Battery Charging Chip - Shenzhen Battery Charging Chip Manufacturer - ASC2002 Synchronous Rectifier ASC2002 Synchronous Rectifier with Built-in MOS Boost Converter for 8.4V Battery Charging Chip Features: ASC2002 is a highly integrated synchronous boost charger designed for two series-connected lithium-ion batteries (QFN package up to 1.5A, ESSOP10 package up to 2A). For various portable applications, the charging current can be programmed by using an external resistor. ASC2002 includes four charging processes: Short Circuit Charging (SC) for 0V batteries; Trickle Charging (TC) for fully discharged batteries; Constant Current Charging (CC) for fast battery charging; and Constant Voltage Charging (CV) for safe battery charging. It supports wake-up from deep discharge. Features: - Adjustable charging current up to 2A (subject to actual heat dissipation and input power) - Supports charge voltages of 7.3V, 8.4V, 8.6V, 8.7V, 8.8V - Input overvoltage protection up to 28V - Battery overvoltage protection up to 28V - Wide input working voltage range: 3.0V~6.5V - Peak efficiency up to 96%, and heavy load efficiency up to 90% - External shutdown EN function (QFN version) - Supports thermal regulation of charging current at 110℃/130℃ (customizable) - Complete charging status indication, single/dual LED options - Ultra-low thermal resistance ESSOP10 package (θJC=3.9℃/W) - Programmable adaptive input current limiting, achieving high power tracking through input voltage limiting, suitable for various adapters - Indication and control for load shutdown when battery is low (QFN version) - Input protection functions: input undervoltage lockout, input overvoltage - Battery protection functions: charging timeout, short circuit, overvoltage - Overtemperature protection at 160℃ - Supports integrated NTC resistor for battery pack charging hot plug and unplug