1Rev. 0

DEMO MANUAL DC2038A

I2C

BATSENS+

NTCBIAS

NTC

T

GND

DC2038A TA01a

LTC4162CSP

CSN

CELLCOUNT

VIN

VIN VOUT

VOUTINFET CLP CLN

SW

BATFET

INPUT VOLTAGE (V)5

EFFI

CIEN

CY (%

)

100

90

85

95

80

752515 35

DC2038A TA01b

2010 30

ICHARGE = 2.5A

8 CELLS7 CELLS

6 CELLS5 CELLS4 CELLS

3 CELLS

2 CELLS

1 CELL

DESCRIPTION

LTC4162 35V/3.2A Multi-Cell Step-Down Battery Charger

with PowerPath and I2C Telemetry

Demonstration circuit 2038A shows the LTC®4162 multi-cell step-down battery charger with PowerPath™ and I2C telemetry operating with a configurable chemistry and cell count. The LTC4162 supports up to eight cells for Li-Ion, nine cells for LiFePO4, and 6V, 12V, 18V, or 24V lead-acid batteries. Programmable and fully autonomous charge algorithms can be chosen for each of the chemistries.

PERFORMANCE SUMMARY

TYPICAL APPLICATION

The DC2038A is populated with one of many different IC options for the LTC4162, each suited to a specific chem-istry, battery voltage, and default MPPT enabled state. The DC2038A can be easily configured for a specific use case by moving jumpers to set the number of cells that will be used in the application. The VIN voltage must then be appropriate for the cell count and chemistry selected.

Design files for this circuit board are available.

Specifications are at TA = 25°C

One to Eight Cell, 3.2A Step-Down Switching Battery Charger with PowerPathEfficiency vs Input Voltage

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VIN DC2038A Input Voltage Range 5 35 V

VBAT DC2038A BAT Voltage Range 2.9 35 V

IBAT DC2038A Charge Current 3.2 A

VOUT System Voltage VIN > VBAT VIN – 0.2V VIN V

IOUT VOUT Load Current IBAT = 0A 3.2 A

All registered trademarks and trademarks are the property of their respective owners.

2Rev. 0

DEMO MANUAL DC2038A

TABLE OF CONTENTSDescription......................................................................................................................... 1Performance Summary .......................................................................................................... 1Typical Application ............................................................................................................... 1Demo Board Variants ............................................................................................................. 3Quick Start Procedure ............................................................................................................ 4Configuring Cell Count ........................................................................................................... 5Theory of Operation .............................................................................................................. 5GUI Application ................................................................................................................... 7Parts List ..........................................................................................................................10Schematic Diagram .............................................................................................................12

3Rev. 0

DEMO MANUAL DC2038A

DEMO BOARD VARIANTSThe LTC4162 is available in 18 variants which allows for compatibility with different battery chemistries and default charging characteristics. As a result, the DC2038A assem-blies have been broken down by these same variants.

The only differences between DC2038A variants are:

1. The LTC4162 variant installed

2. The firmware programmed on the SAM D21 processor

Note that not all demo boards are available from Analog Devices, but any board can by converted into a board of any other variant. To do so, remove the LTC4162 (refer-ence designator U1) from the demo board and place a new

LTC4162 IC of the desired variant into the U1 footprint. If the LTC4162 GUI will be used, reprogram the board through the GUI before attempting to use any other fea-tures of the GUI.

Table 1 below maps the demo board variants to the IC variants and gives a brief description of the difference between each IC variant. For more information about each LTC4162 variant, consult the relevant data sheet.

DC2038A variants featuring the adjustable versions of LTC4162 (with MPPT enabled or disabled by default) are available from Analog Devices.

