SLUUCU7 November   2023 BQ25960H

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Equipment
    2. 2.2 Equipment Setup
    3. 2.3 I/O Descriptions
  9. 3Software
    1. 3.1 Software Setup
  10. 4Implementation Results
    1. 4.1 Test Procedure
      1. 4.1.1 Initial Settings
      2. 4.1.2 Communication Verification
      3. 4.1.3 Switched Cap Mode Charge Verification
      4. 4.1.4 Bypass Mode Charge Verification
      5. 4.1.5 Dual BQ25960H Operation
      6. 4.1.6 BQ25611D Charge Verification
  11. 5Hardware Design Files
    1. 5.1 Schematic
    2. 5.2 PCB Layout Guidelines
      1. 5.2.1 Board Layout
    3. 5.3 Bill of Materials
  12. 6Additional Information
    1.     Trademarks

4.1.6 BQ25611D Charge Verification

Out of the box, the BQ25960HEVM is configured to evaluate the performance of the BQ25960H only. If the BQ25611D must also be evaluated, then the user needs to populate R29 and R32, as shown in the schematic in Figure 6-3.

A typical use case is for the BQ25611D buck charger (U4) to perform low current pre-charge and charge termination, while one or both of the BQ25960H switched cap chargers (U1 and U2) perform high current fast charging to achieve the highest possible efficiency.

Use the following steps to charge with the BQ25611D. The I2C address for U4 is 0x6B.

  1. Turn PS1 and Load #1 off. Make any required hardware changes, such as populating R29 and R32 and configuring the jumpers.
  2. Decrease the output of Load #1 to 2.5 V. This voltage is low enough for the BQ25611D to pre-charge.
  3. Turn on PS1 and Load #1. The BQ25611D automatically begins to apply the default 0.18 A pre-charge current. The Charge Status register indicates this.
    GUID-20201218-CA0I-WZSM-X5RV-LR6MMPQPHGRC-low.png

  4. Increase the output of Load #1 above VBATLOWV (typical value of 3.12 V). The BQ25611D begins applying the default 1.02 A fast charge current. The Charge Status register indicates this.
    GUID-20201218-CA0I-P9RL-RPZ7-JWW0BSC9XQ7M-low.png