SLUSFD7
April 2024
BQ25308
PRODUCTION DATA
1
1
Features
2
Applications
3
Description
4
Description (continued)
5
Device Comparison Table
6
Pin Configuration and Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Timing Requirements
7.7
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Device Power Up
8.3.1.1
Power-On-Reset (POR)
8.3.1.2
REGN Regulator Power Up
8.3.1.3
Charger Power Up
8.3.1.4
Charger Enable and Disable by EN Pin
8.3.1.5
Device Unplugged From Input Source
8.3.2
Battery Charging Management
8.3.2.1
Battery Charging Profile
8.3.2.2
Battery Charging Profile for LiFePO4
8.3.2.3
Precharge
8.3.2.4
Charging Termination
8.3.2.5
Battery Recharge
8.3.2.6
Charging Safety Timer
8.3.2.7
Thermistor Temperature Monitoring
8.3.3
Charging Status Indicator (STAT)
8.3.4
Protections
8.3.4.1
Voltage and Current Monitoring
8.3.4.1.1
Input Over-Voltage Protection
8.3.4.1.2
Input Voltage Dynamic Power Management (VINDPM)
8.3.4.1.3
Input Current Limit
8.3.4.1.4
Cycle-by-Cycle Current Limit
8.3.4.2
Thermal Regulation and Thermal Shutdown
8.3.4.3
Battery Protection
8.3.4.3.1
Battery Over-Voltage Protection (VBAT_OVP)
8.3.4.3.2
Dead Battery Charge Inhibit
8.3.4.4
ICHG Pin Open and Short Protection
8.4
Device Functional Modes
8.4.1
Disable Mode, HiZ Mode, Sleep Mode, Charge Mode, Termination Mode, and Fault Mode
9
Application and Implementation
9.1
Application Information
9.2
Typical Applications
9.2.1
Typical Application
9.2.1.1
Design Requirements
9.2.1.2
Detailed Design Procedure
9.2.1.2.1
Charge Voltage Settings
9.2.1.2.2
Charge Current Setting
9.2.1.2.3
Inductor Selection
9.2.1.2.4
Input Capacitor
9.2.1.2.5
Output Capacitor
9.2.1.3
Application Curves
9.2.2
Typical Application with External Power Path
9.2.2.1
Design Requirements
9.2.2.2
Detailed Design Procedure
9.2.2.3
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Device and Documentation Support
12.1
Device Support
12.1.1
Third-Party Products Disclaimer
12.2
Receiving Notification of Documentation Updates
12.3
Support Resources
12.4
Trademarks
12.5
Electrostatic Discharge Caution
12.6
Glossary
13
Revision History
14
Mechanical, Packaging, and Orderable Information
パッケージ・オプション
デバイスごとのパッケージ図は、PDF版データシートをご参照ください。
メカニカル・データ(パッケージ|ピン)
RTE|16
サーマルパッド・メカニカル・データ
RTE|16
QFND525B
発注情報
slusfd7_oa
slusfd7_pm
1
Features
Standalone charger and easy to configure
High-efficiency, 1.2MHz, synchronous switch-mode 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 adaptors
Supports
4.1V - 17V
input voltage range with 28V absolute maximum input voltage rating
Input Voltage Dynamic Power Management (VINDPM) tracking battery voltage
High integration
Integrated reverse blocking and synchronous switching MOSFET
Internal input and charge current sense
Internal loop compensation
Integrated bootstrap diode
3.6V / 4.05V / 4.15V / 4.2V charge voltage
3.0A maximum fast charge current
200nA low battery leakage current at 4.5V V
BAT
4.25µA VBUS supply current in IC disable mode
Charge current thermal regulation at 120°C
Precharge current: 10% of fast charge current
Termination current: 10% of fast charge current
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 Over-Voltage 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
Available in a WQFN 3x3-16 package