ACT511 - Active-Semi

ACT511 Quasi-Resonant PWM Controller

The ACT511 is a high performance peak current mode PWM controller. ACT511 applies ActiveQRTM and frequency foldback technique to reduce EMI and improve efficiency. ACT511’s maximum switching frequency is set at 90kHz. Very low standby power, good dynamic response and accurate voltage regulation is achieved with an opto-coupler and the secondary side control .

Features

• Quasi-Resonant Operation
• Adjustable up to 75kHz Switching Frequency
• Accurate OCP/OLP Protection
• Integrated Patented Frequency Foldback Technique
• Integrated Patented 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 Winding Short Protection
• 100mW Standby Power
• Complies with Global Energy Efficiency and CEC Average Efficiency Standards
• Tiny SOT23-6 Packages good margin. ACT511 integrates comprehensive protection. In case of ov.