Texas Instruments BQ25172EVM Manuel utilisateur

User’s Guide

BQ25172EVM Evaluation Module

ABSTRACT

This user’s guide describes the characteristics, operation, and use of the BQ25172EVM evaluation module

(EVM). This EVM is designed to help the user evaluate and test the various operating modes of the BQ25172.

This user’s guide includes setup instructions for the hardware and software, a schematic diagram, a bill of

materials (BOM), and PCB layout drawings for the evaluation module.

Throughout this user's guide, the abbreviations EVM, BQ25172EVM, BMS033, and the term evaluation module

are synonymous with the BMS033 evaluation module, unless otherwise noted.

Table of Contents

1 Introduction.............................................................................................................................................................................2

1.1 Printed Circuit Board Assembly......................................................................................................................................... 2

1.2 I/O Descriptions..................................................................................................................................................................2

2 Test Summary......................................................................................................................................................................... 3

2.1 Equipment.......................................................................................................................................................................... 3

2.2 Cautions............................................................................................................................................................................. 3

2.3 Test Instructions................................................................................................................................................................. 3

3 Board Layout, Schematic, and Bill of Materials...................................................................................................................4

3.1 Board Layout......................................................................................................................................................................4

3.2 Schematic.......................................................................................................................................................................... 7

3.3 Bill of Materials...................................................................................................................................................................8

4 Revision History................................................................................................................................................................... 12

Trademarks

All trademarks are the property of their respective owners.

WARNING

Hot surface! Contact may cause burns. Do not touch!

Some components may reach high temperatures >55°C when the board is powered on. The user must

not touch the board at any point during operation or immediately after operating, as high temperatures

may be present.

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BQ25172EVM Evaluation Module 1

1 Introduction

The Texas Instruments BQ25172EVM is a NiMH chemistry battery charger IC for single and multi cell

applications. Charging voltage can be adjusted using external resistors on VSET. Charging current can be set

from 60mA to 600mA with an external resistor on ISET.

1.1 Printed Circuit Board Assembly

The BQ25172EVM PCB contains the BQ25172 IC, LDO TPS7B8133 and support circuits. This board contains

several jumpers and connectors. S1 (VSET) allows selected output voltages to be programmed. S2 (TMR)

allows the charge timer to be configured. The R9 resistor allows a wide range of adjustment of VSET. R22 can

be used to change ISET value (fast charge current). R19 can be used to adjust TS, the battery temp sensor to

simulate hot and cold fault.

1.2 I/O Descriptions

Table 1-1 lists the input and output connections available on this EVM and their respective descriptions.

Table 1-1. EVM I/O Connections

I/O Connector Description

J1 – VIN / GND Input voltage from external power supply, recommended 5V. Max operating input

voltage is 6.6V, OVP trip point. Max input voltage is 30V while in OVP.

J2 – OUT (BAT+) / GND (BAT-) / GND / TS Battery connection, TS should be 10k NTC but not needed.

JP1 – VSET ADJ Disable R9, default is installed.

JP2 – REG / IN / OUT Source voltage for housekeeping regulator, U2. Default Input voltage IN.

JP3 – TMR Connection to TMR pin

JP4 – ISET Sets Fast Charge Current. Fixed=400mA ADJ= R22 range 60mA to 600mA

JP5 - STAT LED Default setting is ON.

JP6 – TS NTC temp sensor. Fixed=10k (safe) ADJ=R19 range from 0 to 50k ohms. Default Fixed.

JP7 - TMR ADJ Bypasses R18 for TMR connection to S2

JP8 Not used, do not install

JP9 Not used, do not install

Table 1-2 lists the S1 switch positions for VSET and their respective descriptions. Use only one postion ON, do

not combine.

