usb complient step down charger for portable devices demoboard... · preliminary application note...

AS3610 – AN01 - Demoboard Preliminary Application Note – USB complient Step down Charger for Portable Devices

www.austriamicrosystems.com (mmt) Revision 1.0 / 2010/07/27 1 - 12

AS3610-AN01-Demoboard 1V0 USB complient Step down Charger for Portable Devices

1 General Description The AS3610 is highly integrated standalone or optional I2C controlled step down charger. All supervision and regulation functions are realized internal and independent from the processor. In addition the Charger can generate a 5.05V output supply at VBUS for USB OTG.

2 Key Features

� DCDC USB Charger � 1.2A, 3MHz DCDC Charger � OTG Boost with low IQ (700uA) up to 500mA � Seamless 100% Mode � Reverse Polarity protection on VBUS � NTC support � Low side LED driver � No external shunt resistor required � No Battery operation without voltage drop. � Package MLPD14 3x3mm

3 Applications - 1 Cell Li+ charger for mobile phones and portable devices

Preliminary Application Note



Table of Contents

1 FURTHER APPLICATIONS .................................................................................................................. 3

2 REVISION STATUS ............................................................................................................................. 3

3 GENERAL DESCRIPTION.................................................................................................................... 3

4 GETTING STARTED ............................................................................................................................ 3

5 GUI –SW: FIRST STEPS...................................................................................................................... 4

6.1 GUI – SW: OVERVIEW ........................................................................................................................... 4

6.2 SW VS. PCB: GET THE BOARD FUNCTIONAL ....................................................................................... 5

7 AS3610 DEMOBOARD V1.0 JUMPER AND DEVICE LOCATIONS ......................................................... 7

8 APPLICATION SCHEMATIC AS3610 DEMOBOARD 1V0 ...................................................................... 8

9 AS3610 DEMOBOARD V1.0: LAYOUT (TOP VIEW) ............................................................................ 11

10 AS3610 DEMOBOARD V1.0: LAYOUT (BOTTOM VIEW) .................................................................... 11

COPYRIGHT .............................................................................................................................................. 12

AS3610



1 Further Applications

Visit our home-page: http: //www.austriamicrosystems.com

2 Revision status

AS3610 - AN01 - Demoboard Rev.: 1v0 AS3610 Demoboard – Layout Rev.: 1v0 AS3610 Demoboard – Schematic Rev.: 1v0

3 General description

Remark: all subsequent component numbering refers to the application schematics, shown in pt. Application Schematic.

4 Getting Started

Install the GUI SW which can be found on the USB-BOX or CD-ROM which is included. After that, follow the following sequence to connect the AS3610 Board: (also shown in the picture below)

1. Connect the an USB cable or alternative supply the board from a power supply (5V) 2. Connect the austriamicrosystems AG USB BOX at J1 3. connect a battery to VBAT and GND

A red LED (D2) on the Board immediately indicates a proper connection of the power supply.

( Picture shows AS3610 Demoboard 1V0 )

1 2

3



5 GUI –SW: First steps

If the USB Box and the Device is recognized the bars are shown in green

6.1 GUI – SW: overview

Overview which current can be selected on the Demoboard

Function of Status pin: 0 always off 1 ch_det=ON 2 ch_det=ON, stop_charging or boost_error=5Hz blinking 3 Charging=ON, stop_charging or boost_error=5Hz blinking 4 Charging=ON, EOC=1Hz blinking, stop_charging or boost_error=5Hz blinking 5 ch_det =ON, EOC=1Hz blinking, stop_charging or boost_error=5Hz blinking

Shows the status of the Charger

Select the NTC of the battery: 10 or 100k



6.2 SW vs. PCB: Get the board functional

� Connect Battery (~3.7V Lithium Ionen) to Vbat -> no Power Supply � Connect Power Supply (5V) to Vbus or USB cable � measure current consumption � LED D2 is turning on, current limit about 100/500mA � Set Jumper on NTC (J8) � LED D2 should be blinking, current consumption is 0mA � Disconnect NTC- Jumper and set Jumper USB 500 (J5) to “1” � current consumption is a little bit under

500 mA, set the Jumper back of USB 500 to “0” to get 100mA. � XEN set per Jumper (J3) to “1” � current consumtion = 0mA, set XEN back to “0” � Activate in the SW

- Then

� � in the Register of Charger Status now should be set: ChDet and it is depending on the battery voltage CCM or Trickle or Const. Volt. Mode or EOC is shown.

� Disconnect battery : � CHDet & EOC are set



� Remove the I-Term Jumper: � ChDet & Const. Voltage mode are set

� Re-connect Battery and Jumper � Disable in the SW the “ USB charger enable”

� Disconnect VBUS

� Activate the “ Boost Enable”

� LED D2 is turned on! The Voltage on Vbus is ~5V.



7 AS3610 Demoboard V1.0 jumper and device locations

Listed below are the various connectors and jumpers.

Jumper Function comment

J1 I2C interface

J2 I2C-PWR Uses the power supply from the I2C box

J3 XEN Enable pin for step down charger

J4,J6,J7 ISET Sets the charging current

J9.J10,J11 ITERM Selects Trickle & EOC current

J5 USB 500 Set current limit in charger mode. 100mA/500mA USB current limit

J8 NTC NTC input

J13 Stat. LED Status output pin. J14,J15,J16,J17

Connector for Adapterboard

J18,J19 Stand alone Fixed solution for the Stand alone mode

VBUS 5V supply

GND

VBAT Battery connector

Device Value comment

U1

AS3610 USB complient Step down Charger for Portable Devices

U2 USB connector 5V supply for Vbus

Connector and Jumper locations of AS3610A Demoboard 1V0



8 Application Schematic AS3610 Demoboard 1V0



9 AS3610 Demoboard V1.0: Layout (top view)

Layout (top view)

10 AS3610 Demoboard V1.0: Layout (bottom view)

Layout (bottom view)



Copyright

Copyright © 1997-2010, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies.

Diclaimer Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. Austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or lifesustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services.

Contact Information Headquarters austriamicrosystems AG A-8141 Schloss Premstätten, Austria T. +43 (0) 3136 500 0 F. +43 (0) 3136 5692 For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com/contact

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usb complient step down charger for portable devices demoboard... · preliminary application note...

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