1.5A Battery Charger Device Lowers Portable Product Design Costs

The SC804 is the newest member of Semtech’s complete line of portable device battery chargers. The SC804 integrates a cold temperature offset (CTO) pin that allows designers to adjust the charging temperature range with a simple external resistor divider. With this capability, a single board design can be used in multiple applications that require different temperature range limitations for charging.
The SC804 has an input voltage range of 3-14V. The maximum voltage level better protects portable systems from transients introduced from 12V adapter overshoots, or from the use of improper third-party adapters. Under-voltage lock-out (UVLO) has been lowered to 3V in the SC804 so it will work well with current-limited adapters.
As a fully integrated device, the SC804 features a FET pass transistor, reverse-blocking diode, sense resistor and thermal protection. Other features of the device include an integrated timer and programmable pre-charge, fast-charge and termination current settings. It can also be configured as general-purpose current source for charging nickel-cadmium (niCd) or nickel-metal-hydride (NiMH) batteries.
Two variants of the device are available supporting different output voltages. The SC804 base device features a 4.2V output and the SC804A features a 4.357V output.
The SC804 is packaged in a 4 x 4 mm MLPQ package that is lead-free and complies with the European Union’s Restriction on Hazardous Substances in Electrical and Electronic Equipment (RoHS) directive to meet worldwide environmental and regulatory requirements.