Table 1-2. VSET S1 Switch Positions

Position / RX / Value NiMH Configuration

#1 / R1 / 27k ohm 2-Cell + Intermittent

#2 / R2 / 24k ohm 3-Cell

#3 / R3 / 18k ohm 3-Cell + Intermittent

#4 / R4 / 11k ohm 4-Cell + Intermittent

#5 / R5 / 6.2k ohm 5-Cell + Intermittent

#6 / R6 / 4.7k ohm 6-Cell

#7 / R7 / 3.6k ohm 6-Cell + Intermittent

#8 / R8 / 0 ohm Short Circuit – No Charge

Table 1-3. TMR S2 Switch Positions

Position / RX / Value Charge Timer (HR)

#11 / R11 / 36k ohm 4hr

#12 / R12 / 18.2k ohm 10hr

#13 / R13 / 6.2k ohm 18hr

#14 / R14 / 0 ohm 0hr (Short-Circuit)

Introduction www.ti.com

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2 Test Summary

This section describes the jumpers and connectors on the EVM as well as how to properly connect, setup, and

use the BQ25172EVM.

2.1 Equipment

This section includes a list of supplies required to perform tests on this EVM.

1. Battery simulator such as Keithley 2400 or equilvalent. A real NiMH battery may also be used.

2. Power supply, 5V 1A input. Note that unit can operate up to 6.6V input.

3. Voltage meter and current meter.

2.2 Cautions

To prevent possible damage to battery under test verify that charging conditions of the cell are not exceeded.

Check max charge voltage and current.

Power dissipation of the device can be exceeded with too high an input to output voltage drop and current.

Thermal regulation begins reducing current at 125 °C, at 150 °C device will shut off.

Device can get hot during high input-to-output voltage drop and high current conditions. Use caution when

handling the board.

2.3 Test Instructions

In order for this EVM to operate properly, the following components must be connected and properly configured.

1. Set input power supply to 5V and Battery Simulator to 2.2V with compliance to support 800mA. Turn off

Supply and Battery Simulator.

2. Connect input voltages to J1 and Battery Simulator to J2 on the EVM.

3. Configure all EVM jumpers to factory setting, refer to table below.

4. Turn on all supplies and loads

a. 5V Input supply current limit should be greater than 500mA

b. Out voltage should be 2.2V and charge current 400mA

5. Simulate battery completing charge by increasing Battery Simulator voltage to 2.4V

a. Current will decrease to 0mA

Table 2-1. Jumper Factory Setting

I/O Connector Factory Setting

JP1 Installed

JP2 IN

JP3 Installed

JP4 Fixed

JP5 Installed

JP6 Fixed

JP7 N/A

JP8 N/A

JP9 N/A

S1 Position 1

S2 N/A

Note: IN, ON, Fixed are positions of a 3 pin header. If it is a 2 pin header then it is installed or not installed.

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BQ25172EVM Evaluation Module 3

3 Board Layout, Schematic, and Bill of Materials

3.1 Board Layout

The board layout is shown in Figure 3-1 to Figure 3-6.

Figure 3-1. Top Overlay

Figure 3-2. Top Solder

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Figure 3-3. Top Layer

Figure 3-4. Bottom Layer

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BQ25172EVM Evaluation Module 5

Figure 3-5. Bottom Solder

Figure 3-6. Bottom Overlay

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3.2 Schematic

The BQ25172EVM schematic is shown in Figure 3-7.

Figure 3-7. BQ25172EVM Schematic

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BQ25172EVM Evaluation Module 7

3.3 Bill of Materials

The bill of materials is shown in the following table.

