SLUUD09
April 2024
BQ25308
1
Description
Features
Applications
5
1
Evaluation Module Overview
1.1
Introduction
1.2
Kit Contents
1.3
Specification
1.4
Device Information
2
Hardware
2.1
I/O Descriptions
2.2
Equipment
2.3
Equipment Setup
3
Implementation Results
3.1
Test Setup and Results
3.1.1
Test Procedure
3.1.1.1
Initial Settings
3.1.1.2
Precharge Mode Verification
3.1.1.3
Fast Charge Mode Verification
3.1.1.4
Battery Temperature Monitoring Verification
3.1.1.5
Helpful Tips
4
Hardware Design Files
4.1
Schematic
4.2
PCB Layout
4.2.1
Board Layout
4.3
Bill of Materials
5
Additional Information
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