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Intersil's ISL9222A battery charger IC detects auxiliary and external power connections in cell phones and Bluetooth devices. The eight-lead, TDFN-packaged, Li-Ion component incorporates a charger and digital logic (OR gate) into a single chip. The unit accepts an input voltage up to 28 V, but is disabled when the input voltage exceeds the overvoltage protection threshold (typically 7.2 V.) The ISL9222A offers a thermal foldback function that protects the charger from over-temperature conditions; voltage accuracy of 1% and an indication pin (PPR) for interface to a microprocessor or LED.

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Intersil
http://www.intersil.com