GENERAL DESCRIPTION

The ACT513 is a high performance peak current mode PWM controller. ACT513 applies ActiveQRTM and frequency foldback technique to reduce EMI and improve efficiency. ACT513’s maximum design switching frequency is set at 45kHz. Very low standby power, good dynamic response and accurate voltage regulation is achieved with an opto-coupler and the secondary side control circuit.

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FEATURES

? CCM and Quasi-Resonant Operation

? Adjustable up to 45kHz Switching Frequency

? OCP/OLP Protection

? Integrated Patented Frequency Foldback

??? Technique

? Integrated Patented Line Compensation

? Built-in Soft-Start Circuit

? Line Under-Voltage, Thermal, Output Overvoltage, Output Short Protections

? Current Sense Resistor Short Protection

? Transformer Short Winding Protection

? 100mW Standby Power

? Complies with Global Energy Efficiency and

??? CEC Average Efficiency Standards

? Tiny SOT23-6 Packages

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APPLICATIONS

? AC/DC Adaptors/Chargers for Cell Phones,

??? Cordless Phone, PDAs, E-books

? Adaptors for Portable Media Player, DSCs,

??? Set-top boxes, DVD players, records

? Linear Adapter Replacements

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