Table 1. Demo Board Variants

BATTERY CHEMISTRY

VARIANT DESCRIPTION

MPPT OFF BY DEFAULT MPPT ON BY DEFAULT

LTC4162 VARIANTDEMO BOARD

VARIANT LTC4162 VARIANTDEMO BOARD

VARIANT

Li-Ion Adjustable LTC4162-LAD DC2038A-A LTC4162-LADM DC2038A-J

4.0V Fixed LTC4162-L40 DC2038A-B LTC4162-L40M DC2038A-K

4.1V Fixed LTC4162-L41 DC2038A-C LTC4162-L41M DC2038A-L

4.2V Fixed LTC4162-L42 DC2038A-D LTC4162-L42M DC2038A-M

LiFePO4 Adjustable LTC4162-FAD DC2038A-E LTC4162-FADM DC2038A-N

3.6V Fixed LTC4162-FST DC2038A-F LTC4162-FSTM DC2038A-O

3.8V Fixed LTC4162-FFS DC2038A-G LTC4162-FFSM DC2038A-P

Lead-Acid Adjustable LTC4162-SAD DC2038A-H LTC4162-SADM DC2038A-Q

Fixed LTC4162-SST DC2038A-I LTC4162-SSTM DC2038A-R

Gray = Unavailable from Analog Devices

4Rev. 0

DEMO MANUAL DC2038A

QUICK START PROCEDURERefer to Figure 1 for the proper measurement equipment setup and jumper settings. Please follow the procedure below to familiarize yourself with the DC2038A.

1. Configure the CELLS1 and CELLS0 jumpers based on the LTC4162 chemistry as follows:.

Li-Ion LiFePO4 LEAD ACID

3 Cells 4 Cells 6 Cells

CELLS1 = INTVCC CELLS1 = VCC2P5 CELLS1 = INTVCC

CELLS0 = GND CELLS0 = INTVCC CELLS0 = VCC2P5

2. Set JP3 = FIXED/EXT and JP4 = FIXED. This places a 10kΩ resistor on the NTC pin which simulates an NTC thermistor at 25°C and allows charging.

3. Configure the test equipment as shown in Figure 1. Leave the power supplies and loads in standby mode. Plug the Micro-B connector on DC2038A into a PC.

4. On the PC, update to the latest version of QuikEval™. Output power from PS1, then run QuikEval to launch the DC2038A GUI.

5. Enable PS2 and LD2. Within a few seconds, observe on the GUI that the battery is charging at 3.2A. The charger is operating in constant current (CC) mode.

6. The default 10mΩ value of RS2 sets the charging cur-rent to 3.2A. Similarly, the default 10mΩ value of RS1 sets the input current limit to 3.2A. Enable LD1 and observe a drop in the charge current being delivered to the battery as the input current is limited. Delivering current to the VOUT node is prioritized over charging the battery.

7. Turn PS2 up to 15V to simulate a battery at full charge. Observe the IBAT current drop to near zero and the IIN current decrease to only the 2A being provided to the load. Now, the charger is operating in constant voltage (CV mode).

8. Disable LD2, then disable PS1. By default, the GUI will force the LTC4162’s telemetry on in a battery-powered state, so the data should continue to refresh. Observe a negative 2A on the IBAT meter, indicating that the emulated battery (PS2) is supplying power to the VOUT load.

Figure 1. Quick Start Setup for the DC2038A Demo Board

5Rev. 0

DEMO MANUAL DC2038A

CONFIGURING CELL COUNT

THEORY OF OPERATION

Cell count is configured by moving the JP1 and JP2 shunts on the DC2038A demo board. The CELLS1 and CELLS0 inputs on the LTC4162 are three-level pins which can be pulled to INTVCC, VCC2P5, or GND to configure the cell count.

Introduction to the DC2038A

The DC2038A demonstration circuit features the LTC4162, a step-down battery charger controller that includes a comprehensive telemetry system. In addition to the telem-etry system, the LTC4162 has two PowerPath FET con-trollers, and an MPPT function.

The LTC4162 is a CC/CV charger based on a synchronous step-down switching regulator. Charge voltage and cur-

Refer to Table 1 to configure CELLS1 and CELLS0 for a given cell count.

Table 1. Cell Count ConfigurationNUMBER OF CELLS

CELLS1 CELLS0Li-Ion LiFePO4 LEAD-ACID

1 1 3 (6V) INTVCC INTVCC

2 2 6 (12V) INTVCC VCC2P5

3 3 9 (18V) INTVCC GND

4 4 12 (24) VCC2P5 INTVCC

5 5 Disallowed VCC2P5 VCC2P5

6 6 Disallowed VCC2P5 GND

7 7 Disallowed GND INTVCC

8 8 Disallowed GND VCC2P5

Disallowed 9 Disallowed GND GND

Gray = Default Settings

Figure 2. Cell Count Configuration Jumpers

rent are configured in hardware, but can also be changed through I2C commands. JEITA temperature controlled charging can optionally be enabled to adjust charging parameters based on configurable temperature regions.

The telemetry system features a 16-bit ADC for monitor-ing the operating parameters of the charger. The behavior of the charger is controlled by on-die DACs, with only the power MOSFETs and current sense resistors external to the LTC4162.

