DATASHEET
ISL6255, ISL6255A
Highly Integrated Battery Charger with Automatic Power Source Selector for Notebook Compute...
DATASHEET
ISL6255, ISL6255A
Highly Integrated Battery Charger with Automatic Power Source Selector for Notebook Computers
FN9203 Rev 2.00 May 23, 2006
The ISL6255, ISL6255A is a highly integrated 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.
The constant output
voltage can be selected for 2, 3 and 4 series Li-Ion cells with 0.5% accuracy over temperature. It can also be programmed between 4.2V+5%/cell and 4.2V-5%/cell to optimize battery capacity. When supplying the load and battery charger simultaneously, the input current limit for the AC adapter is programmable to within 3% accuracy to avoid overloading the AC adapter, and to allow the system to make efficient use of available adapter power f...