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1 Introduction

1.1 EVM Features

User's Guide

SLUU291A – August 2007 – Revised April 2008

bq2430x/1x/8x DSG EVM (HPA245) for Li+ Charger

Front-End Protection IC

The bq2430x/1x/8x evaluation module is a complete charger module for evaluating a charger front-end

protection and charger solution using the bq2430x/1x/8x and bq24080 devices. This user's guide presents

test summary information, printed-circuit board layout guidelines, bill of materials, board layout, and

schematics.

Contents

1 Introduction ................................................................................................................... 1

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

3 PCB Layout Guideline ....................................................................................................... 7

4 Bill of Materials, Board Layout, and Schematics ........................................................................ 8

List of Figures

1 Original Test Setup for HPA245 (bq2430x/1x/8x DSG EVM) .......................................................... 4

2 Charger IC Test Setup for HPA245 (bq2430x/1x/8x DSG EVM) ...................................................... 6

3 Chipset Test Setup for HPA245 (bq2430x/1x/8x DSG EVM) .......................................................... 6

4 Top Layer .................................................................................................................... 10

5 Bottom Layer ................................................................................................................ 10

6 Top Silkscreen .............................................................................................................. 10

7 Top Assembly ............................................................................................................... 11

• Evaluation module for bq2430x, bq2431x, and bq2438x DSG

• Evaluation module for bq24080 charger integrated circuit (IC)

• Evaluation module for bq2430x/1x/8x and bq24080 chipset solution

• Input operating range for bq2430x/1x/8x 4.5 V–26 V

• Input operating range for bq24080 4.5 V–6.5 V

• Input overvoltage protection

• Input overcurrent protection

• Battery overvoltage protection

• Input reverse voltage protection for bq2430x

• LED indication for status signals

• Test points for key signals available for testing purpose. Easy probe hook-up

• Jumpers available. Easy to change connections

SLUU291A – August 2007 – Revised April 2008 bq2430x/1x/8x DSG EVM (HPA245) for Li+ Charger Front-End Protection IC 1

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Summary of content (14 pages)

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User's Guide SLUU291A – August 2007 – Revised April 2008 bq2430x/1x/8x DSG EVM (HPA245) for Li+ Charger Front-End Protection IC The bq2430x/1x/8x evaluation module is a complete charger module for evaluating a charger front-end protection and charger solution using the bq2430x/1x/8x and bq24080 devices. This user's guide presents test summary information, printed-circuit board layout guidelines, bill of materials, board layout, and schematics. 1 2 3 4 Contents Introduction ...............................
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Introduction 1.2 www.ti.com General Description The bq2430x/1x/8x evaluation module is a complete charger module for evaluating a charger front-end protection and charger solution using the bq2430x/1x/8x and bq24080 devices. It is designed to deliver up to 200 mA (bq2430x) or 700 mA (bq2431x/8x) of charge current to Li-ion or Li-polymer applications. The charger front-end protection current is designed to 300 mA (bq2430x) or 1000 mA (bq2431x) or no limit (bq2438x).
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Test Summary www.ti.com 2 Test Summary 2.1 Definitions This procedure details how to configure the evaluation board. On the test procedure, the following naming conventions are followed. See the schematic for details. VXXX : External voltage supply name (VIN, VBAT, VOUT) LOADW: External load name (LOADR, LOADI) V(TPyyy) : Voltage at internal test point TPyyy. For example, V(TP1) means the voltage at TP1. V(Jxx): Voltage at jack terminal Jxx. V[TP(XXXXX)]: Voltage at test point XXXXX.
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Test Summary 2.2.5 www.ti.com Wire Gauge All wires connected to EVM input power supply and output load should use at least AWG 22. The maximum current is up to 1 A. 2.3 Equipment Setup Set the power supply #1 for 0 V ± 100 mVDC, 2 ± 0.1-A current limit and then disable the output. Connect the output of power supply #1 to J1 (DC+, DC–) Connect a voltage meter across J1 (DC+, DC–). Set the power supply #2 for 3.7 V ± 100 mVDC, 0.2 ± 0.1-A current limit and then disable the output.
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www.ti.com Test Summary V. Measure → V(J2(OUT)) = 0 V ± 500 mV Observe → D2 on, D3 off. 6. Uninstall JMP3 (enable U1). Measure → V(J2(OUT)) = 5.5 V ± 200 mV (For HPA245-001, -002, -009 only) Measure → V(J2(OUT)) = 4.5 V ± 200 mV (For HPA245-003 only) Measure → V(J2(OUT)) = 5 V ± 200 mV (For HPA245-004, -005, -006, -007, -008, -010, -011, 012, -013 only) Observe → D2 on, D3 on. 2.4.2 CFE Input Overvoltage Protection 1. (For HPA245-001, -002, -003, -004, -013 only) Increase the voltage of PS#1 to 11V ±0.
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Test Summary www.ti.com 6. JMP1: ON, JMP2: ON, JMP3: ON, JMP4: ON, JMP5: ON, JMP6: ON, JMP7: ON, JMP8: OFF 7. After the preceding steps, the test setup for HPA245 (bq2430x/1x/8x DSG EVM) is shown in Figure 2. Power Supply #1 V FAULT BAT+ DCOUT DCCHG IN J3 J2 JMP8 JMP1 JMP2 JMP3 JMP4 JMP5 JMP6 JMP7 J1 J4 U1 DC+ U2 BAT+ V Ibat I BAT- DC- Load #2 APPLICATION CIRCUIT HPA245 BQ2430x/1x/8x DSG EVM Figure 2. Charger IC Test Setup for HPA245 (bq2430x/1x/8x DSG EVM) 2.4.6 5. 6.
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www.ti.com PCB Layout Guideline 2.4.8 CFE and Charge IC Chipset Test 1. Enable output of Load #2. 2. Enable output of PS#1. Measure → Ibat = 200 mA ±20 mA (For HPA245-001, -002, -003, -004, -013 only). Measure → Ibat = 700 mA ±70 mA (For HPA245-005, -006, -007, -008, -009, -010, -011, -012 only). Observe → D2 on, D3 on, D4 on, D5 off, D6 on. 3 PCB Layout Guideline 1. It is critical that the exposed power pad on the backside of the bq2430x/1x/8x package be soldered to the PCB ground.
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Bill of Materials, Board Layout, and Schematics www.ti.com 4 Bill of Materials, Board Layout, and Schematics 4.
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Bill of Materials, Board Layout, and Schematics www.ti.com 4.
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Bill of Materials, Board Layout, and Schematics 4.3 www.ti.com Board Layout Figure 4. Top Layer Figure 5. Bottom Layer Figure 6.
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Bill of Materials, Board Layout, and Schematics www.ti.com Figure 7.
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Bill of Materials, Board Layout, and Schematics 4.4 www.ti.com Schematics The bq2430x/1x/8x DSG EVM schematic follows.
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EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.