Fujitsu MB39A134
The MB39A134 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 charge voltage and current independently. It suppor ts a wide input v oltage r ange, enables lo w current consumption in standby mode, and can control the charge voltage and charge current with high precision, which is perfect for the built-in Li-ion battery charger used in devices such as notebook PC. MB39A134 has a A C adapter detection compar ator i ndependent of the DC/DC con verter controller, and can control the source of po wer supply to a system.