Switching Charger for 1-Cell Li-ion Batteries ISL9220B The ISL9220B is a cost-effective and versatile battery charger for 1-cell Li-Polymer based portable applications.
The device features synchronous PWM technology, maximizing power efficiency, thus minimizing charge time and heat.
The 1.
2MHz switching frequency allows use of small external inductors and capacitors.
A simple charge current programming method is provided.
External resistors program the fast charge and end-of-charge currents.
The two status outputs can be used to drive LEDs, or can be connected to the host processor.
A programmable charge timer provides the ability to detect defective batteries, and provides a secondary metho...

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