6Rev. 0

DEMO MANUAL DC2038A

THEORY OF OPERATIONThe LTC4162 has two PowerPath FET controllers which drive external power MOSFETs. One FET is between the input voltage, VIN, and the system output node, VOUT. The other FET is between battery stack at BAT, and the system output node, VOUT. This allows either the input or bat-tery stack to power the system output, and also protects against power backfeeding to these sources.

The dynamic MPPT algorithm ensures that the LTC4162 is operating at the maximum power point condition, even when the MPPT operating point is changing. Thus, if a photovoltaic cell becomes shaded due to clouds, the LTC4162 will adjust operation to the shaded MPPT.

Refer to the LTC4162 data sheet for more detailed descrip-tions of these functions.

NTC Thermistor Measurement

The battery charger can monitor the battery temperature using a negative temperature coefficient (NTC) thermis-tor. This measurement can be used to suspend charging based on the battery’s temperature, or to employ a JEITA temperature qualified charging algorithm.

When the JP3 is set to EMULATE, the NTC connections are routed to an onboard electronic potentiometer which can be configured by the GUI to emulate the NTC resis-tor and emulate any temperature range as sensed by the LTC4162. This is configured from the factory to emulate room temperature and guarantee charging.

If JP3 is set to FIXED/EXT, then JP4 can be set to FIXED to route the NTC pin to an onboard 10kΩ resistor which emulates room temperature and guarantees charging. Otherwise, if JP4 is set to EXT, then the NTC pin is routed to the NTC turret for use with a real thermistor. In the EXT position, resistor placeholders are given to perform a dilute the thermistor network through hardware as described in the LTC4162 data sheet.

LTC4162 Programming SDK

To help with learning and development of LTC4162 appli-cations, there exists an SDK that makes interfacing with the LTC4162 as simple as possible. The package includes

a few example programs and comes fully equipped with register names and value formatting. Resources are given for both C code (with Arduino examples) and Python code. The SDK is so powerful and inclusive that the register list in the data sheet does not even need to be referenced dur-ing software development. This SDK can be downloaded from the LTC4162 product webpage.

Onboard Digital Interface

The LTC4162 demo board includes an Atmel SMART SAM D21 processor with an Arduino bootloader that makes it compatible with the Arduino IDE. This means users can prototype processor functionality directly in the free Arduino IDE. If the onboard firmware is changed, it can be restored at any time through the GUI (but the GUI will need to be launched manually as QuikEval will not recognize the board).

Debugging Custom Designs

The DC2038A’s default firmware and engineering GUI tab are designed to give a high speed debugging envi-ronment for LTC4162 operation. This functionality can be easily extended to interface with your own custom LTC4162 circuit design. To use the engineering GUI tab with a custom circuit board, simply leave the LTC4162 on the DC2038A unpowered and connect your own board to the SMBus interface accessible through header J3. DVCC can be safely back-driven with up to 5V to change the logic level.

Optional Demo Circuit Components

There are a few components on the demo board which may or may not be helpful in a particular application. Be sure to read the notes on the schematic for an explanation of why any nonstandard circuit components have been added to the demo board in an attempt to encompass all operating conditions in a single circuit.

7Rev. 0

DEMO MANUAL DC2038A

GUI APPLICATIONIntroduction to the GUI

The DC2038A GUI provides a graphical interface for some of the main features of the LTC4162. In addition, it pro-vides an advanced debugging interface that can be used in evaluating operation of the DC2038A as well as a cus-tomer’s own design.

To use the DC2038A, the PC must first have the proper software driver and GUI installed. Download the QuikEval software from www.analog.com and install the QuikEval software by running the executable ltcqev.exe. Follow the instructions to connect the DC2038A.

This manual provides an overview of the DC2038A GUI functions. For further GUI help, consult the Help Guide within the GUI (Window → Help Guide).

GUI Layout

The LTC4162 GUI is divided into tabs. Each tab shows a graphical representation of a group of associated reg-isters from the LTC4162 with the exception of the Engi-neering tab; this tab can instead show all registers and is intended to be used for lower-level development and debugging purposes.

Figure 3. The Dashboard Tab

8Rev. 0

DEMO MANUAL DC2038A

GUI APPLICATIONEach widget within the tabs of the GUI has a tooltip that will pop up if the mouse hovers over it for a few seconds. Tooltips contain detailed information about the register(s) associated with the widget such that the user does not need to consult the data sheet to understand a register.

