuhaiTel: 86-756-3210040

ASIA/PACIFICIndia - BangaloreTel: 91-80-3090-4444

India - New DelhiTel: 91-11-4160-8631

India - PuneTel: 91-20-4121-0141

Japan - OsakaTel: 81-6-6152-7160

Japan - TokyoTel: 81-3-6880- 3770

Korea - DaeguTel: 82-53-744-4301

Korea - SeoulTel: 82-2-554-7200

Malaysia - Kuala LumpurTel: 60-3-7651-7906

Malaysia - PenangTel: 60-4-227-8870

Philippines - ManilaTel: 63-2-634-9065

SingaporeTel: 65-6334-8870

Taiwan - Hsin ChuTel: 886-3-577-8366

Taiwan - KaohsiungTel: 886-7-213-7830

Taiwan - TaipeiTel: 886-2-2508-8600

Thailand - BangkokTel: 66-2-694-1351

Vietnam - Ho Chi MinhTel: 84-28-5448-2100

EUROPEAustria - WelsTel: 43-7242-2244-39Fax: 43-7242-2244-393

Denmark - CopenhagenTel: 45-4450-2828 Fax: 45-4485-2829

Finland - EspooTel: 358-9-4520-820

France - ParisTel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79

Germany - GarchingTel: 49-8931-9700

Germany - HaanTel: 49-2129-3766400

Germany - HeilbronnTel: 49-7131-72400

Germany - KarlsruheTel: 49-721-625370

Germany - MunichTel: 49-89-627-144-0 Fax: 49-89-627-144-44

Germany - RosenheimTel: 49-8031-354-560

Israel - Ra’anana Tel: 972-9-744-7705

Italy - Milan Tel: 39-0331-742611 Fax: 39-0331-466781

Italy - PadovaTel: 39-049-7625286

Netherlands - DrunenTel: 31-416-690399 Fax: 31-416-690340

Norway - TrondheimTel: 47-7288-4388

Poland - WarsawTel: 48-22-3325737

Romania - BucharestTel: 40-21-407-87-50

Spain - MadridTel: 34-91-708-08-90Fax: 34-91-708-08-91

Sweden - GothenbergTel: 46-31-704-60-40

Sweden - StockholmTel: 46-8-5090-4654

UK - WokinghamTel: 44-118-921-5800Fax: 44-118-921-5820

Worldwide Sales and Service

05/14/19

http://support.microchip.com
