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FUJITSU SEMICONDUCTOR DATA SHEET
DS04-27248-1E
ASSP for Power Supply Applications (Secondary battery)
DC/DC Converter IC for Charging Li-ion Battery
MB39A125/126
■ DESCRIPTION
MB39A125/126 is a DC/DC converter IC for charging Li-ion battery, which is suitable for down-conversion, and uses pulse width modulation (PWM) for controlling the output voltage and current independently. This IC integrates the build-in comparator for the voltage detection of the AC adapter, and selects the AC adapter or battery automatically for power supply to the system. Provides a wide range of power supply voltage, low standby current, and high efficiency, which makes them ideal as a built-in charging device in products such as notebook PC.