Camarillo, Calif.—Semtech's SC804 is a
1.5-amp, single-cell lithium-ion battery charger for cost-effective portable designs.
"The SC804 builds on the solid foundation of Semtech's charger technology with the addition of features like the CTO pin and the wide voltage input range that provide the flexibility needed for next-generation devices," said Larry King, vice president of Power Management for Handheld Products. "With the SC804, manufacturers can take an additional step toward offering product variations that meet customers' needs and maximize the profitability of their systems."
The SC804's cold temperature offset (CTO) pin allows designers to adjust the charging temperature range with a simple external resistor divider. With this capability, users can apply a single board design in multiple applications that require different temperature range limitations for charging.
The SC804, which integrates an FET pass transistor, reverse-blocking diode, sense resistor and thermal
protection, has an input voltage range of 3 to 14 volts. The high-voltage limit better protects portable systems from transients introduced from 12-volt adapter overshoots, or from the use of improper third-party
adapters. Under-voltage lock-out (UVLO) has been lowered to 3 volts in the SC804 so it will work well with current-limited adapters.
Other features include an integrated timer and programmable pre-charge, fast-charge and termination current settings. The chip can also be configured as a general-purpose current source for charging nickel-cadmium (NiCd) or nickel-metal-hydride (NiMH) batteries. The SC804 has a 4.2 volt output; the SC804A's output is 4.357 volts.
Click here for the datasheet. The SC804, packaged in a 4-by-4 mm, lead-free MLPQ package, is priced at $1.43 each in 1,000-piece lots. Evaluation boards for both versions are also available.
Semtech Corp., 1-805-498-2111, www.semtech.com