ACT412

ACT412 Rev 1, 30-Oct-13 ActivePSRTM Quasi-Resonant PWM Controller FEATURES Patented Primary Side Regulation Technology Quasi-Resonant Operation Adjustable up to 120kHz Switching Frequency +/-5% Output Voltage Regulation Constant Power Operation Mode for Fast Start-up and Motor Drive Applications Integrated Line and Primary Inductance Compensation Built-in Soft-Start Circuit Line Under-Voltage, Thermal, Output Over- voltage, Output Short Protections Current Sense Resistor Short Protection Transformer Short Winding Protection Less than 100mW Standby Power Complies with Global Energy Efficiency and CEC Average Efficiency Standards Tiny SOT23-6 Packages mode including cycle-by-cycle current limiting. ACT412 is to achieve no overshoot and very short rise time even with big capacitive load (10000µF) with the built-in fast and soft start process, . The Quasi-Resonant (QR) operation mode can effectively improve efficiency, reduce the EMI n...