Highly Integrated Battery Charger
DATASHEET
ISL6253
Highly Integrated Battery Charger for Notebook Computers
FN9117 Rev.2.00 August 2004
The ISL6253 is...
Description
DATASHEET
ISL6253
Highly Integrated Battery Charger for Notebook Computers
FN9117 Rev.2.00 August 2004
The ISL6253 is a highly integrated battery charger controller for Li-Ion/Li-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 or 4 series Li-Ion cells with 0.5% accuracy over temperature. It can also be programmed between 4.2V +5% per cell and 4.2V -5% per 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 for charging. It also has programmable charging curren...
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