Highly Integrated Battery Charger with Automatic Power Source Selector for Notebook Computers
The ISL6256, ISL6256A 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
⢠Programmable Charge Current Limit, Adapter Current
Limit and Charge Voltage
⢠Fixed 300kHz PWM Synchronous Buck Controller with
Diode Emulation at Light Load
⢠Overvoltage Protection
⢠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
⢠Supports Pulse Charging
⢠Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
⢠Notebook, Desknote and Sub-notebook Computers
⢠Personal Digital Assistant
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