Dashboard Tab

The Dashboard tab shows all the instantaneous state variables needed to monitor a charge cycle. The meters monitor all voltages and currents that are readable by the LTC4162. Charger state and configuration information

is also shown. By default, the GUI reads data from the LTC4162 every 200ms.

This tab also allows users to enable, clear, and set the limits for limit alerts associated with the system voltages, currents, and temperatures. The SMBALERT status is also shown (as detected by the onboard processor) and can be cleared as well.

JEITA Tab

The JEITA tab displays the JEITA settings including tem-perature region thresholds and the voltages and currents

Figure 4. The JEITA Tab

9Rev. 0

DEMO MANUAL DC2038A

GUI APPLICATIONfor each JEITA region. A plot shows these settings visu-ally and also shows the current operating temperature as measured by the NTC so that the JEITA-based charge conditions are known. The JEITA tab is not visible for lead-acid variants.

Engineering Tab

The Engineering tab is an advanced debugging tool which allows high speed reading of any register. Register group-ings can be displayed by activating the checkboxes in the Categories section.

To read a register, simply double-click the register name or value. To read all shown registers, double-click anywhere in the empty background space. To continuously read all shown registers, right-click and select Continuous Read from the context menu. When continuously reading, the GUI will poll all of the displayed registers as fast as pos-

sible. By default, a register entry will flash green when the new data is different from the previous data; this can be changed in the right-click context menu.

To write a register, right-click on a writable register and select Write… from the context menu. This will bring up a dialog with a few options for writing values.

For detailed information about a register, hovering over it for about a second will display the same tooltips as are visible in the other tabs of the GUI.

By default, register entries are displayed as formatted decimal values or Booleans. This can be changed to raw binary or hexadecimal notation by right-clicking on an entry and choosing Select Format.

Tabs can be added to the Engineering view by clicking the + button in the top-right corner. This allows the user to change between viewing different register groupings at ease.

Figure 5. The Engineering Tab

10Rev. 0

DEMO MANUAL DC2038A

PARTS LISTITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 2 C1, C10 CAP, 10µF, X5R, 6.3V, 20%, 0603 MURATA, GRM188R60J106ME47D

