Highly Integrated Battery Charger Controller for Notebook Computers

The ISL6252, ISL6252A is a highly integrated battery charger controller for Li-Ion/Li-Ion polymer batteries. High Efficiency is achieved by a synchronous buck topology. 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

• Thermal Shutdown

• 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