用户手册 — Texas Instruments Evaluation Module for BQ76925 Analog Front End for 3 to 6 Series Lithium-Ion Cells BQ76925EVM

目录

• bq76925EVM Evaluation Module

  1
  • 1 Overview

    4
    • 1.1 Features

      4
    • 1.2 Kit Contents

      4
    • 1.3 Equipment Requirements

      4
      • 1.3.1 bq76925 Evaluation Software

        4
      • 1.3.2 Microsoft Windows-Compatible Computer

        4
      • 1.3.3 USB-TO-GPIO Adapter

        5
      • 1.3.4 Power Supply for Onboard Cell Simulator

        5
      • 1.3.5 Power Supply for Simulation of Current

        5
      • 1.3.6 Battery

        5
      • 1.3.7 Power Supply to Charge Battery

        5
      • 1.3.8 Electronic Load

        6
      • 1.3.9 Digital Multimeter

        6
      • 1.3.10 Oscilloscope

        6
  • 2 Circuit Details and Configuration

    6
    • 2.1 Connections

      6
      • 2.1.1 BATT+, BATT– (CN1, CN2)

        6
      • 2.1.2 Cells (CN6)

        7
      • 2.1.3 PACK+, PACK– (CN3, CN4)

        7
      • 2.1.4 USB Interface (CN8)

        7
      • 2.1.5 JTAG Interface (CN7)

        7
      • 2.1.6 Pack Status (CN5)

        8
    • 2.2 Configuration Jumpers and Switches (J1 – J6, S2, S4)

      8
      • 2.2.1 Cell Simulator DIP Switch (S4)

        9
      • 2.2.2 Circuit Isolation DIP Switch (S2)

        10
    • 2.3 Pushbuttons (S1, S3)

      10
    • 2.4 Test Points

      10
    • 2.5 bq76925

      11
    • 2.6 MSP430F2122

      11
  • 3 Quick-Start Demonstration

    11
    • 3.1 Evaluation Software and USB-TO-GPIO Adapter

      11
    • 3.2 Configuration Switches and Jumpers

      12
    • 3.3 Power to the bq76925EVM

      12
    • 3.4 Connect USB-TO-GPIO Adapter

      12
    • 3.5 bq76925 Evaluation Software

      13
      • 3.5.1 Open the Application

        13
      • 3.5.2 Start Polling Data

        13
      • 3.5.3 Add Second Power Supply to Simulate Current

        14
  • 4 Control Register Demonstration

    16
    • 4.1 View Control Registers

      16
      • 4.1.1 Introduction

        16
      • 4.1.2 Factory-Programmed Register Values

        18
      • 4.1.3 Register Values When Polling

        18
    • 4.2 Control Registers Introduction

      18
      • 4.2.1 STATUS: 0x00

        19
      • 4.2.2 CELL_CTL: 0x01

        19
      • 4.2.3 BAL_CTL: 0x02

        19
      • 4.2.4 CONFIG_1: 0x03

        19
      • 4.2.5 CONFIG_2: 0x04

        19
      • 4.2.6 POWER_CTL: 0x05

        19
    • 4.3 Modifying Control Registers

      19
    • 4.4 Sleep Mode and Wake Up

      19
  • 5 Control Panel Demonstration

    21
    • 5.1 Access to the Control Panel

      21
    • 5.2 Measurement Tab

      22
    • 5.3 Analog Output Section

      22
    • 5.4 VCOUT Readings

      23
    • 5.5 VIOUT Readings

      23
    • 5.6 Auto Control

      23
    • 5.7 EEPROM Correction Registers

      24
    • 5.8 Startup Config Tab

      24
    • 5.9 Configuration Control

      24
      • 5.9.1 Configuration Control Example

        25
    • 5.10 Power Control

      25
    • 5.11 Logging Tab

      25
    • 5.12 Log File

      26
    • 5.13 Log File Options

      26
    • 5.14 Enable/Disable Logging

      26
    • 5.15 Log File Example

      26
    • 5.16 Communications Tab

      27
    • 5.17 Monitor Window

      27
    • 5.18 Transactions During a Connect to Device Command

      28
    • 5.19 I2C

      29
    • 5.20 I2C Register Read

      29
    • 5.21 I2C Register Write

      29
    • 5.22 I2C Communications With MSP430F2122

      29
    • 5.23 Example of I2C Communications from MSP430F2122

      30
  • 6 3-, 4-, and 5-Cell Operation

    31
    • 6.1 Introduction

      31
    • 6.2 Using Onboard Cell Simulator

      31
    • 6.3 Five-Cell Operation

      31
    • 6.4 Four-Cell Operation

      32
    • 6.5 Three-Cell Operation

      32
  • 7 Operation With Cells

    32
    • 7.1 Preparing Circuit for Operation

      32
    • 7.2 Battery Connection Sequence

      33
    • 7.3 Six-Cell Operation

      33
    • 7.4 Five-Cell Operation

      33
    • 7.5 Four-Cell Operation

      33
    • 7.6 Three-Cell Operation

      34
    • 7.7 Battery Removal Sequence

      34
  • 8 Schematic and Bill of Materials

    34
    • 8.1 Schematics

      35
    • 8.2 Bill of Materials

      37
  • 9 Printed-Circuit Board

    38
• Important Notices

  42