2 1 C2 CAP, 1µF, X5R, 16V, 10%, 0402 AVX, 0402YD105KAT2A

3 2 C3, C4 CAP, 0.1µF, X7R, 50V, 10%, 0402 AVX, 04025C104KAT2A

4 2 C5, C7 CAP, 10µF, X5R, 50V, 10%, 1206 TAIYO YUDEN, UMK316BBJ106KL-T

5 1 C6 CAP, 0.022µF, X7R, 16V, 10%, 0402 AVX, 0402YC223KAT2A

6 1 C9 CAP, 150µF, ALUM ELECT, 50V, 20%, 10 x 10.2mm RADIAL, FK SERIES, AEC-Q200

PANASONIC, EEEFK1H151P

7 4 C11, C12, C13, C14 CAP, 0.1µF, X5R, 10V, 20%, 0402 WURTH ELEKTRONIK, 885012105010

8 2 C15, C16 CAP, 22pF, NP0, 50V, 5%, 0402 WURTH ELEKTRONIK, 885012005057

9 2 C17, C18 CAP, 1µF, BJ, 10V, 20%, 0402 TDK, CGB2A1JB1A105M033BC

10 2 C19, C21 CAP, 0.01µF, X7R, 25V,10%, 0402 WURTH ELEKTRONIK, 885012205050

11 1 C20 CAP, 2.2µF, X5R, 10V, 20%, 0402 WURTH ELEKTRONIK, 885012105013

12 1 D1 LED, SUPER YELLOW, MILKY WHITE DIFF, 0603 LUMEX, SML-LX0603SYW-TR

13 1 D3 DIODE, SCHOTTKY, 30V, 200mA, SOT23 DIODES INC, BAT54C-7-F

14 1 D4 LED, BRIGHT GREEN, WATERCLEAR, 0603 WURTH ELEKTRONIK, 150060VS75000

15 3 D5, D6, D7 LED, YELLOW, WATERCLEAR, 0603 WURTH ELEKTRONIK, 150060YS75000

16 2 D8, D9 DIODE, SCHOTTKY, 40V, 500mA, USC (SOD-323) TOSHIBA, CUS05S40, H3F

17 6 E1, E4, E8, E11, E12, E15

TEST POINT, TURRET, 0.094", MTG HOLE MILL-MAX, 2501-2-00-80-00-00-07-0

18 6 E2, E3, E9, E10, E13, E14

CONN, BANANA JACK, FEMALE, THT, NON-INSULATED, SWAGE KEYSTONE, 575-4

19 3 E5, E6, E7 TEST POINT, TURRET, 0.064", MTG HOLE MILL-MAX, 2308-2-00-80-00-00-07-0

20 1 J1 CONN, µUSB 2.0, RCPT, 5 PINS, 1 PORT, REVERSE MOUNT, R/A HORZ, TYPE B, FLANGELESS

TE CONNECTIVITY, 1932788-1

21 1 J3 CONN, HDR, MALE, 1x5, 2.54mm, VERT, STR, THT SAMTEC, TSW-105-07-L-S

22 1 J4 CONN, HDR, MALE, 2x5, 1.27mm, VERT, STR, THT WURTH ELEKTRONIK, 62201021121

23 1 J5 CONN, SOCKET, RCPT FEMALE, 2x8, 1.27mm, VERT, STR, SMT, FLE SERIES

SAMTEC, FLE-108-01-G-DV

24 2 JP1, JP2 CONN, HDR, MALE, 2x3, 1.27mm, VERT, STR, SMT WURTH ELEKTRONIK, 62130621021

25 2 JP3, JP4 CONN, HDR, MALE, 1x3, 2mm, VERT, STR, THT, 10µ" AU SAMTEC, TMM-103-02-L-S

26 1 L1 IND, 6.8µH, PWR, SHIELDED, 20%, 9A, 20.80mΩ, 6.56mm × 6.36mm, AEC-Q200, XAL6060

COILCRAFT, XAL6060-682MEB

27 1 L2 IND, 30Ω AT 100MHz, BEAD, 6A, 10mΩ, 0805 TDK, MPZ2012S300AT000

28 1 LB1 LABEL SPEC, DEMO BOARD SERIAL NUMBER BRADY, THT-96-717-10

29 2 M1, M2 XSTR, MOSFET, N-CH, 40V, 14A, Power 33 (MLP 3.3Ax3.3) 8L ON SEMICONDUCTOR, FDMC8327L

30 4 M3, M4, M5, M6 XSTR, MOSFET, DUAL N-CH, 0.28A, SOT-563 DIODES INC, 2N7002VAC-7

31 1 M7 XSTR, MOSFET, P-CH, 20V, 4.2A, SOT23 DIODES INC, DMG2305UX-13

32 4 MH1, MH2, MH3, MH4

STANDOFF, NYLON, SNAP-ON, 0.50" KEYSTONE, 8833

33 1 PCB1 PCB, DC2038A GORILLA CIRCUITS, 600-DC2038A

34 4 R1, R27, R28, R31 RES,100kΩ, 5%, 1/16W, 0402, AEC-Q200 NIC, NRC04J104TRF

35 5 R2, R14, R15, R16, R17

RES, 2.2kΩ, 5%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW04022K20JNED

11Rev. 0

DEMO MANUAL DC2038A

PARTS LISTITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

36 5 R3, R4, R19, R20, R22

RES, 4.7kΩ, 5%, 1/16W, 0402, AEC-Q200 NIC, NRC04J472TRF

37 1 R5 RES, 10kΩ, 5%, 1/10W, 0603, AEC-Q200 NIC, NRC06J103TRF

38 1 R6 RES, 63.4kΩ, 1%, 1/10W, 0603, AEC-Q200 VISHAY, CRCW060363K4FKEA

39 2 R7, R8 RES,10kΩ, 1%, 1/10W, 0603, AEC-Q200 VISHAY, CRCW060310K0FKEA

40 1 R9 RES, 2.49Ω, 1%, 3/4W, 1206, PULSE PROOF HIGH PWR, AEC-Q200 VISHAY, CRCW12062R49FKEAHP

41 1 R10 RES, 1Ω, 5%, 1/16W, 0402 KOA SPEER, RK73B1ETTP1R0J

42 3 R11, R12, R13 RES, 301Ω, 1%, 1/10W, 0603, AEC-Q200 PANASONIC, ERJ3EKF3010V

43 1 R18 RES, 10kΩ, 5%, 1/16W, 0402 YAGEO, RC0402JR-0710KL

44 1 R21 RES, 1MΩ, 5%, 1/16W, 0402 VISHAY, CRCW04021M00JNED

45 1 R23 RES, 196kΩ, 1%, 1/10W, 0603 VISHAY, CRCW0603196KFKEA

46 1 R24 RES, 115kΩ, 1%, 1/10W, 0603 NIC, NRC06F1153TRF

47 2 R25, R26 RES, 10Ω, 1%, 1/16W, 0402, AEC-Q200 NIC, NRC04F10R0TRF

48 1 R29 RES, 0Ω, 1/10W, 0603, 1A, AEC-Q200 ROHM, MCR03EZPJ000

49 2 RS1, RS2 RES, 0.01Ω, 1%, 1/3W, 0603, LONG-SIDE TERM, SENSE SUSUMU, PRL0816-R010-F-T1

50 1 STNCL1 TOOL, STENCIL, 700-DC2038A ANALOG DEVICES, 830-DC2038A

