SC805

` 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 complete 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
` 0.1A battery drain current in shutdown and monitor modes
` Over current protection in all charging modes
` CHRGB output communicates charging and end of charge cycle

*Calculated from package in still air, mounted to 3" to 4.5", 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.

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 complete. 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 100mV from the CV voltage a new charge cycle will begin. The timer function also protects against charging faulty batteries by turning off if the pre-charge time exceeds 1/4 of the total programmed charge duration.

The SC805 also provides battery detection, and a battery NTC thermistor interface to disable charging when the battery temperature exceeds safe-to-charge limits.

The SC805 can also function as a general purpose current source or as a current source for charging nickelcadmium (NiCd) and nickel-metal-hydride (NiMH) batteries.