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User's Guide
SLUU455–October 2010
bq24351EVM for Li-Ion Charger Front-End Protection IC
This user's guide describes the features, setup, and operation of the bq24351EVM evaluation module.
Included are the bill of materials, board layout, and schematic.
Contents
1 Introduction .................................................................................................................. 2
1.1 General Description ..................................................................................
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Introduction www.ti.com 1 Introduction 1.1 General Description The bq24351 evaluation module (EVM) is a complete charger module for evaluating a charger front-end protection and charger solution using the bq24351 and bq2057C devices. It is designed to deliver up to 560 mA of charge current to Li-ion or Li-polymer applications. The charger front-end protection current is designed to 1.2 A. The bq24351 protects the charging system against three types of failures: input overvoltage when the ac adap
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www.ti.com Test Summary 1.4 Controls and Key Parameters Setting (1) Jack Description Factory Setting JP1 If on, high-side sensing resistor is disabled Jumper on JP2 Reserved for other ICs Jumper (BATEN, GND) on JP3 bq24351 GATDRV pin Jumper off JP4 bq2057C BAT pin connection to bq24351 Jumper on JP5 bq2057C VCC pin connection to bq24351 Jumper on JP6 bq2057C CC pin connection to bq24351 Jumper on JP7 If on, low-side current-sensing resistor is disabled Jumper off (1) Short JP1, JP4, JP5, and JP6
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Test Summary www.ti.com 2.2.2 Load 1 A 10-V (or above), 2-A (or above) electronic load that can operate in constant-current mode. 2.2.3 Load 2 A 10-V (or above), 2-A (or above) electronic load that can operate in constant-voltage mode. 2.2.4 Meters Four Fluke 75 multimeters (equivalent or better) Or: Three equivalent voltage meters and one equivalent current meter The current meter must be capable of measuring 2-A+ current. 2.2.5 Wire Gauge All wires connected to the EVM input power supply and o
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www.ti.com PCB Layout Guideline 2.4 Procedure 2.4.1 Charger Current and Voltage Regulation 1. Ensure that steps in Section 2.3 are followed. 2. Enable output of PS 1. 3. Increase the output voltage of PS 1 to 5 V ±0.1 V. 4. Enable the output of load 2. Measure → V(J2(OUT)) = 3.6 V ±200 mV Measure → Ibat = 560 mA ±70 mA Observe → D2 on, D3 on, D6 off, D7 on. 2.4.2 CFET Input Overvoltage Protection 1. Increase the voltage of PS 1 to 11 V ±0.1 V. Observe → D2 on, D3 off, D6 off, D7 off. 2. Decrease
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Bill of Materials, Board Layout, and Schematic www.ti.com 4 Bill of Materials, Board Layout, and Schematic 4.1 Bill of Materials Table 1. Bill of Materials bq24351 RefDes Value Description Size Part Number MFR 1 C1 1 µF Capacitor, ceramic, 35-V, X5R, 10% 603 Std Std 3 C2, C3, C5 1 µF Capacitor, ceramic, 10-V, X7R, 10% 603 Std Std 1 C4 0.1 µF Capacitor, ceramic, 16-V, X7R, 10% 805 Std Std 1 C6 0.1 µF Capacitor, ceramic, 10-V, X7R, 10% 603 Std Std 1 C7 220 µF Capacitor, electrolytic, 25-V, 20% 0.3
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www.ti.com Bill of Materials, Board Layout, and Schematic 4.2 Board Layout C001 Figure 2. Top Layer 7 SLUU455–October 2010 bq24351EVM for Li-Ion Charger Front-End Protection IC Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated
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Bill of Materials, Board Layout, and Schematic www.ti.com C002 Figure 3. Bottom Layer 8 bq24351EVM for Li-Ion Charger Front-End Protection IC SLUU455–October 2010 Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated
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www.ti.com Bill of Materials, Board Layout, and Schematic C003 Figure 4. Top Silk Screen 9 SLUU455–October 2010 bq24351EVM for Li-Ion Charger Front-End Protection IC Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated
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Bill of Materials, Board Layout, and Schematic www.ti.com C004 Figure 5. Top Assembly 10 bq24351EVM for Li-Ion Charger Front-End Protection IC SLUU455–October 2010 Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated
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www.ti.com Bill of Materials, Board Layout, and Schematic 4.3 Schematic Figure 6. bq24351 Schematic 11 SLUU455–October 2010 bq24351EVM for Li-Ion Charger Front-End Protection IC Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated CAUTION: Device may have surface temperature in excess of 60°C when unit is operational.
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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. As such, the goods being provided are not intended to be
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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. All products are sold subject to TI’s terms and conditions of sale supplied at the t
