Highly Integrated Battery Charger with Automatic Power Source Selector for Notebook Computers

The ISL6255, ISL6255A is a highlyintegrated battery charger controller for Li-Ion/Li-Ion polymer batteries. High Efficiency is achieved by a synchronous buck topology and the use of a MOSFET, instead of a diode, for selecting power from the adapter or battery. The low side MOSFET emulates a diode at light loads to improve the light load efficiency and prevent system bus boosting.

Features

? ±0.5 Charge Voltage Accuracy (-10°C to 100°C)

? ±3 Accurate Input Current Limit

? ±3 Accurate Battery Charge Current Limit

? ±25 Accurate Battery Trickle Charge Current Limit (ISL6255A)

? Programmable Charge Current Limit, Adapter Current Limit and Charge Voltage

? Fixed 300kHz PWM Synchronous Buck Controller with Diode Emulation at Light Load

? Output for Current Drawn from AC Adapter

? AC Adapter Present Indicator

? Fast Input Current Limit Response

? Input Voltage Range 7V to 25V

? Support 2, 3 and 4 Cells Battery Pack

? Up to 17.64V Battery-Voltage Set Point

? Control Adapter Power Source Select MOSFET

? Thermal Shutdown

? Aircraft Power Capable

? DC Adapter Present Indicator

? Battery Discharge MOSFET Control

? Less than 10μA Battery Leakage Current

? Support Pulse Charging

? Charge Any Battery Chemistry: Li-Ion, NiCd, NiMH, etc.

? Pb-Free Plus Anneal Available (RoHS Compliant)