SLUUD24 May   2024 BQ25770G

 

  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 General Description
    2. 2.2 Definitions
    3. 2.3 Equipment
    4. 2.4 Equipment Setup
    5. 2.5 Procedure
      1. 2.5.1 Charge Function
      2. 2.5.2 OTG Function
  9. 3Hardware Design Files
    1. 3.1 Schematic
    2. 3.2 PCB Layout
    3. 3.3 Bill of Materials
  10. 4Additional Information
    1. 4.1 Trademarks

2.4 Equipment Setup

The test setup for BMS089 is shown in Figure 3-1. Please refer to the test setup and follow the guidelines below.

BQ25770GEVM, BQ25773GEVM Test Setup for BMS089 (BQ2577xGEVM)Figure 2-1 Test Setup for BMS089 (BQ2577xGEVM)

Use the following guidelines to set up the equipment:

  1. Set power supply #1 for 20V DC, 9A 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 J2 (VSYS and PGND).
    Connect a voltage meter across J2 (VSYS and PGND).
    Set 2A at the constant current mode. Turn off load #1.
  5. Connect Load #2 in series with a current meter to J3 (VBAT and PGND).
    Connect a voltage meter across J3 (VBAT and PGND).
    Set 15V at KEPCO load output. Turn off load #2.
Note: Add a 100µF capacitor on the BAT pin when testing without a real battery.

Connect J8 to the EV2400. Connect J8 to the SMBus PORT 1 (BQ25770G) or I2C PORT 2 (BQ25773G) on the EV2400. Figure 3-2 shows the connections.

BQ25770GEVM, BQ25773GEVM EV2400 Connections
The figure shows the SMBus version EVM connection. If the user is using the BQ25773GEVM, then move the connector to the I2C port.
Figure 2-2 EV2400 Connections
  1. Install jumpers as indicated in Table 3-2.
  2. Turn on the computer and power supply #1. Open the bqStudio software.
    1. Select Charger and click the Next button.
      BQ25770GEVM, BQ25773GEVM
    2. For SMBus BQ25770G, select Charger_1_00_BQ25770_770G.bqz on the Select a Target Page. For I2C BQ25773G, select Charger_1_00_BQ25773_773G.bqz on the Select a Target Page.
    3. After selecting the target device, click the Read Register button and the interface in Figure 3-3 is presented. Device ACK OK appears on the top right corner of window to indicate a successful communication.
BQ25770GEVM, BQ25773GEVM Main Window of the BQ2577xG Evaluation SoftwareFigure 2-3 Main Window of the BQ2577xG Evaluation Software