FSCM0565R

FSQ0565R, FSQ0765R — Green-Mode Farichild Power Switch (FPS™) for Quasi-Resonant Operation October 2007 FSQ0565R, FSQ0765R Green-Mode Fairchild Power Switch (FPS™) for Quasi-Resonant Operation - Low EMI and High Efficiency Features Optimized for Quasi-Resonant Converter (QRC) Low EMI through Variable Frequency Control and AVS (Alternating Valley Switching) High-Efficiency through Minimum Voltage Switching Narrow Frequency Variation Range over Wide Load and Input Voltage Variation Advanced Burst-Mode Operation for Low Standby Power Consumption Simple Scheme for Sync Voltage Detection Pulse-by-Pulse Current Limit Various Protection functions: Overload Protection (OLP), Over-Voltage Protection (OVP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD) with Hysteresis, Output Short Protection (OSP) Under-Voltage Lockout (UVLO) with Hysteresis Internal Start-up Circuit Internal High-Voltage Sense FET (650V) Built-in Soft-Start (15ms) Description A Quasi-Resonant Converter (QRC) generally shows lower EMI and higher power conversion efficiency than a conventional hard-switched converter with a fixed switching frequency. The FSQ-series is an integrated Pulse-Width Modulation (PWM) controller and SenseFET specifically designed for quasi-resonant operation and Alternating Valley Switching (AVS). The PWM controller includes an integrated fixed-frequency oscillator, Under-Voltage Lockout (UVLO), LeadingEdge Blanking (LEB), optimized gate driver, internal softstart, temperature-compensated precise current sources for a loop compensation, and self-protection circuitry. Compared with a discrete MOSFET and PWM controller solution, the FSQ-series can reduce total cost, component count, size, and weight; while simultaneously increasing efficiency, productivity, and system reliability. This device provides a basic platform that is well suited for cost-effective designs of quasi-resonant switching flyback converters. Applications Power Supply for LCD TV and Monitor, VCR, SVR, STB, and DVD & DVD Recorder Adapter Related Resourses Visit: http://www.fairchildsemi.com/apnotes/ for: AN-4134: Design Guidelines for Offline Forward Converters Using Fairchild Power Switch (FPS™) AN-4137: Design Guidelines for Offline Flyback Converters Using Fairchild Power Switch (FPS™) AN-4140: Transformer Design Consideration for Offline Flyback Converters Using Fairchild Power Switch (FPS™) AN-4141: Troubleshooting and Design Tips for Fairchild Power Switch (FPS™) Flyback Applications AN-4145: Electromagnetic Compatibility for Power Converters AN-4147: Design Guidelines for RCD Snubber of Flyback AN-4148: Audible Noise Reduction Techniques for Fairchild Power Switch Fairchild Power Switch(FPS™) Applications AN-4150: Design Guidelines for Flyback Converters Using FSQ-Series Fairchild Power Switch (FPS™) © 2007 Fairchild Semiconductor Corporation FSQ0565R, FSQ0765R Rev. 1.0.0 www.fairchildsemi.com FSQ0565R, FSQ0765R — Green-Mode Farichild Power Switch (FPS™) for Quasi-Resonant Operation Ordering Information Maximum Output Power(1) Product Number PKG.(5) Operating Current RDS(ON) Temp. Limit Max. 230VAC±15%(2) Adapter(3) 70W 80W 85-265VAC Adapter(3) 41W 48W Open Frame(4) 80W 90W Open Frame(4) 60W 70W Replaces Devices FSCM0565R FSDM0565RB FSCM0765R FSDM0765RB FSQ0565R TO-220F-6L -25 to +85°C FSQ0765R TO-220F-6L -25 to +85°C 3.0A 3.5A 2.2Ω 1.6Ω Notes: 1. The junction temperature can limit the maximum output power. 2. 230VAC or 100/115VAC with doubler. 3. Typical continuous power in a non-ventilated enclosed adapter measured at 50°C ambient temperature. 4. Maximum practical continuous power in an open-frame design at 50°C ambient. 5. Pb-free package per JEDEC J-STD-020B. © 2007 Fairchild Semiconductor Corporation FSQ0565R, FSQ0765R Rev. 1.0.0 2 www.fairchildsemi.com FSQ0565R, FSQ0765R — Green-Mode Farichild Power Switch (FPS™) for Quasi-Resonant Operation Application Diagram VO AC IN Vstr PWM FB VCC Drain Sync GND FSQ0765R Rev.00 Figure 1. Typical Flyback Application Internal Block Diagram Sync 5 Vstr 6 VCC 3 Drain 1 AVS 0.35/0.55 VBurst IFB 3R R tON < tOSP after SS SoftStart OSC Vref VCC Vref Idelay VCC good 8V/12V FB 4 PWM LEB 250ns SQ RQ Gate driver VOSP LPF AOCP VSD LPF VOVP TSD S Q 2 VOCP (1.1V) GND RQ VCC good FSQ0765R Rev.00 Figure 2. Internal Block Diagram © 2007 Fairchild Semiconductor Corporation