FSQ0765RS Fairchild Semiconductor, FSQ0765RS Datasheet
FSQ0765RS
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FSQ0765RS Summary of contents
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... FPS Applications AN-4150: Design Guidelines for Flyback Converters ! Using FSQ-series Fairchild Power Switch (FPS © 2008 Fairchild Semiconductor Corporation FSQ0765RS • Rev. 1.0.2 Low EMI and High Efficiency 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 ...
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... Ordering Information Product Operating (5) PKG. Number FSQ0765RSWDTU TO-220F-6L -25 to +85°C Notes: 1. The junction temperature can limit the maximum output power. 2. 230V or 100/115V with doubler 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. ...
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... I I delay < OSP after SS LPF V OSP OVP © 2008 Fairchild Semiconductor Corporation FSQ0765RS • Rev. 1.0.2 V str Drain PWM Sync GND FSQ0765R Rev.00 Figure 1. Typical Flyback Application V Sync str 5 6 AVS OSC PWM S Q Soft- ...
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... V str nal capacitor connected to the V disabled not recommended to connect V © 2008 Fairchild Semiconductor Corporation FSQ0765RS • Rev. 1.0.2 FSQ0765R Rev.00 Figure 3. Pin Configuration (Top View) Description pin. Once ...
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... Junction-to-Ambient Thermal Resistance JA θ Junction-to-Case Thermal Resistance JC Notes: 8. Free standing with no heat-sink under natural convection. 9. Infinite cooling condition - refer to the SEMI G30-88. © 2008 Fairchild Semiconductor Corporation FSQ0765RS • Rev. 1.0.2 = 25°C, unless otherwise specified. A Parameter T = 25° 100°C ...
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... V STOP t Internal Soft-Start Time S/S V Over-Voltage Protection OVP BURST-MODE SECTION V BURH V Burst-Mode Voltages BURL V B_HYS Note: 10. Propagation delay in the control IC. © 2008 Fairchild Semiconductor Corporation FSQ0765RS • Rev. 1.0.2 Conditions 100µ 520V 25° 25V 1MHz ...
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... Start Current START I Startup Charging Current CH V Minimum V Supply Voltage STR STR Notes: 11.Guaranteed by design, but not tested in production. 12. Includes gate turn-on time. © 2008 Fairchild Semiconductor Corporation FSQ0765RS • Rev. 1.0.2 (Continued) Conditions T = 25°C, di/dt = 460mA/µ 15V (11 25° ...
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... Hybrid Control Burst-Mode Burst-Mode Operation Operation Strong Protections OLP, OVP 145°C without TSD Hysteresis © 2008 Fairchild Semiconductor Corporation FSQ0765RS • Rev. 1.0.2 FSQ-Series FSQ-Series Advantages Improved efficiency by valley switching ! Quasi-Resonant Reduced EMI noise ! Operation Reduced components to detect valley point ! Valley switching ...
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... Temperature [°C] Figure 15. UVLO Stop Threshold Voltage (V ) vs. T STOP 1.2 1.0 0.8 0.6 0.4 0.2 0.0 - Temperature [°C] Figure 17. Initial Switching Frequency (f © 2008 Fairchild Semiconductor Corporation FSQ0765RS • Rev. 1.0.2 = 25°C. A 1.2 1.0 0.8 0.6 0.4 0.2 0.0 75 100 125 -25 ) vs. T Figure 14. UVLO Start Threshold Voltage OP A 1.2 1.0 0.8 0.6 0.4 0.2 0.0 75 100 125 -25 Figure 16. Startup Charging Current ( ...
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... Temperature [°C] Figure 21. Shutdown Delay Current (I 1.2 1.0 0.8 0.6 0.4 0.2 0.0 - Temperature [°C] Figure 23. Burst-Mode Low Threshold Voltage (V ) vs. T burl © 2008 Fairchild Semiconductor Corporation FSQ0765RS • Rev. 1.0.2 (Continued) = 25°C. A 1.2 1.0 0.8 0.6 0.4 0.2 0.0 75 100 125 -25 ) vs. T Figure 20. Feedback Source Current ( 1.2 1.0 0.8 0.6 0.4 0.2 0.0 75 100 125 - ...
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... Temperature [°C] Figure 27. Shutdown Feedback Voltage (V 1.2 1.0 0.8 0.6 0.4 0.2 0.0 - Temperature [°C] Figure 29. Sync High Threshold Voltage vs. T SH2 © 2008 Fairchild Semiconductor Corporation FSQ0765RS • Rev. 1.0.2 (Continued) = 25°C. A 1.2 1.0 0.8 0.6 0.4 0.2 0.0 75 100 125 -25 Figure 26. Sync Low Threshold Voltage 1 A 1.2 1.0 0.8 0.6 0.4 0.2 0.0 75 100 125 - ...
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... KA431 - V SD FSQ0765R Rev. 00 Figure 32. Pulse-Width-Modulation (PWM) Circuit © 2008 Fairchild Semiconductor Corporation FSQ0765RS • Rev. 1.0.2 2.1 Pulse-by-Pulse Current Limit: Because current- mode control is employed, the peak current through the SenseFET is limited by the inverting input of PWM comparator (V pin that the 0.9mA current source flows only through the ...
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... sync internal delay Figure 35. V < 4. sync © 2008 Fairchild Semiconductor Corporation FSQ0765RS • Rev. 1.0 case of a heavy W and waits for B B goes below sync , the Figure 36. After V 4. Protection Circuits: The FSQ-series has several I DS ...
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... The voltage across the resistor is compared with a preset AOCP level. If the sensing resistor voltage is greater than the AOCP level, the set signal is applied to the latch, resulting in the shutdown of the SMPS. © 2008 Fairchild Semiconductor Corporation FSQ0765RS • Rev. 1.0.2 3R PWM R AOCP FSQ0765R Rev.00 Figure 39 ...
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... Once it passes V BURH resumes. The feedback voltage then falls and the process repeats. Burst-mode operation alternately enables and disables switching of the power SenseFET, thereby reducing switching loss in standby mode. © 2008 Fairchild Semiconductor Corporation FSQ0765RS • Rev. 1.0 set ...
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... B GateX2: Counting V every 2 pulses independent on other signals. gate FSQ0765R Rev. 00 © 2008 Fairchild Semiconductor Corporation FSQ0765RS • Rev. 1.0.2 8. AVS (Alternating Valley Switching): Due to the quasi-resonant operation with limited frequency, the switching frequency varies depending on input voltage load transition, and so on. At high input voltage, the ...
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... When the heat sink is connected to the ground, it should be connected to the power ground. If possible, avoid using jumper wires for power ground and drain. Mylar® registered trademark of DuPont Teijin Films. © 2008 Fairchild Semiconductor Corporation FSQ0765RS • Rev. 1.0.2 are better for smooth CC 17 Figure 45. Recommended PCB Layout ...
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... Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2008 Fairchild Semiconductor Corporation FSQ0765RS • Rev. 1.0 .00 ) Ø ...
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... Fairchild Semiconductor Corporation FSQ0765RS • Rev. 1.0.2 19 www.fairchildsemi.com ...