ISL6251 PDF Datasheet
Please enter the part number you wish to PDF download in the search bar.
Description
This is Low Cost Multi Chemistry Battery Charger Controller.
®
ISL6251, ISL6251A
Data Sheet April 22, 2005 FN9202.0
Low Cost Multi-Chemistry Battery Charger Controller
The ISL6251, ISL6251A is a highly integrated battery charger controller for Li-Ion, Li-Ion polymer batteries and NiMH 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 be also 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 for cha.