SLUUD99A February   2025  – April 2025 BQ25858-Q1 , BQ25858B-Q1

 

  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 Specifications
      1. 1.3.1 Recommended Operating Conditions
      2. 1.3.2 PCB and Mechanical Parameters
    4. 1.4 Device Information
    5. 1.5 General Texas Instruments High Voltage Evaluation (TI HV EMV) User Safety Guidelines
      1. 1.5.1 General Safety Information
  7. 2Hardware
    1. 2.1 Power Requirements
    2. 2.2 Equipment
    3. 2.3 Setup
    4. 2.4 Header Information
    5. 2.5 Jumper Information
  8. 3Software
    1. 3.1 Communication Interface Installation
      1. 3.1.1 BQSTUDIO using EV2400
      2. 3.1.2 TI Charger GUI for USB2ANY
  9. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  10. 5Additional Information
    1. 5.1 Trademarks
  11. 6Revision History

2.3 Setup

BQ25858-Q1EVM BQ25858B-Q1EVM

Use the following guidelines to set up the equipment:

  1. Set power supply #1 for 20 VDC, 8A 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 (VOUT and PGND).
  5. Connect a voltage meter across J3 (VOUT and PGND).
  6. Set electronic load to CC mode at 4A. Turn off load #1.
  7. Make sure the jumpers are installed as indicated in IO and Jumper Descriptions.
  8. If using Battery Management Studio, use the following steps:
    1. Connect J8 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.
      BQ25858-Q1EVM BQ25858B-Q1EVM
    4. Select Charger_2_00_BQ25758.bqz on the Select a Target Page.
    5. After selecting the target device, click Field View and then click the Read Register button.
    BQ25858-Q1EVM BQ25858B-Q1EVM
  9. Set WATCHDOG to disabled.
    BQ25858-Q1EVM BQ25858B-Q1EVM
  10. In 16 Bit Registers, VOUT_REG default is 5000mV
  11. If using TI Charger GUI, use the following steps:
    1. Connect J7 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. The BQ25758 GUI will work with the BQ25858EVM.
      BQ25858-Q1EVM BQ25858B-Q1EVM
    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.
      BQ25858-Q1EVM BQ25858B-Q1EVM
    4. This is the Charger Configuration window. Click the Read All Register button at the top, then set WATCHDOG to disabled and set the Output_Voltage_Limit to 5000mV
      BQ25858-Q1EVM BQ25858B-Q1EVM

    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.

      BQ25858-Q1EVM BQ25858B-Q1EVM
  12. Buck Test: Set VOUT_REG to 5V (5000mV) and then turn on load #1, measure

    V(J1(VAC)) = 20V ± 0.5V

    I(J1(IAC)) = 1A ± 0.5A

    V(J3(VOUT)) = 5V ± 0.5V

    I(J3(IOUT)) = 4A ± 0.5A

  13. Buck-Boost Test: Set VOUT_REG to 20V (20000mV), measure

    V(J1(VAC)) = 20V ± 0.5V

    I(J1(IAC)) = 4A ± 0.5A

    V(J3(VOUT)) = 20V ± 0.5V

    I(J3(IOUT)) = 4A ± 0.5A

  14. Boost Test: Set VOUT_REG to 36V (360000mV), measure

    V(J1(VAC)) = 20V ± 0.5V

    I(J1(IAC)) = 7.2A ± 0.5A

    V(J3(VOUT)) = 38V ± 0.5V

    I(J3(IOUT)) = 4A ± 0.5A