SLUUCY7A November   2023  – October 2024 BQ25750

 

  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 Texas Instruments High Voltage Evaluation 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 Communication Interface Setup
      1. 2.4.1 BQSTUDIO using EV2400
      2. 2.4.2 TI Charger GUI for USB2ANY
    5. 2.5 Equipment
      1. 2.5.1 Equipment Set Up
      2. 2.5.2 Equipment - Using a CV Load
      3. 2.5.3 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

2.5.3 Equipment Setup - Using a CV Load

BQ25750

Use the following guidelines to set up the equipment:

  1. Set power supply 1 for 40 VDC, 6 A 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 23.5 V at electronic load input.
  7. Install the jumpers as indicated in IO and Jumper Descriptions.
  8. Unplug Jumper 13.
  9. If using Battery Management Studio, use the following steps:
    1. Connect J5 to the EV2400. Connect J5 to the I2C PORT 2 on the EV2400
    2. Turn on the computer and load 2. Open the bqStudio software.
    3. Select Charger and click the Next button.
      BQ25750
    4. Select Charger_1_00_BQ25750.bqz on the Select a Target Page.
    5. Click Field View after selecting the target device and then click the Read Register button.
      BQ25750
    6. Set WATCHDOG and EN_CHG to disabled
    BQ25750
  10. If using TI Charger GUI, use the following steps:
    1. Connect J4 to the USB2ANY. Turn on the computer and load 2.
    2. Navigate to the TI Charger GUI website and select the charger you are using:
      BQ25750
    3. You should see at the top-left, Hardware Connected. After you see the hardware is connected, select the plug icon on the left panel.
      BQ25750
    4. This is the Charger Configuration window. Click the Read All Register button at the top, then set WATCHDOG and EN_CHG to disabled. Set ICHG_REG to 4000mA and IPRECHG to 1000mA
      BQ25750

    5. Here is a brief description of what the other icons on the left side panel mean. Select through these icons to configure other operations of the battery charger.

      BQ25750
  11. Set EN_CHG to enabled and plug in Jumper 13.
  12. Set power supply 1 to 40 V, measure:

    V(J1(VAC)) = 40 V ± 0.5 V

    I(J1(IAC)) = 1.2 A ± 0.5 A

    V(J3(VBAT)) = 23.5 V ± 0.5 V

    I(J3(IBAT)) = 2 A ± 0.5 A

  13. Set power supply 1 for 23 V, measure:

    V(J1(VAC)) = 23 V ± 0.5 V

    I(J1(IAC)) = 2.1 A ± 0.5 A

    V(J3(VBAT)) = 23.5 V ± 0.5 V

    I(J3(IBAT)) = 2 A ± 0.5 A

  14. Set power supply 1 for 10 V, measure:

    V(J1(VAC)) = 10 V ± 0.5 V

    I(J1(IAC)) = 5 A ± 0.5 A

    V(J3(VBAT)) = 23.5 V ± 0.5 V

    I(J3(IBAT)) = 2 A ± 0.5 A

Use the following guidelines to test the BQ25750 EVM power path:

  1. Disconnect the power supply from J1 (VIN and PGND) and disconnect Load 1 from J3 (VOUT and PGND).
  2. Connect the output of power supply 1 to J3 (VOUT and PGND).
  3. Set power supply 1 for 20 V DC, 8 A current limit and then turn off power supply.
  4. Connect a voltage meter across J2 (VSYS) and J2 (PGND).
  5. Turn on power supply 1, measure V(J2(VSYS)) = 20 V ± 0.5 V.