FSQ0765RQ Fairchild Semiconductor, FSQ0765RQ Datasheet
FSQ0765RQ
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FSQ0765RQ Summary of contents
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... Applications AN-4150: Design Guidelines for Flyback Converters ! Using FSQ-Series Fairchild Power Switch (FPS © 2008 Fairchild Semiconductor Corporation FSQ0765RQ Rev. 1.0.1 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 FSQ0765RQWDTU 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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... Burst CC ref I I delay < OSP after SS LPF V OSP OVP © 2008 Fairchild Semiconductor Corporation FSQ0765RQ Rev. 1.0.1 V str Drain PWM Sync GND Figure 1. Typical Flyback Application Sync 5 AVS OSC PWM Soft- LEB Start 250ns ...
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... V str capacitor connected to the not recommended to connect V © 2008 Fairchild Semiconductor Corporation FSQ0765RQ Rev. 1.0.1 FSQ0765R Rev.00 Figure 3. Pin Configuration (Top View) Description pin. Once V reaches 12V, the internal current source is disabled and Drain together ...
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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 FSQ0765RQ Rev. 1.0.1 = 25°C, unless otherwise specified. A Parameter T = 25° 100°C ...
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... MIN V START UVLO Threshold Voltage V STOP t Internal Soft-Start Time S/S BURST-MODE SECTION V BURH V Burst-Mode Voltages BURL Hysteresis Note: 10. Propagation delay in the control IC. © 2008 Fairchild Semiconductor Corporation FSQ0765RQ Rev. 1.0.1 Condition 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 FSQ0765RQ Rev. 1.0.1 (Continued) Condition T = 25°C, di/dt = 460mA/µ 15V (11 25°C ...
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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 FSQ0765RQ Rev. 1.0.1 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 6. 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 8. Initial Switching Frequency (f © 2008 Fairchild Semiconductor Corporation FSQ0765RQ Rev. 1.0.1 = 25°C. A 1.2 1.0 0.8 0.6 0.4 0.2 0.0 75 100 125 -25 ) vs. T Figure 5. 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 7. Startup Charging Current ( ...
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... Temperature [°C] Figure 12. Shutdown Delay Current (I 1.2 1.0 0.8 0.6 0.4 0.2 0.0 - Temperature [°C] Figure 14. Burst-Mode Low Threshold Voltage (V ) vs. T burl © 2008 Fairchild Semiconductor Corporation FSQ0765RQ Rev. 1.0.1 (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 11. Feedback Source Current ( 1.2 1.0 0.8 0.6 0.4 0.2 0.0 75 100 125 -25 ) vs. T Figure 13 ...
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... Temperature [°C] Figure 18. Shutdown Feedback Voltage (V 1.2 1.0 0.8 0.6 0.4 0.2 0.0 - Temperature [°C] Figure 20. Sync High Threshold Voltage vs. T SH2 © 2008 Fairchild Semiconductor Corporation FSQ0765RQ Rev. 1.0.1 (Continued) = 25°C. A 1.2 1.0 0.8 0.6 0.4 0.2 0.0 75 100 125 -25 Figure 17. Sync Low Threshold Voltage 1 A 1.2 1.0 0.8 0.6 0.4 0.2 0.0 75 100 125 -25 ) vs. T Figure 19 ...
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... V *. Therefore, the peak value of the current FB through the SenseFET is limited. © 2008 Fairchild Semiconductor Corporation FSQ0765RQ Rev. 1.0.1 2.2 Leading-Edge Blanking (LEB): At the instant the internal SenseFET is turned on, a high-current spike usually occurs through the SenseFET, caused by primary-side capacitance and secondary-side rectifier ...
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... sync internal delay Figure 26. V < 4. sync © 2008 Fairchild Semiconductor Corporation FSQ0765RQ Rev. 1.0 case of a heavy W and waits for B B goes below 4.4V sync , the Figure 27. 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 FSQ0765RQ Rev. 1.0.1 3R PWM R AOCP FSQ0765R Rev.00 Figure 30 ...
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... This mode helps prevent transformer saturation and reduces stress on the secondary diode during startup. © 2008 Fairchild Semiconductor Corporation FSQ0765RQ Rev. 1.0.1 6. Burst Operation: To minimize power dissipation in standby mode, the FPS enters burst-mode operation. As the load decreases, the feedback voltage decreases. As ...
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... B GateX2: Counting V every 2 pulses independent on other signals . gate FSQ0765R Rev. 00 © 2008 Fairchild Semiconductor Corporation FSQ0765RQ Rev. 1.0.1 8. AVS (Alternating Valley Switching): Due to the quasi-resonant operation with limited frequency, the (Case D). Therefore, W switching frequency varies depending on input voltage, load transition, and so on. At high input voltage, the switching on time is relatively small compared to low input voltage ...
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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 FSQ0765RQ Rev. 1.0.1 controller and are better for smooth CC 17 Figure 37 ...
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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 FSQ0765RQ Rev. 1.0.1 Figure 38. 6-Lead, TO-220 Package 18 www.fairchildsemi.com ...
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... Fairchild Semiconductor Corporation FSQ0765RQ Rev. 1.0.1 19 www.fairchildsemi.com ...