SLUUD47 October   2024 BQ21088

 

  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 EVM Setup
    2. 2.2 EVM Connectors and Test Points
    3. 2.3 Testing Procedures
      1. 2.3.1 Equipment
      2. 2.3.2 Charge Mode
      3. 2.3.3 Ship Mode
  9. 3Hardware Design Files
    1. 3.1 Schematic
    2. 3.2 PCB Layouts
    3. 3.3 Bill of Materials
  10. 4Additional Information
    1. 4.1 Trademarks

2.3.2 Charge Mode

Connect the equipment as the following:

  • Power Supply PS#1: VIN of the BQ21088 at 5V.
  • Power supply PS#2: VBAT of the BQ21088 at 3.7V.
  • Scope Channel SC#1: VIN
  • Scope Channel SC#2: VSYS.
  • Scope Channel SC#3: VBAT

Turn the supply PS#2 on, then turn the supply PS#1 on. The VSYS rises to 4.5V. The device begins to charge as long as the TS is left at default configuration and there are no other faults.

BQ21088EVM BQ21088 EVM Connections Figure 2-1 BQ21088 EVM Connections

To adjust the charge current or change other parameters, connect the USB2ANY to the EVM and then start up the TI Charger GUI.

Note: If the supplies (VIN and VBAT) are turned off, then users need to restart the TI Charger GUI for the correct I2C transactions to be reflected in the TI Charger GUI.
BQ21088EVM TI Charger GUI Device SelectionFigure 2-2 TI Charger GUI Device Selection

Select the BQ2518X from the charger selection. Click Quick Start or Register Map.

BQ21088EVM BQ21088EVM ConnectedFigure 2-3 BQ21088EVM Connected

The Quick Start is shown in Figure 2-4.

BQ21088EVM Quick StartFigure 2-4 Quick Start

The register map is shown in Figure 2-5.

BQ21088EVM Register MapFigure 2-5 Register Map