SLUUD09 April   2024 BQ25308

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 I/O Descriptions
    2. 2.2 Equipment
    3. 2.3 Equipment Setup
  8. 3Implementation Results
    1. 3.1 Test Setup and Results
      1. 3.1.1 Test Procedure
        1. 3.1.1.1 Initial Settings
        2. 3.1.1.2 Precharge Mode Verification
        3. 3.1.1.3 Fast Charge Mode Verification
        4. 3.1.1.4 Battery Temperature Monitoring Verification
        5. 3.1.1.5 Helpful Tips
  9. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
      1. 4.2.1 Board Layout
    3. 4.3 Bill of Materials
  10. 5Additional Information
    1. 5.1 Trademarks

Features

  • Standalone charger and easy to configure
  • High-efficiency, 1.2MHz, synchronous switchmode buck charger
    • 92.5% charge efficiency at 2A from 5V input for 1-cell battery
    • 91.8% charge efficiency at 2A from 9V input for 1-cell battery
  • Single input to support USB input and high voltage adapters
    • Support 4.1V - 17V input voltage range with 28V absolute maximum input voltage rating
    • Input Voltage Dynamic Power Management (VINDPM) tracking battery voltage
  • 3.6V / 4.05V / 4.15V / 4.2V charge voltage
  • 3.0A maximum fast charge current
  • 200nA low battery leakage current at 4.5V VBAT
  • 4.25µA VBUS supply current in IC disable mode
  • Charge accuracy
    • ±0.5% charge voltage regulation
    • ±10% charge current regulation
  • Safety
    • Disable charge for dead battery condition
    • Thermal regulation and thermal shutdown
    • Input Under-Voltage Lockout (UVLO) and OverVoltage Protection (OVP)
    • Battery overcharge protection
    • Safety timer for precharge and fast charge
    • Charge disabled if current setting pin ICHG is open or short
    • Cold/hot battery temperature protection
    • Fault report on STAT pin