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ACT337 Datasheet(PDF) 1 Page - Active-Semi, Inc |
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ACT337 Datasheet(HTML) 1 Page - Active-Semi, Inc |
1 / 3 page Innovative Power TM - 1 - www.active-semi.com Copyright © 2011 Active-Semi, Inc. ActivePSR TM is a trademark of Active-Semi. High Performance ActivePSR TM Primary Switching Regulator FEATURES • Ultra Low Standby Power < 30mW • Patented Primary Side Regulation Technology • Suitable Operation Frequency up to 85kHZ • Proprietary Fast Startup Circuit • Integrated Line and Primary Inductance Compensation • Integrated Programmable Output Cord Resistance Compensation • Line Under-Voltage, Output Over-Voltage, Output Short-Circuit and Over-Temperature Protection • Complies with all Global Energy Efficiency and CEC Average Efficiency Standards • Adjustable Power from 7W to 12W • Minimum External Components • SOP-8 Package APPLICATIONS • RCC Adapter Replacements • Linear Adapter Replacements • Standby and Auxiliary Supplies GENERAL DESCRIPTION The ACT337 belongs to the high performance patented ActivePSRTM Family of Universal-input AC/DC off-line controllers for battery charger and adapter applications. It is designed for flyback topology working in discontinuous conduction mode (DCM). The ACT337 meets all of the global energy efficiency regulations (CEC, European Blue Angel, and US Energy Star standards) while using very few external components. The ACT337 ensures safe operation with complete protection against all fault conditions. Built-in protection circuitry is provided for output short- circuit, output over-voltage, line under-voltage, and over temperature conditions. The ACT337 ActivePSRTM is optimized for high performance, cost-sensitive applications, and utilizes Active-Semi’s proprietary primary-side feedback architecture to provide accurate constant voltage, constant current (CV/CC) regulation without the need of an opto-coupler or reference device. Integrated line and primary inductance compensation circuitry provides accurate constant current operation despite wide variations in line voltage and primary inductance. Integrated output cord resistance compensation further enhances output accuracy. The ACT337 achieves excellent regulation and transient response, yet requires less than 30mW of standby power. The ACT337 is optimized for compact size 7W to 12W charger applications. It is available in space- saving 8 pin SOP-8 package. Figure 1: Simplified Application Circuit ACT337 Product Brief, 15-Apr-11 ® |
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