51 1 U1 IC, 35V/3.2A MULTI-CELL STEP DOWN BATTERY CHARGER WITH POWERPATH AND I2C TELEMETRY, QFN-28(UFD) 4mm × 5mm

ANALOG DEVICES, LTC4162EUFD-xxx#PBF (IC VARIES BETWEEN DEMO CIRCUITS)

52 1 U2 IC, ISOLATED USB TRANSCEIVER, BGA-44 ANALOG DEVICES, LTM2884CY#PBF

53 1 U3 IC, MEMORY, MCU, 32BIT, 256kB FLASH, TQFP48 MICROCHIP, ATSAMD21G18A-AUT

54 1 U4 IC, REG LDO ADJ, 100mA, TSOT23-5 ANALOG DEVICES, LT1761ES5-BYP#PBF

55 1 U5 IC, POT DGTL, 100kΩ, 256POS, MSOP-10, NONVOLATILE, I2C-COMPATIBLE

ANALOG DEVICES, AD5259BRMZ100-R7

56 2 XJP1, XJP2 CONN, SHUNT, FEMALE, 1x2, 1.27mm WURTH ELEKTRONIK, 622002115121

57 2 XJP3, XJP4 CONN, SHUNT, FEMALE, 2 POS, 2mm WURTH ELEKTRONIK, 60800213421

58 1 Y1 CRYSTAL, 32.768kHz, 12.5pF, 3.2x1.5mm SMD ABRACON, ABS07-32.768kHz-4-T

12Rev. 0

DEMO MANUAL DC2038A

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A-P

DC20

38A-

QDC

2038

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FFSM

LTC4

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LTC4

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DC20

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JDC

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A-K

DC20

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N

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1. RE

SIST

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2.9V

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GND

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OPT

OPT

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3

NOTE

3

NOTE

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ODE

& RE

SIST

OR P

AIRS

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25 &

D9/R

26 P

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E IN

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NT IN

RUSH

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COM

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RSER

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RPAR

ALLE

L

NOTE

5:R2

9 & R

30 C

AN O

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Y BE

POP

ULAT

ED T

O DI

LUTE

THE

THER

MIS

TOR

FOR

NTC

MOD

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H A

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VAL

UE N

OT E

QUAL

TO

3490

K.

NOTE

2:R2

7 & R

28 A

RE R

EQUI

RED

TO R

EDUC

E NO

ISE

INTO

THE

CEL

LS1 A

NDCE

LLS0

PIN

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E TO

THE

LON

G RE

TURN

PAT

H US

ED O

N TH

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MO

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R EV

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S. IN

MOS

T AP

PLIC

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NS,

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RE T

HESE

PIN

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TO IN

TVcc

, VCC

2P5,

OR G

NDW

ITH

SHOR

T RO

UTIN

G, T

HESE

RES

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RS W

ILL

NOT

BE N

ECES

SARY

.NO

TE 2

NOTE

4:D2

CAN

BE

OPTI

ONAL

LY P

OPUL

ATED

TO

IMPR

OVE

CHAR

GE C

URRE

NTDE

LIVE

RY IN

SIN

GLE-

CELL

LI-I

ON /

LIFE

PO4 C

ASES

WHE

RE T

HE V

INVO

LTAG

E IS

NEA

R TH

E BA

TTER

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LTAG

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LOW

-LEA

KAGE

, LOW

VF

SCHO

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DIO

DE C

AN B

E PL

ACED

IN C

LOSE

PRO

XIM

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TO T

HEIN

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AND

BOO

ST P

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TERN

AL B

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DIO

DEAN

D GI

VE A

WID

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DRO

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MAR

GIN.

