OB2203 is a highly integrated Quasi-Resonant controller optimized for high performance offline flyback converter applications. Reduced switching loss and improved EMI performance is achieved through Quasi Resonance control. A built-in P-channel MOSFET and its control are integrated to automatically turn on/off PFC stage according to the load conditions.


Features:

◆ PFC power supply control function integrated for PFC shutdown at no load and light load condition
◆ Programmable soft start
◆ Programmable load OVP
◆ Multi-Mode quasi resonance control for efficiency improvement and EMI optimize
◆ 1A gate drive capability
◆ Built-in slope compensation for better stability at low/high power design
◆ Upper frequency clamp at 130Khz for better EMI
◆ Selectable built-in latch shutdown for strong system reliability
◆ Available in DIP8 and SOP8 packages,RoHS compliant



Applications:

◆ Notebook Adapter
◆ CRT/LCD/PDP TV Power
◆ DLP Projector/RPD Power
◆ Home Appliance Power

Typical Application: