SC803 Datasheet | SEMTECH

Description The SC803 is a fully integrated, single cell, constant-current constant-voltage Lithium-Ion battery charger management system. The SC803 has built in intelligence and extreme functionality. When the battery voltage is below 2.8V the charger operates in a pre-charge mode with a charging current of up to 125m A based on the ITERM pin resistor. This pre-charge mode is set to limit power dissipation due to an undercharged battery. When the battery voltage exceeds 2.8V, the charger enters a fast charge mode. In this mode, the SC803 delivers up to 1.5A to the battery based on the IPRGM pin resistor. Features ‹ Fully integrated charger with FET pass transistor, reverse-blocking diode, sense resistor and thermal protection ‹ plete voltage ranges of 4.1V, 4.2V & adjustable ‹ Programmable precharge, fastcharge & termination current ‹ Battery voltage controlled to 1% accuracy ‹ Soft-start for step load and adaptor plug-in ‹ Up to 1.5A continuous charge current ‹ Charge current monitor output from microcontroller or ADC Interface The part also Features current termination, ending the charge cycle when the battery is charged and the charge ‹ Input voltages range from 4.2V to 7V current drops below the current programmed by the ‹ 0.1µA Battery drain current in shutdown and monitor modes ITERM pin resistor. In addition, the charge current can ‹ Operates without a battery in regulated LDO mode be monitored by the voltage on the IPRGM pin allowing a microcontroller or ADC to access the current informa- ‹ Small 4mm x 4mm 16 lead MLP package °C/watt tion to determine when to externally terminate the charge ‹ Low thermal impedance of 50° cycle. Once the charge cycle is plete and terminates, ‹ Few external ponents Data Shee the device enters the charge monitor mode where the ‹ Over current protection in all charging modes output voltage of the battery is monitored. If this . voltage ‹ Over voltage protection with fault pin output drops below the recharge threshold...