ISL9228

DATASHEET ISL9228 Dual Input Li-ion/Li-Polymer Battery Charger With Battery Removal Detection FN6687 Rev 0.00 February 13, 2009 The ISL9228 is a fully integrated low-cost single-cell Li-ion or Li-polymer battery charger. The charger accepts two power inputs, normally one from a USB (Universal Serial Bus) port and the other from a desktop cradle. The ISL9228 is an ideal charger for smart handheld devices that need to communicate with a personal computer via USB. The ISL9228 features 28V maximum voltages for both the cradle and the USB inputs. Due to the 28V rated inputs, lowcost, large output tolerance adapters can be used safely. The 28V rating eliminates the over voltage protection circuit required in a low input voltage charger. When both inputs are powered, the cradle input is used to charge the battery. The charge current is programmable for the cradle input with a small resistor. The end-of-charge current is also programmable by another external resistor. The charger incorporat...