SC802A

The SC802 is a fully integrated, single cell, constant-current/ constant-voltage Lithium-Ion\Lithium Polymer battery charger. With an integrated timer and complete charge control algorithm, the SC802 is well suited for stand-alone charger applications. The SC802 contains programmable pre-charge, fast-charge, and termination current settings. The SC802 can be programmed to terminate charge based on the output current or the timeout of the programmable timer. The fast charge current is typically set with an external resistor but can be modified with the analog fast charge input to allow a Power Management Controller to control the fastcharge current setting via DAC.

The 14V input voltage range of the SC802 eliminates additional protection circuitry required by other 5V chargers in the event of faulty adapters.

Reference ground and battery sense inputs are provided to allow Kelvin connections to eliminate IR voltage drops during charging.

The output voltage to the battery is controlled to within 1% of the programmed voltage for either 4.1V or 4.2V. The SC802 can also function as a general purpose current source or as a current source for charging nickelcadmium (NiCd) and nickel-metal-hydride (NiMH) batteries using NTC termination.

The SC802A version of the device is optimized for high termination current applications. All descriptions and text refering to the SC802 also apply to the SC802A unless otherwise noted.