MERRIMACK, N.H.-- Unitrode Corp. here has introduced a series of of advanced linear lithium-ion (Li-Ion) charge management ICs for portable devices such as cell phones, digital cameras, and personal digital assistants (PDAs).
The Benchmarq bq2057 series integrates advanced charge-management features into a small ,8-pin package, significantly reducing the number of required external components. A typical application requires only an external transistor, a small-current sense resistor, two capacitors, and a couple of resistors, the company said.
The bq2057 features include battery conditioning, high-accuracy current and voltage regulation, battery temperature monitoring, and other features that allow designers to integrate the charger into the end product without sacrificing performance or accuracy and eliminates the need for bulky external chargers.
The chips also have a sleep mode for low power consumption of less than 10 microamps, typical.
Samples are available now, with production quantities scheduled for the first quarter of 2000. Pricing starts at $1.15 for the bq2057 8-pin narrow SOIC package or TSSOP and $1.10 for the 8-pin DIP in 25,000-piece quantities.