ISL9221

ISL9221 NOT RECOMMENDED FOR NEW DESIGNS NO RECOMMENDED REPLACEMENT contact our Technical Support Center at 1-888-INTERSIL or www.intersil.com/tsc Dual Input Lithium Ion Battery Charger with OVP USB Bypass and 10mA LDO DATASHEET FN6541 Rev 1.00 April 3, 2008 The ISL9221 Lithium Ion charging IC is designed to meet the charging requirements of most of today’s handheld devices. The IC provides two inputs for either USB connection where the current is limited by the USB standard or for powering/charging from a power adapter. If the voltage at either VUSB or VDC pin is within the safe allowable range, the PPR pin is pulled low indicating to the system processor that external power is available. Charging can be enabled/disabled by controlling the state of the EN pin. While charging, the CHG pin is pulled low indicating the battery is being charged. The battery is charged to 4.2V with only a 1% error across the temperature range. USB charge current, Adapter charge current and charge te...