充电电路
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充电电路
JW3902
The JW3902 is a highly integrated synchronous switch-mode boost charger for 2- or 3-cell series Li-ion and Li-polymer battery. The JW3902 provides complete battery charging management includes pre-charge, constant-current fast charge, constant-voltage charge, charge termination and auto recharge. The device is able to charge the battery from a 5V adapter or USB input.
The JW3902 has I 2C compatible interface to configure the charge current up to 3.15A and battery full voltage up to 13.05V for different portable applications. The switching frequency, pre-charge current and termination current threshold can also be configured via I2C interface.
The JW3902 features input voltage based dynamic power management (VIN DPM) to limit the input power and avoid adapter or USB port being overloaded. An internal thermal feedback loop regulates the charge current to limit the die temperature during high power operation or high ambient temperature.
The JW3902 guarantees robustness with input under-voltage and over-voltage protection, battery over voltage protection, thermal shutdown, battery temperature monitoring, and a programmable timer to prevent prolonged charging of a dead battery.
The JW3902 is available in QFN4X4-24 package.
FEATURES
Fully Integration of Synchronous Boost Charger
All Power MOSFET
Current Sensing
Loop Compensation
3.6V to 5.5V Input Operation Voltage Range
Up to 20V Input Sustainable Voltage
Supports 2- or 3-Cell Battery Charging
Flexible Charging Parameter Configuration via I²C Interface
Pre-charge Current
Constant Current Charge Current
Charge Voltage
Termination Threshold
Input Voltage Based Dynamic Power Management
Input Over Voltage Protection (OVP)
Charge Status Indication
Comprehensive Safety Protection
Battery Over-Voltage Protection
Battery Temperature Monitoring
Configurable Charge Safety Timer
Watchdog Timer
Thermal Regulation and Thermal Shutdown
Ultra-Low Quiescent Current
QFN4x4-24 Package
APPLICATIONS
Blue Tooth Speaker
USB Powered Power Tools
POS Machine
需要样品测试或详细资料请联系：18126521362（点击复制微信号）
