Semtech Charger Supports Battery Pack and Adapter Flexibility
Semtech Corp. has added the SC804, a linear, single-cell Lithium-Ion battery charger with battery pack and adapter flexibility features to support lower design costs for portable devices. 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.
"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, Semtech 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."
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 or nickel-metal-hydride 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. It is available immediately in production quantities and is priced at $1.43 each in 1,000-piece lots. Ordering code is SC804IMLTRT or SC804AMLTRT for the 4.357V output option.
