Texas Instruments bq24735 User Manual
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Texas Instruments bq24735 User Manual

Battery charger evaluation module
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bq24735/725A Battery Charger Evaluation Module
This user's guide describes the features and operation of the bq24725A/735EVM Evaluation Module.
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Intel is a trademark of Intel Corporation.
Windows is a trademark of Microsoft Corporation.
SLUU507A - June 2011 - Revised September 2011
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Copyright © 2011, Texas Instruments Incorporated
SLUU507A - June 2011 - Revised September 2011
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User's Guide
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Summary of Contents for Texas Instruments bq24735

  • Page 1: Table Of Contents

    User's Guide SLUU507A – June 2011 – Revised September 2011 bq24735/725A Battery Charger Evaluation Module This user's guide describes the features and operation of the bq24725A/735EVM Evaluation Module. Contents ........................Introduction ...................... EVM Features ....................General Description ..................Input/Output Jack Description ................

  • Page 2: Introduction

    The bq24725A/735 is a high-efficiency, synchronous battery charger, offering low component count for space-constraint, multichemistry battery charging applications. The bq24735 supports the Turbo Boost mode by allowing the battery to discharge energy to the system when system power demand is temporarily higher than adapter maximum power level so that the adapter does not crash.

  • Page 3: Control And Key Parameters Setting

    Power Supply #2 (PS#2): a power supply capable of supplying 5 V at 1 A is required. Power Supply #3 (PS#3): a power supply capable of supplying 20 V at 5 A is required. SLUU507A – June 2011 – Revised September 2011 bq24735/725A Battery Charger Evaluation Module Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated...

  • Page 4: Equipment Setup

    Connect the USB port of the EV2300 kit to the USB port of the computer. The connections are shown in Figure bq24735/725A Battery Charger Evaluation Module SLUU507A – June 2011 – Revised September 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated...

  • Page 5: Ev2300 Kit Connections

    11. Turn on the computer. Open the bq24725A/735 evaluation software. The main window of the software appears as is shown in Figure SLUU507A – June 2011 – Revised September 2011 bq24735/725A Battery Charger Evaluation Module Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated...

  • Page 6: Procedure

    Figure 3, and disconnect USB cable. b) Check 3.3-V power supply (PS#2) and power supply #1 (PS#1) voltage on the EVM board. bq24735/725A Battery Charger Evaluation Module SLUU507A – June 2011 – Revised September 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated...

  • Page 7: Test Setup For Hpa710

    4. Type in 7800 in the Charge Option, and click Write, this enable charging. Measure → Ibat = 500 mA ± 100 mA SLUU507A – June 2011 – Revised September 2011 bq24735/725A Battery Charger Evaluation Module Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated...

  • Page 8: Printed-Circuit-Board Layout Guideline

    (minimize loop area), and do not route the sense leads through a high-current path. Place decoupling capacitor on these traces next to the IC. 5. Place output capacitor next to the sensing resistor output and ground. bq24735/725A Battery Charger Evaluation Module SLUU507A – June 2011 – Revised September 2011 Submit Documentation Feedback...
  • Page 9 Ensure that sufficient thermal vias are located directly under the IC, connecting to the ground plane on the other layers. SLUU507A – June 2011 – Revised September 2011 bq24735/725A Battery Charger Evaluation Module Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated...

  • Page 10: Bill Of Materials, Board Layout, And Schematics

    Resistor, Chip, 1/16W, 1% 10.0 Resistor, Chip, 1/4W, 1% 1206 R17, R18, R19 10.0k Resistor, Chip, 1/16W, 1% bq24735/725A Battery Charger Evaluation Module SLUU507A – June 2011 – Revised September 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated...
  • Page 11 5. Install label after final wash. Text shall be 8 pt font. Text shall be per Table 1. Table 1. Assembly Number Text HPA710-001 bq24725AEVM-710 HPA710-002 bq24735EVM-710 SLUU507A – June 2011 – Revised September 2011 bq24735/725A Battery Charger Evaluation Module Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated...

  • Page 12: Board Layouts

    Bill of Materials, Board Layout, and Schematics www.ti.com Board Layouts EXAS NSTRUMENTS Figure 5. Top Assembly bq24735/725A Battery Charger Evaluation Module SLUU507A – June 2011 – Revised September 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated...

  • Page 13: Top Layer

    Bill of Materials, Board Layout, and Schematics www.ti.com Figure 6. Top Layer SLUU507A – June 2011 – Revised September 2011 bq24735/725A Battery Charger Evaluation Module Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated...

  • Page 14: Second Layer

    Bill of Materials, Board Layout, and Schematics www.ti.com Figure 7. Second Layer bq24735/725A Battery Charger Evaluation Module SLUU507A – June 2011 – Revised September 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated...

  • Page 15: Third Layer

    Bill of Materials, Board Layout, and Schematics www.ti.com Figure 8. Third Layer SLUU507A – June 2011 – Revised September 2011 bq24735/725A Battery Charger Evaluation Module Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated...

  • Page 16: Bottom Layer

    Bill of Materials, Board Layout, and Schematics www.ti.com Figure 9. Bottom Layer bq24735/725A Battery Charger Evaluation Module SLUU507A – June 2011 – Revised September 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated...

  • Page 17: Bottom Assembly

    Bill of Materials, Board Layout, and Schematics www.ti.com Figure 10. Bottom Assembly SLUU507A – June 2011 – Revised September 2011 bq24735/725A Battery Charger Evaluation Module Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated...

  • Page 18: Schematics

    Bill of Materials, Board Layout, and Schematics www.ti.com Schematics Figure 11. Schematic bq24735/725A Battery Charger Evaluation Module SLUU507A – June 2011 – Revised September 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated...
  • Page 19 Any exceptions to this are strictly prohibited and unauthorized by Texas Instruments unless user has obtained appropriate experimental/development licenses from local regulatory authorities, which is responsibility of user including its acceptable authorization.
  • Page 20 FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
  • Page 21 Also, please do not transfer this product, unless you give the same notice above to the transferee. Please note that if you could not follow the instructions above, you will be subject to penalties of Radio Law of Japan. Texas Instruments Japan Limited (address) 24-1, Nishi-Shinjuku 6 chome, Shinjuku-ku, Tokyo, Japan http://www.tij.co.jp...
  • Page 22 FDA Class III or similar classification, then you must specifically notify TI of such intent and enter into a separate Assurance and Indemnity Agreement. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2012, Texas Instruments Incorporated...
  • Page 23 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. TI objects to and rejects any additional or different terms you may have proposed. IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2021, Texas Instruments Incorporated...

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