ACT337 ® Product Brief, 15-Apr-11 High Performance ActivePSRTM Primary Switching Regulator 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. 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 The ACT337 is optimized for compact size 7W to 12W charger applications. It is available in spacesaving 8 pin SOP-8 package. • Line Under-Voltage, Output Over-Voltage, Output Short-Circuit and Over-Temperature Protection Figure 1: • Complies with all Global Energy Efficiency Simplified Application Circuit 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 shortcircuit, output over-voltage, line under-voltage, and over temperature conditions. The ACT337 ActivePSRTM is optimized for high performance, cost-sensitive applications, and Innovative PowerTM ActivePSRTM is a trademark of Active-Semi. -1- www.active-semi.com Copyright © 2011 Active-Semi, Inc. ACT337 ® Product Brief, 15-Apr-11 ORDERING INFORMATION PART NUMBER TEMPERATURE RANGE PACKAGE PINS PACKING METHOD TOP MARK ACT337SH-T -40°C to 85°C SOP-8 8 TAPE & REEL ACT337SH PIN CONFIGURATION ACT337SH SOP-8 ACT337SH PIN DESCRIPTIONS PIN NAME DESCRIPTION 1 SW Switch Drive. Switch node for the external NPN transistor. Connect this pin to the external power NPN’s emitter. This pin also supplies current to VDD during startup. 2,4,7 G Ground(2,4 and 7 pin must be connected together). 8 BD Base Drive. Base driver for the external NPN transistor. 6 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. 3 CS Current Sense Pin. Connect an external resistor (RCS) between this pin and ground to set peak current limit for the primary switch. The peak current limit is set by (0.396V × 0.9) / RCS. For more detailed information, see Application Information. SOP-8 Innovative PowerTM -2- www.active-semi.com Copyright © 2011 Active-Semi, Inc. ACT337 ® Product Brief, 15-Apr-11 Figure 6: Universal VAC Input, 5V/2.1A Output Charger Table 1:ACT337 Bill of Materials Item Reference 1 C1, C2 2 Description QTY Capacitor, Electrolytic, 10µF/400V, 10×16mm (Low leakage current) 2 C3 Capacitor, Ceramic,220pF/500V,1206,SMD 1 3 C4 Capacitor, Ceramic, 10µF/35V,1206,SMD 1 4 C5 Capacitor, Electrolytic, 1000µF/6.3V, 8 ×16mm 1 5 C6 Capacitor, Electrolytic, 820µF/6.3V, 6.3 × 16mm 1 6 C9 Capacitor, Ceramic,1000pF/50V,0805,SMD 1 7 CY1 Safety Y1,Capacitor,1000pF/400V,Dip 1 8 BD1 Bridge Rectifier,D1010S,1000V/1.0A,SDIP 1 9 D5 Fast Recovery Rectifier, RS1M,1000V/1.0A, RMA 1 10 D6 Fast Recovery Rectifier,RS1D,200V/1.0A,SMA 1 11 D8 Diode, Schottky, 45V/10A, S10U45S, SMD 1 12 L1 Choke Coil, 1.5mH, ¢6x8mm, DIP 1 13 Q1 Transistor, NPN, 700V,D13005,TO-126 1 14 F1 Fuse:1A 250V 3.6*10mm With Pigtail, ceramic tube 1 15 R1 Chip Resistor, 22Ω, 0805, 5% 1 16 R2 Chip Resistor, 1M,1206, 5% 1 17 R3 Chip Resistor, 390Ω,1206, 5% 1 18 R4 Chip Resistor, 15Ω, 0805, 5% 1 19 R5 Chip Resistor, 80.6k,0805, 1% 1 20 R6 Chip Resistor,18.2k,0805, 1% 1 21 R7 Chip Resistor, 30MΩ, 1206, 5% 1 22 R9 Chip Resistor, 0.62Ω,1206, 1% 1 23 R10 Chip Resistor, 162k,0805, 5% 1 24 R11 Chip Resistor, 3k, 0805, 5% 1 25 R13 Chip Resistor, 10Ω, 0805, 5% 1 26 T1 Transformer, LP = 1.25mH±7%, EPC17 1 27 U1 IC, ACT337SH-T,SOP-8 1 Innovative Power TM -3- www.active-semi.com Copyright © 2011 Active-Semi, Inc.