NOTE

4

NOTE

5

NOTE

1

DVCC SC

L

SDA

SMBA

LERT

INTV

cc

NTCw

iper

NTCB

IAS

INTV

cc

DATE

:

IC N

O.

SHEE

TOF

TITL

E: D

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CIRC

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MAT

IC,

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OVAL

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CUST

OMER

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LINE

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OLOG

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38A_

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A_RE

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1 Tues

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DATE

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OVAL

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CUST

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MH2

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R25

10

TP2

R4 4.7k 5%

13Rev. 0

DEMO MANUAL DC2038A

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

SCHEMATIC DIAGRAM5 5

4 4

3 3

2 2

1 1

DD

CC

BB

AA

NOTE

S: U

NLES

S OT

HERW

ISE

SPEC

IFIE

D1.

RESI

STOR

S: O

HMS,

0402

, 1%

, 1/16

W2.

CAPA

CITO

RS:

0402

, 10%

, 50V

Clos

eto J1

.1DV

CCSD

ASC

L

GND

SMBA

LERT

35V/

3.2A

MULT

I-CEL

L ST

EP-D

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BATT

ERY

CHAR

GER

WIT

H PO

WER

PATH

AND

I2C

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SEE

PAGE

1 TA

BLE

OPT

RxTx

COMM

STAT

US

PB10

PB11

PA12

PB23

PB22

PA5

PA6

PA7

PA8

PA9

PA10

PA11

PA13

PA14

PA15

PA16

PA17

PA18

PA19

PA20

PA21

PA4

PB8

PB9

5%5%

3.3V

5V5V

Vcc

VCCi

n

Vcc_

MCU

Vcc_

MCU

Vcc_

MCU

Vcc

Vcc

Vcc_

MCU

Vcc_

MCU

Vcc_

MCU

Vcc_

MCU

Vcc_

MCU

Vcc

Vcc

Vcc_

MCU

SMBA

LERT

NTCB

IAS

NTCw

iper

SMBA

LERT

DVCC

SDA

SCL

DVCC SD

ASC

L

DVCC

SDA

SCL

SMBA

LERT

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cc

DATE

:

IC N

O.

SHEE

TOF

TITL

E: D

EMO

CIRC

UIT

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IC,

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OVAL

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22

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710-

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170

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Mond

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, 201

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g.com

22

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710-

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170

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ctob

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DATE

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g.com

22

N. C

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ante

ly

SEE

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710-

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A_RE

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Mond

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8

8.5x1

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C10

10uF

6.3V

0603

J31 2 3 4 5

C13

0.1u

FC1

10.

1uF

100k

U5 AD52

59BR

MZ1

00-R

71W

AD0

2

AD1

3

SDA

4SC

L5

VLOG

IC6

GND

7

VDD

8

9B

10A

C17

1uF

D7 YELL

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C20

2.2u

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R18

10k

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C19

0.01

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D4BR

IGHT

GRE

EN

C16

22pF

R14

2.2k 5%

R23

196k

J2 6130

2421

121

11

22

33

44

55

66

77

88

99

1010

1111

1212

1313

1414

1515

1616

1717

1818

1919

2020

2121

2222

2323

2424

C18

1uF

R21

1M 5%

R13

301

0603

D3BA

T54C

1

3

2

J5

FLE-

108-

01-G

-DV

12

34

56

78

910

1112

1314

1516

M5A

2N70

02VA

C-7

R11

301

0603

C14

0.1u

FC1

20.

1uF

D5 YELL

OW

M3B

2N70

02VA

C-7

R19

4.7k

5%R1

52.

