Description
FA5500A/FA5501A are control ICs for a power factor correction converter using critical conduction mode of operation. This IC uses a CMOS device with high dielectric strength (30V) to implement low power consumption. These ICs contain compensated current sense comparator for light load and open/short protection at feedback (FB) pin. Compensated current sense comparator for light load keeps output voltage constant from no-load to full-load. Open/short protection at FB pin
stops output pulses when voltage divider to detect output voltage becomes fault. 

Features
•  Low current consumption by CMOS process Start-up : 20µA(max.), Operating : 1mA(typ.)
•  Drive circuit for connecting a power MOSFET directly
•  Output peak current,   source : 500mA, sink : 1000mA
•  Compensated current sense comparator for light load 
•  Open/short protection at feedback (FB) pin
•  Undervoltage Lockout
   FA5500A: 11.5V ON / 9V OFF   FA5501A:13V ON / 9V OFF
•  Overvoltage protection
•  Restart timer
•  Package: DIP-8 / SOP-8