Intersil Presents New ISL9204 Li-Ion Battery Charger IC

Intersil Corp. (Milpitas, CA) presented its new 28 V input ISL9204 fully integrated, single-cell, lithium-ion (Li-Ion) battery chargers, which eliminate the over-voltage protection circuit normally required in low-input chargers, reducing component count and overall system cost. The ISL9204 charger accepts input voltages up to 28 V, but is disabled when the input voltage exceeds the over-voltage protection threshold minimum of 10 V, enhancing system protection. The device is optimized for smaller cell capacities by setting the trickle charge threshold at 2.7 V and offering charge current accuracy of 10 percent between 75 mA and 150 mA. Target applications include bluetooth headsets, MP3/multimedia players, stand-alone chargers, mobile phones, and other hand-held devices.

The ISL9204 performs the constant current/constant voltage charge function required by Li-Ion batteries. The charge current and end-of-charge current are programmable with external resistors. When the charge current reduces to the programmable end-of-charge current level during the constant voltage charge phase, an end-of-charge indication is provided by the charge pin, which is an open-drain output. Two indication pins, power present and charge pin, allow simple interface to a microprocessor or LEDs. The company has secured design wins and is shipping the ISL9204 in production volumes.

The ISL9204 is available now in an eight-lead DFN standard or lead-free package, and is priced at $1.15 in 1,000-unit quantities.