SLUUCV6 June   2024 BQ2969

 

  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
      1. 1.2.1 Required Equipment
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Setup
    2. 2.2 BQ2969 Circuit Module Use
      1. 2.2.1 Cell Simulator
      2. 2.2.2 Reducing the Cell Count
      3. 2.2.3 Connecting Cells
    3. 2.3 Best Practices
  9. 3Hardware Design Files
    1. 3.1 BQ2969EVM Circuit Module Physical Construction
      1. 3.1.1 Schematics
      2. 3.1.2 Board Layout
      3. 3.1.3 Bill of Materials
  10. 4Additional Information
    1. 4.1 Trademarks
  11. 5Related Documents from Texas Instruments

2.1 Setup

The BQ2969 installed on the board outputs OUT high during overvoltage faults as described in the BQ2969 data sheet.

The BQ2969 is configured for cell count by the connections on the board. By default the board is set up for four cells and this quick start is for all four cells. When fewer cells are used, refer to Section 2.2 and adjust the supply voltage appropriately.

These steps describe quick connection of the BQ2969EVM to demonstrate operation of the protector function of the EVM. For more detailed descriptions, refer to other sections of the user guide.

Refer to Figure 3-1 for the following steps:

  1. Install the cell simulator shunts on J6 and the power supply shunt on J2.
  2. Connect a 0V DC power supply capable of approximately 250mA between the BAT- and BAT+ terminals and adjust to approximately 14V.
  3. Connect a voltage meter to a VSS test point and monitor the TP2-OUT test point. Note that J4 (pin 3 - OUT) is not electrically connected by default.
  4. Connect a voltage meter to a VSS test point and monitor the TP3-REG test point.
  5. With nominal conditions observe that OUT (TP2) is low, approximately 0V, and REG (TP3) is high, approximately 3.3V.
  6. Demonstrate an overvoltage condition:
    1. Adjust the supply voltage to approximately 20V.
    2. Observe that OUT transitions to approximately 7V and the on-board LED turns on after 6.5 seconds.
    3. Adjust the supply voltage to approximately 14V.
  7. Demonstrate an undervoltage condition:
    1. Adjust the supply voltage to approximately 8V.
    2. Observe that REG transitions to approximately 0V after 6.5 seconds.
    3. Adjust the supply voltage to approximately 14V.
  8. Make other adjustments as desired for evaluation. See other sections of this user guide for details of operation.
  9. When complete with this quick start demonstration, turn off the power supply.

Refer to other sections of this user's guide for additional details.

BQ2969EVM EVM Connection for Basic Operation Figure 2-1 EVM Connection for Basic Operation