2k 5%

R12

301

0603

D6YE

LLOW

R24

115k

M4B

2N70

02VA

C-7

R31

100k

5%

U3AT

SAM

D21G

18A-

AUT

PA0/

XIN3

2/EI

C/SC

OM1P

AD0/

TC2

1

PA1/

XOUT

32/E

IC/S

COM

1PAD

1/TC

22

PA2/

EIC/

AIN0

3PA

3/EI

C/RE

F/AI

N14

GNDANA 5

VDDA

NA6

PB8/

EIC/

AIN2

/SCO

M4P

AD0/

TC4

7PB

9/EI

C/AI

N3/S

COM

4PAD

1//T

C48

PA4/

EIC/

REF/

AIN4

/SCO

M0P

AD0/

TC0

9PA

5/EI

C/AI

N5/S

COM

0PAD

1/TC

010

PA6/

EIC/

AIN6

/SCO

M0P

AD2/

TC1

11PA

7/EI

C/AI

N7/S

COM

0PAD

3/TC

112

PA8/

I2C/

AIN1

6/SC

OM2P

AD0+

/TC0

13PA

9/I2

C/EI

C/AI

N17/

SCOM

2PAD

1+/T

C014

PA10

/EIC

/AIN

18/S

COM

2PAD

2+/T

C115

PA11

/EIC

/AIN

19/S

COM

2PAD

3+/T

C116

VDDI

O117

GND1 18

PB10

/EIC

/SCO

M4P

AD2/

TC5

19PB

11/E

IC/S

COM

4PAD

3/TC

520

PA12

/I2C/

EIC/

SCOM

2PAD

0+/T

C221

PA13

/I2C/

EIC/

SCOM

2PAD

1+/T

C222

PA14

/XIN

/EIC

/SCO

M2P

AD2+

/TC3

23PA

15/X

OUT/

EIC/

SCOM

2PAD

3+/T

C324

PA16

/I2C/

EIC/

SCOM

1PAD

0+/T

C225

PA17

/I2C/

EIC/

SCOM

1PAD

1+/T

C226

PA18

/EIC

/SCO

M1P

AD2+

/TC3

27PA

19/E

IC/S

COM

1PAD

3+/T

C328

PA20

/EIC

/SCO

M5P

AD2+

29PA

21/E

IC/S

COM

5PAD

3+30

PA22

/I2C/

EIC/

SCOM

5PAD

0+/T

C431

PA23

/I2C/

EIC/

SCOM

5PAD

1+/T

C432

PA24

/EIC

/SCO

M3P

AD2+

/TC5

33PA

25/E

IC/S

COM

3PAD

3+/T

C534

GND2 35

VDDI

O236

PB22

/EIC

/SCO

M5P

AD2

37PB

23/E

IC/S

COM

5PAD

338

PA27

/EIC

39

40 RESE

TNPA

28/E

IC41

GND3 42

VDDC

ORE1

43

VDDI

N44

PA30

/EIC

/SCO

M1P

AD2/

TC1

45PA

31/E

IC/S

COM

1PAD

3/TC

146

PB2/

EIC/

AIN1

0/SC

OM5P

AD0

47

PB3/

EIC/

AIN1

1/SC

OM5P

AD1

48

M4A

2N70

02VA

C-7

C15

22pF

R16

2.2k 5%

M6B

M6A

2N70

02VA

C-7

J41

23 5

64

78 10

9

M3A

2N70

02VA

C-7

R20

4.7k

5%

R22

4.7k

5%

M7

DMG2

305U

X3

1

2

J1

uUSB

2.0

1932

788-

1

VBUS

1

D-2

D+3

ID4

GND

5

GND 6GND 7

U4 LT17

61-S

5-BY

P

IN1

GND

2

BYP

3

ADJ

4

OUT

5

U2 LTM

2884

-BGA

D1+

A2D1

-A1

SPND

-PW

RA3

ONA4

VLO

A5

GND

B1GN

DB2

GND

B3GN

DB4

GND

B5GN

DB6

GND

B7GN

DB8

GND

B9GN

DB1

0GN

DB1

1

GND2

K1GN

D2K2

GND2

K3GN

D2K4

GND2

K5GN

D2K6

GND2

K7GN

D2K8

GND2

K9GN

D2K1

0GN

D2K1

1

GND2

L3GN

D2L4

GND2

L6GN

D2L7

GND

A6

VBUS

A7VC

CA8

VCC

A9VC

CA1

0VC

CA1

1

D2-

L1D2

+L2

VLO2

L5VC

C2L8

VCC2

L9VC

C2L1

0VC

C2L1

1

L230

OHM

S @

100M

hz1

2

R17

2.2k 5%

M5B

C21

0.01

uF

R10

1 5%

Y1 32.7

68kH

z

12

TP3

SCL

SDA

RESE

TN

RESE

TN

14Rev. 0

DEMO MANUAL DC2038A

ANALOG DEVICES, INC. 2019

05/19www.analog.com

ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.

Legal Terms and Conditions By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”) and Analog Devices, Inc. (“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal, temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and agrees that the Evaluation Board is provided for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term “Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer; all rights not expressly granted herein, including ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI. Customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board. Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS” AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF THE EVALUATION BOARD, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of Massachusetts (excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed.