ACT361 Rev 8, 14-Nov-12 TM High Performance ActivePSR Primary Switching Regulator The ACT361 ensures safe operation with complete FEATURES protection against all fault conditions. Built-in Patented Primary Side Regulation protection circuitry is provided for output short- Technology circuit, output over-voltage, line under-voltage, and over temperature conditions. No Opto-Coupler TM The ACT361 ActivePSR is optimized for high Best-in-Class Constant Voltage, Constant performance, cost-sensitive applications, and Current Accuracy utilizes Active-Semis proprietary primary-side Low EMI feedback architecture to provide accurate constant voltage, constant current (CV/CC) regulation Proprietary Fast Startup Circuit without the need of an opto-coupler or reference Built-in Soft-Start Circuit device. Integrated line and primary inductance compensation circuitry provides accurate constant Integrated Line and Primary Inductance current operation despite wide variations in line Compensation voltage and primary inductance. Integrated output Integrated Programmable Output Cord cord resistance compensation further enhances Resistance Compensation output accuracy. The ACT361 achieves excellent Line Under-Voltage, Output Over-Voltage, regulation and transient response, yet requires less Output Short-Circuit and Over-Temperature than 150mW of standby power. Protection The ACT361 is optimized for 2W to 7W Complies with all Global Energy Efficiency applications. It is available in space-saving 6 pin and CEC Average Efficiency Standards SOT23-6 package. Adjustable power from 2W to 7W Figure 1: Minimum External Components Simplified Application Circuit Tiny SOT23-6 Package APPLICATIONS INPUT OUTPUT Chargers for Cell Phones, PDAs, MP3, Portable Media Players, DSCs, and Other Portable Devices and Appliances RCC Adapter Replacements Linear Adapter Replacements Standby and Auxiliary Supplies VDD BD GENERAL DESCRIPTION ACT361 The ACT361 belongs to the high performance SW TM patented ActivePSR Family of Universal-input CS FB AC/DC off-line controllers for battery charger and G adapter applications. It is designed for flyback topology working in discontinuous conduction mode (DCM). The ACT361 meets all of the global energy efficiency regulations (CEC, European Blue Angel, and US Energy Star standards) while using very few external components. TM Innovative Power - 1 - www.active-semi.com Copyright 2012 Active-Semi, Inc. FSCR ACT361 Rev 8, 14-Nov-12 ORDERING INFORMATION PACKING PART NUMBER TEMPERATURE RANGE PACKAGE PINS TOP MARK METHOD ACT361US-T -40C to 85C SOT23-6 6 TAPE & REEL FSCR PIN CONFIGURATION 6 SW 1 CS 5 G 2 FB BD 3 4 VDD SOT23-6 ACT361US-T PIN DESCRIPTIONS PIN NAME DESCRIPTION Switch Drive. Switch node for the external NPN transistor. Connect this pin to the external power 1 SW NPNs emitter. This pin also supplies current to VDD during startup. 2 G Ground. 3 BD Base Drive. Base driver for the external NPN transistor. 4 VDD Power Supply. This pin provides bias power for the IC during startup and steady state operation. 5 FB Feedback Pin. Connect this pin to a resistor divider network from the auxiliary winding. Current Sense Pin. Connect an external resistor (R ) between this pin and ground to set peak CS 6 CS current limit for the primary switch. The peak current limit is set by (0.396V 0.9) / R . For more CS detailed information, see Application Information. TM Innovative Power - 2 - www.active-semi.com Copyright 2012 Active-Semi, Inc.