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EA411US 데이터시트(PDF) 1 Page - Active-Semi, Inc |
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EA411US 데이터시트(HTML) 1 Page - Active-Semi, Inc |
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1 / 15 page ![]() www.active-semi.com Copyright © 2014 Active-Semi, Inc. Innovative PowerTM - 1 - ActivePSR TM is a trademark of Active-Semi. ActivePSR TM Quasi-Resonant PWM Controller FEATURES • Patented Primary Side Regulation Technology • Quasi-Resonant Operation • Adjustable up to 120kHz Switching Frequency • +/-5% Output Voltage Regulation • Accurate OCP/OLP Protection • Integrated Output Cord Compensation • 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 APPLICATIONS • AC/DC Adaptors/Chargers for ADSL, PDAs, E-books • Adaptors for Portable Media Player, DSCs, and Other GENERAL DESCRIPTION The ACT411 is a high performance peak current mode PWM controller which applies ActivePSRTM and ActiveQRTM technology. ACT411 achieves accurate voltage regulation without the need of an opto-coupler or reference device. The ACT411 is designed to achieve less than 100mW Standby Power. By applying frequency fold back and ActiveQR TM technology, ACT411 exceeds the latest ES2.0 efficiency standard. ACT411 integrates comprehensive protection. In case of over temperature, over voltage, short winding, short current sense resistor, open loop and overload conditions, it would enter auto restart mode including cycle-by-cycle current limiting. ACT411 is to achieve no overshoot and very short rise time even with big capacitive load (4000µF) with the built-in fast and soft start process, . The Quasi-Resonant (QR) operation mode can effectively improve efficiency, reduce the EMI noise and further reduce the components in input filter. ACT411 is idea for application up to 36 Watt. Figure 1: Simplified Application Circuit ACT411 Rev 4, 27-Feb-14 |
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