SLUUCT7C May   2023  – June 2024 BQ25756

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Device Information
    4. 1.4 General Texas Instruments High Voltage Evaluation (TI HV EMV) User Safety Guidelines
      1. 1.4.1 General Safety Information
  7. 2Hardware
    1. 2.1 Board Parameters
    2. 2.2 IO and Jumper Descriptions
    3. 2.3 Recommended Operating Conditions
    4. 2.4 Equipment
      1. 2.4.1 Equipment Set Up
      2. 2.4.2 Equipment - Using a CV Load
      3. 2.4.3 Equipment Setup - Using a CV Load
  8. 3Hardware Design Files
    1. 3.1 Schematic
    2. 3.2 PCB Layout
    3. 3.3 Bill of Materials
  9. 4Additional Information
    1. 4.1 Trademarks
  10. 5Revision History

2.4.3 Equipment Setup - Using a CV Load

BQ25756EVM

Use the following guidelines to set up and test the equipment:

  1. Set power supply #1 for 40VDC, 6A current limit and then turn off the supply.
  2. Connect the output of power supply #1 in series with a current meter to J1 (VIN and PGND).
  3. Connect a voltage meter across J1 (VIN) and J1 (PGND).
  4. Connect load #1 in series with a current meter to J3 (VBAT and PGND).
  5. Connect a voltage meter across J5 (VBAT and PGND).
  6. Set 23.5V at electronic load input.
  7. Connect J5 to the EV2400. Connect J5 to the I2C PORT 2 on the EV2400.
  8. Make sure the jumpers are installed as indicated in IO and Jumper Descriptions.
  9. Unplug Jumper 13.
  10. Turn on the computer and power supply #1. Open the bqStudio software.
    1. Select Charger and click the Next button.
      BQ25756EVM
    2. Select Charger_1_00_BQ25756.bqz on the Select a Target Page.
    3. After selecting the target device, click Field View and then click the Read Register button.
    BQ25756EVM
  11. Set WATCHDOG and EN_CHG to disabled.
    BQ25756EVM
  12. In 16 Bit Registers, set ICHG_REG to 4000mA and IPRECHG to 1000mA.
  13. Set EN_CHG to enabled. Plug in Jumper 13.
  14. Set power supply #1 to 40V, measure

    V(J1(VAC)) = 40V ± 0.5V

    I(J1(IAC)) = 2.4A ± 0.5A

    V(J3(VBAT)) = 23.5V ± 0.5V

    I(J3(IBAT)) = 3.9A ± 0.5A

  15. Set power supply #1 for 23V, measure

    V(J1(VAC)) = 23V ± 0.5V

    I(J1(IAC)) = 4.1A ± 0.5A

    V(J3(VBAT)) = 23.5V ± 0.5V

    I(J3(IBAT)) = 3.9A ± 0.5A

  16. Set power supply #1 for 19V, measure

    V(J1(VAC)) = 19V ± 0.5V

    I(J1(IAC)) = 5A ± 0.5A

    V(J3(VBAT)) = 23.5V ± 0.5V

    I(J3(IBAT)) = 3.9A ± 0.5A