SLUUC74 May   2021 BQ25720 , BQ25723

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 General Description
  3. 2Test Summary
    1. 2.1 Definitions
    2. 2.2 Equipment
    3. 2.3 Equipment Setup
    4. 2.4 Procedure
      1. 2.4.1 Charge Function
      2. 2.4.2 OTG Function
  4. 3Bill of Materials, Board Layout, and Schematics
    1. 3.1 Bill of Materials
    2. 3.2 Board Assembly Layout
    3. 3.3 Schematic

Equipment Setup

Use the following guidelines to set up the equipment:

  1. Set power supply #1 for 10-V DC, 5-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 J6 (VSYS and PGND).
    Connect a voltage meter across J6 (VSYS and PGND).
    Set 1 A at the constant current mode. Turn off load #1.
  5. Connect Load #2 in series with a current meter to J5 (VBAT and PGND).
    Connect a voltage meter across J5 (VBAT and PGND).
    Set 7 V at KEPCO load output. Turn off load #2.
    Note: Add a 47-µF capacitor on the BAT pin when testing without a real battery.
  6. Connect J3 to the EV2400. Connect J3 to the SMBus PORT 1 (BQ25720) or I2C PORT 2 (BQ25723) on the EV2400. Figure 2-1 shows the connections.
    GUID-C7576907-1A4A-4D0E-80B4-D493951BBD37-low.jpg
    The picture shows the SMBus version EVM connection. If using the BQ25723EVM, move the connector to the I2C port.
    Figure 2-1 EV2400 Connections
  7. Install jumpers as indicated in Table 1-2.

    After completing these steps, the test setup for BMS035 is as shown in Figure 2-2.

    GUID-20210112-CA0I-JDLF-D4GB-V6P1PQKFWMLQ-low.png Figure 2-2 Original Test Setup for BMS035 (BQ2572x EVM)
  8. Turn on the computer and power supply #1. Open the bqStudio software.
    1. Select Charger and click the Next button.
      GUID-BBABDD13-9908-4EF8-96CA-1BC9ED99FFAA-low.jpg
    2. For SMBus BQ25720, select “Charger_1_00_BQ25720.bqz” on the Select a Target Page. For I2C BQ25723, select “Charger_1_00_BQ25723.bqz” on the Select a Target Page.
    3. After selecting the target device, click the Read Register button and the interface in Figure 2-3 is presented.
GUID-20210510-CA0I-JRZV-NGS1-WPDFNDHS1HX1-low.png Figure 2-3 Main Window of the BQ2572x Evaluation Software