ACT511 Product Brief, 18-Feb-14 ActiveQRTM Quasi-Resonant PWM Controller FEATURES good margin. • Quasi-Resonant Operation ACT511 integrates comprehensive protection. In case of over temperature, over voltage, winding short, current sense resistor short, open loop and overload conditions, it would enter into auto restart mode including Cycle-by-Cycle current limiting. • Adjustable up to 75kHz Switching Frequency • Accurate OCP/OLP Protection • Integrated Patented Frequency Foldback ACT511 is to achieve no overshoot and very short rise time even with a big capacitive load (4000µF) with the built-in fast and soft start process. Technique • Integrated Patented Line and Primary Inductance Compensation The Quasi-Resonant (QR) operation mode can improve efficiency, reduce EMI and further reduce the components in input filter. • Built-in Soft-Start Circuit • Line Under-Voltage, Thermal, Output Overvoltage, Output Short Protections • • • • ACT511 is ideal for applications up to 60 Watts. Current Sense Resistor Short Protection Figure 1: Transformer Winding Short Protection Simplified Application Circuit 100mW Standby Power Complies with Global Energy Efficiency and CEC Average Efficiency Standards • Tiny SOT23-6 Packages APPLICATIONS • AC/DC Adaptors/Chargers for Cell Phones, Cordless Phone, PDAs, E-books • Adaptors for Portable Media Player, DSCs, Set-top boxes, DVD players, records • Linear Adapter Replacements GENERAL DESCRIPTION The ACT511 is a high performance peak current mode PWM controller. ACT511 applies ActiveQRTM and frequency foldback technique to reduce EMI and improve efficiency. ACT511’s maximum switching frequency is set at 90kHz. Very low standby power, good dynamic response and accurate voltage regulation is achieved with an opto-coupler and the secondary side control circuit. The idle mode operation enables low standby power of 100mW with small output voltage ripple. By applying frequency foldback and ActiveQRTM technology, ACT511 increases the average system efficiency compared to conventional solutions and exceeds the latest ES2.0 efficiency standard with Innovative PowerTM ActiveQRTM is a trademark of Active-Semi. -1- www.active-semi.com Copyright © 2014 Active-Semi, Inc. ACT511 Product Brief, 18-Feb-14 ORDERING INFORMATION PART NUMBER TEMPERATURE RANGE PACKAGE PINS PACKING METHOD ACT511US-T -40°C to 85°C SOT23-6 6 TUBE & REEL TOP MARK FSGT PIN CONFIGURATION SOT23-6 ACT511US PIN DESCRIPTIONS PIN NAME DESCRIPTION 1 CS 2 GND Ground. 3 GATE Gate Drive. Gate driver for the external MOSFET transistor. 4 VDD Power Supply. This pin provides bias power for the IC during startup and steady state operation. 5 VDET Valley Detector Pin. Connect this pin to a resistor divider network from the auxiliary winding to detect zero-crossing points for valley turn on operation. 6 FB Current Sense Pin. Connect an external resistor (RCS) between this pin and ground to set peak current limit for the primary switch. Feedback Pin. Connect this pin to optocouplers’s collector for output regulation. Innovative PowerTM ActiveQRTM is a trademark of Active-Semi. -2- www.active-semi.com Copyright © 2014 Active-Semi, Inc. ACT511 Product Brief, 18-Feb-14 Figure 4: Universal VAC Input, 5V/3A Output Adaptor Innovative PowerTM ActiveQRTM is a trademark of Active-Semi. -3- www.active-semi.com Copyright © 2014 Active-Semi, Inc. ACT511 Product Brief, 18-Feb-14 Table 1: ACT511 5V15W Bill of Materials ITEM REFERENCE DESCRIPTION QTY MANUFACTURER IC, ACT511, SOT23-6 1 Active-Semi Capacitor, Electrolytic, 15µF/400V, 12 × 14mm 2 KSC 1 U1 2 C1,C2 3 C3 Capacitor, Ceramic,1000pF/500V,0805,SMD 1 POE 4 C4 Capacitor, Electrolytic, 4.7µF/35V, 5 × 11mm 1 KSC 5 C5,C6 Capacitor, Electrolytic, 820µF/10V, 10 × 11.5mm 2 KSC 6 C7,C8 Capacitor, Ceramic, 0.1µF/25V,0805,SMD 2 POE 7 C9 Capacitor, Ceramic,1000pF/100V,0805,SMD 1 POE 8 Cfb Capacitor, Ceramic,1000pF/50V,0805,SMD 1 POE 9 D1-D4 Diode, Rectifier ,1000V1A, 1N4007, DO-41 4 Good-Ark 10 D5,D6 Diode, Ultra Fast, FR107,1000V/1.0A, DO-41 2 Good-Ark 11 D8 Diode, Schottky, 40V/30A, SBL3040, DO-220 1 Good-Ark 12 L1 DM Inductor, 1.5mH,R5 1 SoKa 13 L2 DM Inductor, 3µH, R5 1 SoKa 14 Q1 Mosfet Transisor, 4N65, TO-220F 1 ST 15 PCB1 PCB, L*W*T = 48.5х29х1.6mm, Cem-1, Rev:A 1 Jintong 16 F1 Fusible, 1A/250V 1 TY-OHM 17 R1 Carbon Resistor, 22Ω, 0805, 5% 1 TY-OHM 18 R2 Carbon Resistor, 750kΩ, 1W, 5% 1 TY-OHM 19 R3 Chip Resistor, 100Ω, 0805, 5% 1 TY-OHM 20 R4 Chip Resistor, 4.7Ω, 0805, 5% 1 TY-OHM 21 R5 Chip Resistor, 53.6kΩ, 0805, 1% 1 TY-OHM 22 R6 Chip Resistor, 9.95kΩ, 0805, 1% 1 TY-OHM 23 R7,R8 Chip Resistor, 1MΩ, 0805, 5% 2 TY-OHM 24 R9 Chip Resistor, 0.953Ω,1W, 1% 1 TY-OHM 25 R10,R12 Chip Resistor, 1.5KΩ, 0805, 5% 2 TY-OHM 26 Rgate Chip Resistor, 22kΩ, 0805, 5% 1 TY-OHM 27 R14 Chip Resistor, 3.3kΩ, 0805, 5% 1 TY-OHM 28 R15 Chip Resistor, 10.7kΩ, 0805, 1% 1 TY-OHM 29 R16 Chip Resistor, 10.5kΩ, 0805, 1% 1 TY-OHM 30 T1 Transformer, LP = 0.68mH, EE19 1 31 CY1 Y capacitance, 1000pF/400V,Y1 1 SEC 32 U2 Opto-coupler, PC817C CTR = 200 1 Sharp 33 U3 Voltage Regulator, TL431A, VREF = 2.5V 1 ST Innovative PowerTM ActiveQRTM is a trademark of Active-Semi. -4- www.active-semi.com Copyright © 2014 Active-Semi, Inc.