SC805 Datasheet | SEMTECH

Features ‹ Fully integrated charger with FET pass transistor, ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ reverse-blocking diode, sense resistor and thermal protection High Accuracy Charge Current- Tiny 3mm x 3mm 10 lead MLP package Programmable precharge, fastcharge & termination current Battery voltage controlled to 1% accuracy Built in timer for protection and plete charging NTC interface with battery detection Soft-start for step load and adaptor plug-in Up to 1A continuous charge current Input voltage range from 3V to 6V allows seamless charging from current limited adapter Provides adapter voltage VCCIL to power external accessories Battery Present detection and output indicator Operates in charger or LDO-mode without battery 0.1µA battery drain current in shutdown and monitor modes Over current protection in all charging modes CHRGB output municates charging and end of charge cycle POWER MANAGEMENT Description The SC805 is a fully integrated, single cell, constant-current (CC)/constant-voltage (CV) Lithium-Ion battery charger in a tiny 3x3 mm thermally enhanced lead free MLP package. The SC805 can operate as a stand-alone charger or in conjunction with a Power Management Controller (PMIC). The SC805 has a pre-charge function for trickle charging deeply discharged batteries. The fast charge current is enabled automatically when the battery voltage reaches the required threshold. When the battery reaches the constant voltage or CV portion of the charge curve the SC805 switches to CV regulation mode. In this mode the output current decays as the battery charges until the termination current is reached and the SC805 signals the charge cycle is plete. The SC805 can be configured to continue charging for a predetermined time before turning off, or to turn off immediately upon termination. After turning off its output, The SC805 enters monitor mode. If the battery voltage drops by 100m V from the CV voltage a new charge cycle will begin. The timer function also protects...