Table 3-1. Bill of Materials

Designator Quantity Manufacturer Value Description Package

Reference Part Number Manufacturer Alternate Part

Number1

Alternate

Manufacturer1

!PCB? 1 Any Printed Circuit Board BMS033 Any

C1, C3 2 MuRata 1uF CAP, CERM, 1 µF, 50

V,+/- 20%, X5R, AEC-

Q200 Grade 3, 0603

0603 GRT188R61H105ME13D MuRata

C2, C4 2 MuRata 1uF CAP, CERM, 1 uF, 16

V, +/- 10%, X7R, AEC-

Q200 Grade 1, 0603

0603 GCM188R71C105KA64D MuRata

D2 1 Lite-On Green LED, Green, SMD Body1.6x0.8mm LTST-C193TGKT-5A Lite-On

H1, H2, H3,

4 3M Bumpon, Hemisphere,

0.44 X 0.20, Clear

Transparent

Bumpon

SJ-5303 (CLEAR) 3M

J1 1 On-Shore

Technology

Terminal Block, 3.5mm

Pitch, 2x1, TH

7.0x8.2x6.5mm ED555/2DS On-Shore

Technology

J2 1 On-Shore

Technology

Terminal Block, 3.5mm

Pitch, 4x1, TH

14x8.2x6.5mm ED555/4DS On-Shore

Technology

JP1, JP3,

JP5, JP7

4 Sullins Connector

Solutions

Header, 100mil, 2x1,

Tin, TH

Header, 2 PIN,

100mil, Tin

PEC02SAAN Sullins Connector

Solutions

JP2, JP4, JP6 3 Sullins Connector

Solutions

Header, 100mil, 3x1,

Tin, TH

Header, 3 PIN,

100mil, Tin

PEC03SAAN Sullins Connector

Solutions

LBL1 1 Brady Thermal Transfer

Printable Labels,

0.650" W x 0.200" H -

10,000 per roll

PCB Label 0.650 x

0.200 inch

THT-14-423-10 Brady

R1 1 Yageo 27.0k RES, 27.0 k, 1%, 0.1

W, 0603

0603 RC0603FR-0727KL Yageo

R2 1 Yageo 24.0k RES, 24.0 k, 1%, 0.1

W, 0603

0603 RC0603FR-0724KL Yageo

R3 1 Yageo 18.0k RES, 18.0 k, 1%, 0.1

W, 0603

0603 RC0603FR-0718KL Yageo

R4 1 Yageo 11.0k RES, 11.0 k, 1%, 0.1

W, 0603

0603 RC0603FR-0711KL Yageo

R5, R13 2 Yageo 6.20k RES, 6.20 k, 1%, 0.1

W, 0603

0603 RC0603FR-076K2L Yageo

R6 1 Yageo 4.70k RES, 4.70 k, 1%, 0.1

W, 0603

0603 RC0603FR-074K7L Yageo

R7 1 Yageo 3.60k RES, 3.60 k, 1%, 0.1

W, 0603

0603 RC0603FR-073K6L Yageo

Board Layout, Schematic, and Bill of Materials www.ti.com

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Table 3-1. Bill of Materials (continued)

