JW3903 Datasheet | JoulWatt Technology

DESCRIPTION The JW®3903 is a highly integrated synchronous switch-mode boost charger for 2- or 3-cell series Li-ion and Li-polymer battery. The JW3903 provides plete 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 JW3903 supports up to 2.5A charge current, and the user can configure the current through external resistor for different applications. The charge voltage can also be configured to 8.4V, 8.7V, 12.6V or 13.05V via external resistor. The boost converter switching frequency is 1MHz and engages PFM in light load to maintain high efficiency. The JW3903 features input voltage based dynamic power management (VIN DPM) to limit the input power and avoid adapter or USB port overloading. An internal thermal feedback loop regulates the charge current to limit the die temperature during high power operation or high ambient temperature. The JW3903 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 JW3903 is available in QFN4X4-24 package. FEATURES - Fully Integration of Synchronous Boost Charger - All Power MOSFETs - Current Sensing - Loop pensation - 3.6V to 5.5V Input Operation Voltage Range - Up to 20V Input Sustainable Voltage - Supports 2- or 3-Cell Battery Charging - Input Voltage Based Dynamic Power Management - Input Over Voltage Protection - Flexible Parameter Setting via External Resistors - Charge Current - Charge Voltage - Charge Timer - VIN_DPM Threshold - Charge Status Indication - prehensive Safety Protection - Battery Over-Voltage Protection - Battery Temperature Monitoring - Charge Safety Timer - Thermal Regulation and Thermal Shutdown - Ultra-Low Quiescent Current: <1u A - Package: QFN4X4-24 APPLICATIO...