FSQ0565R, FSQ0765R Rev. 1.0.0 3 www.fairchildsemi.com FSQ0565R, FSQ0765R — Green-Mode Farichild Power Switch (FPS™) for Quasi-Resonant Operation Pin Configuration 6. Vstr 5. Sync 4. FB 3. VCC 2. GND 1. Drain FSQ0765R Rev.00 Figure 3. Pin Configuration (Top View) Pin Definitions Pin # 1 2 3 Name Drain GND VCC Description SenseFET drain. High-voltage power SenseFET drain connection. Ground. This pin is the control ground and the SenseFET source. Power Supply. This pin is the positive supply input. This pin provides internal operating current for both start-up and steady-state operation. Feedback. This pin is internally connected to the inverting input of the PWM comparator. The collector of an opto-coupler is typically tied to this pin. For stable operation, a capacitor should be placed between this pin and GND. If the voltage of this pin reaches 6V, the overload protection triggers, which shuts down the FPS. Sync. This pin is internally connected to the sync-detect comparator for quasi-resonant switching. In normal quasi-resonant operation, the threshold of the sync comparator is 1.2V/1.0V. Start-up. This pin is connected directly, or through a resistor, to the high-voltage DC link. At start-up, the internal high-voltage current source supplies internal bias and charges the external capacitor connected to the VCC pin. Once VCC reaches 12V, the internal current source is disabled. It is not recommended to connect Vstr and Drain together. 4 FB 5 Sync 6 Vstr © 2007 Fairchild Semiconductor Corporation FSQ0565R, FSQ0765R Rev. 1.0.0 4 www.fairchildsemi.com FSQ0565R, FSQ0765R — Green-Mode Farichild Power Switch (FPS™) for Quasi-Resonant Operation Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. TA = 25°C, unless otherwise specified. Symbol Vstr VDS VCC VFB VSync IDM Vstr Pin Voltage Drain Pin Voltage Supply Voltage Parameter Min. 500 650 Max. Unit V V 20 -0.3 -0.3 FSQ0565R FSQ0765R FSQ0565R TC = 25°C TC = 100°C TC = 25°C TC = 100°C 13 11 11 15 2.8 1.7 3.8 2.4 190 370 45 Internally limited -25 -55 2.0 2.0 +85 +150 V V V A A A A mJ mJ W °C °C °C kV kV Feedback Voltage Range Sync Pin Voltage Drain Current Pulsed ID Continuous Drain Current(6) FSQ0765R EAS PD TJ TA TSTG ESD Single Pulsed Avalanche Energy(7) Operating Junction Temperature Operating Ambient Temperature Storage Temperature FSQ0565R FSQ0765R Total Power Dissipation(Tc=25oC) Electrostatic Discharge Capability, Human Body Model Electrostatic Discharge Capability, Charged Device Model Notes: 6. Repetitive rating: Pulse width limited by maximum junction temperature. 7. L=14mH, starting TJ=25°C. Thermal Impedance TA = 25°C unless otherwise specified. Symbol θJA θJC Parameter Junction-to-Ambient Thermal Junction-to-Case Thermal Resistance(8) Resistance(9) Package TO-220F-6L Value 50 2.8 Unit °C/W °C/W Notes: 8. Free standing with no heat-sink under natural convection. 9. Infinite cooling condition - refer to the SEMI G30-88. © 2007 Fairchild Semiconductor Corporation FSQ0565R, FSQ0765R Rev. 1.0.0 5 www.fairchildsemi.com FSQ0565R, FSQ0765R — Green-Mode Farichild Power Switch (FPS™) for Quasi-Resonant Operation Electrical Characteristics TA = 25°C unless otherwise specified. Symbol SENSEFET SECTION BVDSS IDSS RDS(ON) COSS td(on) tr td(off) tf Parameter Drain Source Breakdown Voltage Zero-Gate-Voltage Drain Current Drain-Source On-State Resistance Output Capacitance Turn-On Delay Time Rise Time Turn-Off Delay Time Fall Time FSQ0565R FSQ0765R FSQ0565R FSQ0765R FSQ0565R FSQ0765R FSQ0565R FSQ0765R FSQ0565R FSQ0765R FSQ0565R FSQ0765R Condition VCC = 0V, ID = 100µA VDS = 560V TJ = 25°C, ID = 0.5A TJ = 25°C, ID = 0.5A VGS = 0V, VDS = 25V, f = 1MHz VDD = 350V, ID = 25mA VDD = 350V, ID = 25mA VDD = 350V, ID = 25mA VDD = 350V, ID = 25mA Min. Typ. Max. Unit 650 250 1.76 1.4 78 100 22 25 52 60 95 115 50 65 8.8 13.2 59.6 10.0 15.0 6.0 66.7 ±5 4.0 1.2 13.5 700 11 900 12 8 17.5 0.45 0.25 0.55 0.35 200 0.65 0.45 20.5 1100 0 13 9 7 75.8 ±10 11.2 16.8 2.20 1.6 V µA Ω pF ns ns ns ns CONTROL SECTION tON.MAX tB tW fS ΔfS tAVS VAVS tSW IFB DMIN VSTART VSTOP tS/S VBURH VBURL Hysteresis Burst-Mode Voltages Maximum On Time Blanking Time Detection Time Window Initial Switching Frequency Switching Frequency AVS Triggering Threshold(9) Variation(9) On Time Feedback Voltage -25°C < TJ < 85°C at VIN = 240VDC, Lm = 360μH (AVS triggered when VAVS>spec & tAVS