Designator Quantity Manufacturer Value Description Package

Reference Part Number Manufacturer Alternate Part

Number1

Alternate

Manufacturer1

R8, R14 2 Yageo 0 RES, 0, 5%, 0.1 W,

0603

0603 RC0603JR-070RL Yageo

R9, R18 2 Bourns 50k Ohm Trimmer

Potentiometer, Lead

Sealed Type Multiturn

PV37 Series, TH

6.71x4.5mm PV37W503C01B00 Bourns

R10 1 Yageo 750 RES, 750, 1%, 0.1 W,

0603

0603 RC0603FR-07750RL Yageo

R11 1 Yageo 36.0k RES, 36.0 k, 1%, 0.1

W, 0603

0603 RC0603FR-0736KL Yageo

R12 1 Yageo 18.2k RES, 18.2 k, 1%, 0.1

W, 0603

0603 RC0603FR-0718K2L Yageo

R19, R22 2 Bourns 20k Trimmer, 20k ohm,

0.25W, TH

4.5x8x6.7mm 3266W-1-203LF Bourns

R20 1 Vishay-Dale 10.0k RES, 10.0 k, 1%, 0.1

W, AEC-Q200 Grade

0, 0603

0603 CRCW060310K0FKEA Vishay-Dale

R21 1 Vishay-Dale 301 RES, 301, 1%, 0.1 W,

AEC-Q200 Grade 0,

0603

0603 CRCW0603301RFKEA Vishay-Dale

R24 1 Yageo 1.00k RES, 1.00 k, 1%, 0.1

W, 0603

0603 RC0603FR-071KL Yageo

S1 1 Grayhill Switch, SPST 8Pos,

Rocker, TH

9.65X8X22.4mm 76SB08ST Grayhill

S2 1 Grayhill DIP Switch, SPST

4Pos, Slide, TH

DIP Switch, 4 Pos 78B04ST Grayhill

SH-JP1, SH-

JP2, SH-JP3,

SH-JP4, SH-

JP5, SH-JP6,

SH-JP7

7 Samtec 1x2 Shunt, 100mil, Gold

plated, Black

Shunt SNT-100-BK-G Samtec 969102-0000-

TP1, TP2,

TP3, TP4,

TP5, TP6,

TP7, TP8,

TP9, TP10,

TP12, TP13,

TP14

13 Harwin Test Lead clips and

hooks, SMT

Test Point, Body

3.25x1.65mm

S1751-46 Harwin

U1 1 Texas Instruments BQ25172DSG WSON8 BQ25172DSG Texas

Instruments

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Table 3-1. Bill of Materials (continued)

Designator Quantity Manufacturer Value Description Package

Reference Part Number Manufacturer Alternate Part

Number1

Alternate

Manufacturer1

U2 1 Texas Instruments Automotive 150-mA

high-voltage ultra-low-

IQ low-dropout (LDO)

linear regulator,

DRV0006A (WSON-6)

DRV0006A TPS7B8133QDRVRQ1 Texas

Instruments

Texas

Instruments

C5 0 AVX 100pF CAP, CERM, 100 pF,

50 V, +/- 1%, C0G/

NP0, 0402

0402 04025A101FAT2A AVX

C6 0 MuRata 1uF CAP, CERM, 1 µF, 50

V,+/- 20%, X5R, AEC-

Q200 Grade 3, 0603

0603 GRT188R61H105ME13D MuRata

C7 0 MuRata 1uF CAP, CERM, 1 uF, 16

V, +/- 10%, X7R, AEC-

Q200 Grade 1, 0603

0603 GCM188R71C105KA64D MuRata

C8 0 MuRata 4700pF CAP, CERM, 4700 pF,

50 V, +/- 10%, X5R,

0603

0603 GRM188R61H472KA01D MuRata

D1 0 Lite-On Green LED, Green, SMD Body1.6x0.8mm LTST-C193TGKT-5A Lite-On

FID1, FID2,

FID3

0 N/A Fiducial mark. There

is nothing to buy or

mount.

N/A N/A N/A

JP8, JP9 0 Sullins Connector

Solutions

Header, 100mil, 3x1,

Tin, TH

Header, 3 PIN,

100mil, Tin

PEC03SAAN Sullins Connector

Solutions

R15, R17 0 Yageo America 604k RES, 604 k, 0.1%,

0.125 W, 0805

0805 RT0805BRD07604KL Yageo America

R16 0 Bourns 500 kOhms 0.25W,

1/4W PC Pins

Through Hole Trimmer

Potentiometer Cermet

12 Turn Top

Adjustment

PTH_3 PV37W504C01B00 Bourns

R23 0 Yageo 1.00k RES, 1.00 k, 1%, 0.1

W, 0603

0603 RC0603FR-071KL Yageo

R25 0 Vishay-Dale 10.0k RES, 10.0 k, 1%, 0.1

W, AEC-Q200 Grade

0, 0603

0603 CRCW060310K0FKEA Vishay-Dale

R26 0 Vishay-Dale 2.00k RES, 2.00 k, 1%, 0.1

W, AEC-Q200 Grade

0, 0603

0603 CRCW06032K00FKEA Vishay-Dale

SH-JP8, SH-

JP9

0 Samtec 1x2 Shunt, 100mil, Gold

plated, Black

Shunt SNT-100-BK-G Samtec 969102-0000-

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