ACT412 Product Brief, 10-Mar-14 ActivePSRTM Quasi-Resonant PWM Controller FEATURES mode including cycle-by-cycle current limiting. • Patented Primary Side Regulation ACT412 is to achieve no overshoot and very short rise time even with big capacitive load (10000µF) with the built-in fast and soft start process, . Technology • Quasi-Resonant Operation The Quasi-Resonant (QR) operation mode can effectively improve efficiency, reduce the EMI noise and further reduce the components in input filter. • Adjustable up to 120kHz Switching Frequency • +/-5% Output Voltage Regulation • Constant Power Operation Mode for Fast ACT412 is idea for application up to 36 Watt. Figure 1: Start-up and Motor Drive Applications Simplified Application Circuit • Integrated Line and Primary Inductance Compensation • Built-in Soft-Start Circuit • Line Under-Voltage, Thermal, Output Overvoltage, 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 E-Shaver, Motor Driver, ADSL, Network Power, Cell Phone • Big Capacitive Load Application GENERAL DESCRIPTION The ACT412 is a high performance peak current mode PWM controller which applies ActivePSRTM and ActiveQRTM technology. ACT412 achieves accurate voltage regulation without the need of an opto-coupler or reference device. The ACT412 is designed to achieve less than 100mW Standby Power. By applying frequency fold back and ActiveQRTM technology, ACT412 exceeds the latest ES2.0 efficiency standard. ACT412 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 Innovative PowerTM ActivePSRTM is a trademark of Active-Semi. -1- www.active-semi.com Copyright © 2014 Active-Semi, Inc. ACT412 Product Brief, 10-Mar-14 ORDERING INFORMATION PART NUMBER TEMPERATURE RANGE PACKAGE PINS PACKING METHOD ACT412US-T -40°C to 85°C SOT23-6 6 TUBE & REEL TOP MARK FRYS PIN CONFIGURATION SOT23-6 ACT412US PIN DESCRIPTIONS PIN NAME DESCRIPTION 1 CS 2 GND Ground. 3 GATE Gate Drive. Gate driver for the external MOSFET transistor. 4 VDD 5 FB 6 COMP Current Sense Pin. Connect an external resistor (RCS) between this pin and ground to set peak current limit for the primary switch. Power Supply. This pin provides bias power for the IC during startup and steady state operation. Feedback Pin. Connect this pin to a resistor divider network from the auxiliary winding. Compensation Pin. Innovative PowerTM ActivePSRTM is a trademark of Active-Semi. -2- www.active-semi.com Copyright © 2014 Active-Semi, Inc. ACT412 Product Brief, 10-Mar-14 Figure 2: ACT412, Universal VAC Input, 12V/400mA Output Charger V-I Characteristic vs. VIN (25˚C) 16 High Limit 115V 12 Low Limit 10 V 90 Output Voltage (V) 14 230V 8 264V 6 4 2 0 0 300 600 900 1200 1400 Output Current (mA) Innovative PowerTM ActivePSRTM is a trademark of Active-Semi. -3- www.active-semi.com Copyright © 2014 Active-Semi, Inc. ACT412 Product Brief, 10-Mar-14 Table 2: ACT412 Bill of Materials ITEM REFERENCE 1 U1 QTY MANUFACTURER IC, ACT412,SOT23-6 2 DESCRIPTION 1 Active-Semi. C1,C2 Capacitor, Electrolytic, 6.8µF/400V, 10x12mm 2 KSC 3 C3 Capacitor, Ceramic, 1000pF/500V, 0805,SMD 1 POE 4 C4 Capacitor, Electrolytic,4.7µF/35V,5x11mm 1 KSC 5 C5,C6 Capacitor, Electrolytic, 330µF/16V, 8x11.5mm 2 KSC 6 C8 Capacitor, Ceramic, 0.1µF/25V, 0805,SMD 1 POE 7 C9 Capacitor, Ceramic, 1000pF/100V, 0805,SMD 1 POE 8 C10 Capacitor, Ceramic, 200pF/50V, 0805,SMD 1 POE 9 CY1 Safety Y1,Capacitor,1000pF/400V,Dip 1 UXT 10 D1-D4 Diode,Rectifier,1000V/1A,1N4007, DO-41 4 Good-Ark 11 D5 Fast Recovery Rectifier, RS1M,1000V/1.0A, RMA 1 PANJIT 12 D6 Fast Recovery Rectifier,RS1D,200V/1.0A,SMA 1 PANJIT 13 D7 NC 14 D8 Diode, schottky, 100V/3A, SB3100, DO-47 1 Good-Ark 15 L1 Axial Inductor, 1.5mH, 5*7,Dip 1 SoKa 16 L2 Axial Inductor, 0.55*5T, 5*7,Dip 1 SoKa 17 Q1 Mosfet Transistor, 4N60,TO-220 1 Infineon 18 PCB1 PCB, L*W*T=52.2x30x1.6mm,Cem-1,Rev:A 1 Jintong 19 FR1 Fuse,1A/250V 1 TY-OHM 20 R1 Chip Resistor, 51Ω, 0805, 5% 1 TY-OHM TY-OHM 21 R2 Chip Resistor, 510KΩ, 1206, 5% 1 22 R3 Chip Resistor, 100Ω, 0805, 5% 1 TY-OHM 23 R4,R13 Chip Resistor, 22Ω, 0805, 5% 2 TY-OHM 24 R5 Chip Resistor, 45.3KΩ, 0805,1% 1 TY-OHM 25 R6 Chip Resistor, 6.9KΩ, 0805, 1% 1 TY-OHM 26 R7,R8 Chip Resistor, 1.5MΩ, 0805 , 5% 2 TY-OHM 27 R9 Chip Resistor, 0.75Ω, 1206,1% 1 TY-OHM 28 R11 Chip Resistor, 6.8KΩ, 0805, 5% 1 TY-OHM 29 R12 Chip Resistor, 3KΩ, 0805 , 5% 1 TY-OHM 30 R14 Chip Resistor, 390Ω, 0805 , 5% 1 TY-OHM 31 R15 Chip Resistor, 100KΩ, 0805 , 5% 1 TY-OHM 32 T1 Transformer, Lp=0.5mH, EE16 1 Innovative PowerTM ActivePSRTM is a trademark of Active-Semi. -4- www.active-semi.com Copyright © 2014 Active-Semi, Inc.