FAN7621N Fairchild Semiconductor, FAN7621N Datasheet
FAN7621N
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FAN7621N Summary of contents
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... Desktop PCs and Servers Adapters Telecom Power Supplies Video Game Consoles Ordering Information Operating Junction Part Number Temperature FAN7621N FAN7621SJ -40°C ~ 130°C FAN7621SJX © 2009 Fairchild Semiconductor Corporation FAN7621 • Rev. 1.0.3 Description The FAN7621 is a pulse frequency modulation controller for high-efficiency half-bridge resonant converters ...
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... Figure 1. Typical Application Circuit (LLC Resonant Half-Bridge Converter) Block Diagram V I REF CTC I CTC 2I CTC OLP CON 6 - 0 OLP OVP © 2009 Fairchild Semiconductor Corporation FAN7621 • Rev. 1.0.3 Cr LVcc CON CTR sense 11.3 / 14. F/F - Time Delay 350ns Counter (1/4) Time ...
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... This pin is the supply voltage of the control IC connection This is the low-side gate driving signal connection This pin is the power ground. This pin is connected to the source of the low-side MOSFET. © 2009 Fairchild Semiconductor Corporation FAN7621 • Rev. 1.0.3 ( (2) CTR (3) HO (4) NC FAN7621 (5) NC (6) CON ( Figure 3. Package Diagram ...
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... Storage Temperature Range STG Note: 1. The maximum value of the recommended operating junction temperature is limited by thermal shutdown. Thermal Impedance Symbol θ Junction-to-Ambient Thermal Impedance JA © 2009 Fairchild Semiconductor Corporation FAN7621 • Rev. 1.0.3 =25 ° C unless otherwise specified. A Parameter Pin to Center Voltage 16-DIP 16-SOP (1) (1) ...
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... Low Level of High-Side Gate Driving V HOL Signal High Level of High-Side Gate Driving V LOH Signal (V -V LVCC LO Low Level of High-Side Gate Driving V LOL Signal © 2009 Fairchild Semiconductor Corporation FAN7621 • Rev. 1.0.3 Test Conditions CTR Supply Current (HV UV+) - 0.1V CC Supply Current (LV UV+) - 0.1V CC ...
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... SU Current Protection Latch Reset LV V PRSET Voltage Dead-Time Control Section D Dead Time T Note: 2. These parameters, although guaranteed, are not tested in production. © 2009 Fairchild Semiconductor Corporation FAN7621 • Rev. 1.0.3 (Continued) Test Conditions V =4V CON V > 3.5V CON LV > 21V CC (2) ...
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... Temp ( O Figure 6. High-Side V (HV CC 1.1 1.05 1 0.95 0.9 -50 - Temp ( O Figure 8. Low-Side V ( © 2009 Fairchild Semiconductor Corporation FAN7621 • Rev. 1.0.3 =25ºC. A 1.1 1.05 0.95 0 100 O C) Figure 5. Switching Frequency vs. Temperature 1.1 1.05 1 0.95 0 100 C) ) Start vs. Temperature Figure 7. High-Side ...
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... Temp ( O Figure 12. LV OVP Voltage vs. Temperature CC 1.1 1.05 1 0.95 0.9 -50 - Temp ( Figure 14. CON Pin Enable Voltage vs. Temperature © 2009 Fairchild Semiconductor Corporation FAN7621 • Rev. 1.0.3 (Continued) =25ºC. A 1.1 1.05 1 0.95 0 100 C) Figure 11. OLP Protection Voltage vs. Temperature 1.1 1.05 1 0.95 ...
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... ZVS region. The output voltage can be regulated by modulating the switching frequency. Figure 19 shows the typical circuit configuration for R coupler transistor is connected to the R the switching frequency. © 2009 Fairchild Semiconductor Corporation FAN7621 • Rev. 1.0.3 Gain 1.8 1.6 Dead t ime 1 ...
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... SKIP = + x 100 R R min max © 2009 Fairchild Semiconductor Corporation FAN7621 • Rev. 1.0 until the output pin, as shown (3) kHz ) ) of the resonant O (4) Remote On / Off : When an auxiliary power supply is used for standby, the main power stage using FAN7621 ...
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... sense I ds Figure 26. Full-Wave Sensing © 2009 Fairchild Semiconductor Corporation FAN7621 • Rev. 1.0.3 reaches the start 5.4 CC Voltage : For high-power applications, current sensing using a resistor may not be available due to the severe power dissipation in the resistor. In that case, indirect current sensing using the resonant capacitor voltage can ...
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... V to the controller is utilized. CC 5.9 Thermal Shutdown (TSD the temperature of the junction exceeds approximately 130 ° C, the thermal shutdown triggers. © 2009 Fairchild Semiconductor Corporation FAN7621 • Rev. 1.0.3 (OLP) : Overload is 6. Duty imbalance problems may occur due to the radiated noise from main transformer, the inequality of the secondary-side transformer, and so on ...
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... Typical Application Circuit (Half-Bridge LLC Resonant Converter) Application Device LCD TV FAN7621 Features High efficiency ( >94% at 400V Reduced EMI noise through zero-voltage-switching (ZVS) Enhanced system reliability with various protection functions © 2009 Fairchild Semiconductor Corporation FAN7621 • Rev. 1.0.3 Input Voltage Range Rated Output Power 390V DC (340~400V ) DC ...
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... N 10 → Primary-Side Inductance (L Primary-Side Effective Leakage (L For more detailed information regarding the transformer, visit contact sales@santronics-usa.com © 2009 Fairchild Semiconductor Corporation FAN7621 • Rev. 1.0.3 (Continued Figure 30. Transformer Construction Wire 0.08φ×88 (Litz Wire) 0.08φ×234 (Litz Wire) 0.08φ ...
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... Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. 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’ ...
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... Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. 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’ ...
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... Fairchild Semiconductor Corporation FAN7621 • Rev. 1.0.3 17 www.fairchildsemi.com ...