Overview

FA5546/47 is a current mode type switching power supply control IC possible to drive a power MOSFET directly. Despite of a small package with 8 pins, it has a lot of functions and it is best suited for power saving at the light load and decreasing external parts. Moreover it enables to realize a reduced space and a high cost-performance power supply.

Features

▪ Excellent Power Saving by lowering the oscillation frequency depending on the load at light load.

▪ Low power consumption by a built-in 500V high voltage startup circuit.

▪ Current Minus detection. Power Saving of the revision of the input voltage of OLP.

▪ Overload protection function with a few number of external components. Auto Recovery type or Timer Latch type.

▪ Two-stages Over Load Protection suitable for Motor Driving.

▪ Brown-In/Out Function without additional external components.

▪ VCC Over Voltage Protection function(OVP) (Vcc=26V).

▪ VCC Under-Voltage Lock-Out function (UVLO). (Vcc=18V/9.8V)

▪ Minimum ON width is replaced and restrains transient leaping up of the drain voltage of the MOSFET.

▪ Latch pin for an external signal: Over Temperature Protection, Over Voltage Protection etc.

▪ External MOSFET driving suitable for Power Supply up to 200W: -1.0A(sink),/+0.5A(source)

▪ Soft Start function.