Texas Instruments bq24070/1 User Manual
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Texas Instruments bq24070/1 User Manual

1.5-a single-chip li-ion and li-pol charge management ic evm
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bq24070/1 1.5-A Single-Chip Li-Ion and Li-Pol Charge
This user's guide describes the bq24070/1 evaluation module (EVM). The EVM
provides a convenient method for evaluating the performance of a charge management
and system power solution for portable applications using the bq24070/1 product
family. A completly designed and tested module is presented. The charger is designed
to deliver up to 1.5 A of continuous current to the system or charger for one-cell Li-ion
or Li-polymer applications using a dc power supply. The charger is programmed from
the factory to deliver 1 A of charging current.
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Bill of Materials
SLUU248A - May 2006 - Revised August 2006
Submit Documentation Feedback
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bq24070/1 1.5-A Single-Chip Li-Ion and Li-Pol Charge Management IC EVM
User's Guide
SLUU248A - May 2006 - Revised August 2006
Management IC EVM
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Summary of Contents for Texas Instruments bq24070/1

  • Page 1: Table Of Contents

    1.5-A Single-Chip Li-Ion and Li-Pol Charge Management IC EVM This user’s guide describes the bq24070/1 evaluation module (EVM). The EVM provides a convenient method for evaluating the performance of a charge management and system power solution for portable applications using the bq24070/1 product family.

  • Page 2: Introduction

    – V Considerations When Testing and Using bq24070/1 ICs It is recommended to read the bq24070/1 data sheet prior to evaluating this EVM. Consider the following noteworthy items while testing and using the bq24070/1 IC. The two potential sources to power the system (V ) are: IN (adapter or USB source) and the battery.

  • Page 3: Performance Specification Summary

    5.25 VDC Li-Ion, Single-Cell, 1- to 2- A h Capacity × BAT+ (DC–) BAT– – B0136-01 Figure 1. Test Diagram SLUU248A – May 2006 – Revised August 2006 bq24070/1 1.5-A Single-Chip Li-Ion and Li-Pol Charge Management IC EVM Submit Documentation Feedback...
  • Page 4 If the battery voltage is higher, the battery supplements the current to keep the output from dropping too much (20 mV to 200 mV) below the bq24070/1 1.5-A Single-Chip Li-Ion and Li-Pol Charge Management IC EVM SLUU248A – May 2006 – Revised August 2006...
  • Page 5 28. If a load is applied across the battery such that the battery is discharged to ~4.1 V, the charger starts a new charging cycle. This concludes the evaluation of the bq24070/1 EVM. Several more features implemented in the IC are not demonstrated in this user's guide. See the data sheet to learn more about thermal regulation, thermal cutoff, USB boot up, and short-circuit protection.

  • Page 6: Schematic

    Schematic Schematic Figure 2. bq24070/1 EVM Schematic bq24070/1 1.5-A Single-Chip Li-Ion and Li-Pol Charge Management IC EVM SLUU248A – May 2006 – Revised August 2006 Submit Documentation Feedback...

  • Page 7: Physical Layouts

    EVM. Figure 8 shows the bottom etch layer of the EVM. 2.30 1.79 K001 Figure 3. Top Assembly View SLUU248A – May 2006 – Revised August 2006 bq24070/1 1.5-A Single-Chip Li-Ion and Li-Pol Charge Management IC EVM Submit Documentation Feedback...

  • Page 8: Top Silkscreen

    Physical Layouts 2.30 1.79 K002 Figure 4. Top Silkscreen 2.30 1.79 K003 Figure 5. Board Layout – Top Etch Layer bq24070/1 1.5-A Single-Chip Li-Ion and Li-Pol Charge Management IC EVM SLUU248A – May 2006 – Revised August 2006 Submit Documentation Feedback...

  • Page 9: Board Layout - Second Etch Layer

    Figure 6. Board Layout – Second Etch Layer 2.30 1.79 K005 Figure 7. Board Layout – Third Etch Layer SLUU248A – May 2006 – Revised August 2006 bq24070/1 1.5-A Single-Chip Li-Ion and Li-Pol Charge Management IC EVM Submit Documentation Feedback...

  • Page 10: Board Layout - Bottom Etch Layer

    Physical Layouts 2.30 1.79 K006 Figure 8. Board Layout – Bottom Etch Layer bq24070/1 1.5-A Single-Chip Li-Ion and Li-Pol Charge Management IC EVM SLUU248A – May 2006 – Revised August 2006 Submit Documentation Feedback...

  • Page 11: Bill Of Materials

    PCB, 2-inch × 1-inch × 0.031-inch — — HPA180_PCB Shunt, 100-mil, black 0.100-inch 929950-00 Add shunt to JMP1-0.5, JMP2-AC, JMP3-EN, JMP4-1/2, JMP5-1/2, JMP6-1/2. SLUU248A – May 2006 – Revised August 2006 bq24070/1 1.5-A Single-Chip Li-Ion and Li-Pol Charge Management IC EVM Submit Documentation Feedback...

  • Page 12: References

    1. bq24070 Single-Chip Charge and System Power-Path Management IC data sheet, SLUS694 2. bq24071 Single-Chip Charge and System Power-Path Management IC data sheet, SLUS713 bq24070/1 1.5-A Single-Chip Li-Ion and Li-Pol Charge Management IC EVM SLUU248A – May 2006 – Revised August 2006 Submit Documentation Feedback...
  • Page 13 February 2006 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.
  • Page 14 Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2006, Texas Instruments Incorporated EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 0 V to 6.5 V and the output...
  • Page 15 TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated products in automotive applications, TI will not be responsible for any failure to meet such requirements. Following are URLs where you can obtain information on other Texas Instruments products and application solutions: Products...
  • Page 16 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments BQ24071EVM BQ24070EVM...

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