FAN4800CS Fairchild Semiconductor, FAN4800CS Datasheet
FAN4800CS
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FAN4800CS Summary of contents
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... Improved Efficiency at Light Load f =4•f =4•f for FAN4800AS/01S RTCT PFC PWM f =4•f =2•f for FAN4800CS/02S RTCT PFC PWM Applications Desktop PC Power Supply Internet Server Power Supply LCD TV, Monitor Power Supply UPS Battery Charger DC Motor Power Supply Monitor Power Supply ...
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... Ordering Information Part Number Operating Temperature Range FAN4800ASNY -40°C to +105°C FAN4800ASMY -40°C to +105°C FAN4800CSNY -40°C to +105°C FAN4800CSMY -40°C to +105°C FAN4801SNY -40°C to +105°C FAN4801SMY -40°C to +105°C FAN4802SNY -40°C to +105°C FAN4802SMY -40°C to +105°C Application Diagram © ...
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... Application Diagram © 2010 Fairchild Semiconductor Corporation FAN4800AS/CS/01S/02S • Rev. 1.0.1 VEA IEA FBPFC IAC VREF ISENSE VRMS VDD SS OPFC FBPWM OPWM RT/CT GND RAMP ILIMIT VREF VREF Figure 2. Typical Application, Voltage Mode 3 VDD www.fairchildsemi.com ...
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... Block Diagram © 2010 Fairchild Semiconductor Corporation FAN4800AS/CS/01S/02S • Rev. 1.0.1 Figure 3. FAN4800AS/CS Function Block Diagram Figure 4. FAN4801S/02S Function Block Diagram 4 www.fairchildsemi.com ...
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... Marking Information © 2010 Fairchild Semiconductor Corporation FAN4800AS/CS/01S/02S • Rev. 1.0.1 – Fairchild Logo F Z – Plant Code X – 1-Digit Year Code – Package Type (N:DIP) P – Y: Green Package M Figure 5. DIP Top Mark – Fairchild Logo F Z – Plant Code X – ...
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... PFC error amplifier. This pin is connected to the PFC output through a divider network. Output of PFC Voltage Amplifier. The error amplifier output for PFC voltage feedback loop. 16 VEA A compensation network is connected between this pin and ground. © 2010 Fairchild Semiconductor Corporation FAN4800AS/CS/01S/02S • Rev. 1.0.1 Figure 7. Pin Configuration (Top View) 6 and C ...
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... The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol T Operating Ambient Temperature A © 2010 Fairchild Semiconductor Corporation FAN4800AS/CS/01S/02S • Rev. 1.0.1 Parameter < 50°C A DIP SOP ...
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... Low-Power Detect Comparator V VEA Voltage OFF OPFC VEAOFF V OK Comparator IN Voltage Level on FBPFC to V RD-FBPFC Enable OPWM During Startup ΔV Hysteresis RD-FBPFC © 2010 Fairchild Semiconductor Corporation FAN4800AS/CS/01S/02S • Rev. 1.0.1 = 25° =6.8kΩ, and Conditions V =V -0.1V; OPFC OPWM ...
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... OFFSET PFC I Comparator LIMIT Peak Current Limit Threshold V PFC-ILIMIT Voltage, Cycle-by-Cycle Limit ΔV PFC I -Gain Modulator Output LIMIT PK © 2010 Fairchild Semiconductor Corporation FAN4800AS/CS/01S/02S • Rev. 1.0.1 (Continued) = 25° =6.8kΩ, and Conditions ( NONINV ...
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... Maximum Duty Cycle PWM-MAX V PWM Comparator Level Shift PWM-LS Notes: 3. This parameter, although guaranteed by design, is not 100% production tested. 4. This GAIN is the maximum gain of modulation with a given V © 2010 Fairchild Semiconductor Corporation FAN4800AS/CS/01S/02S • Rev. 1.0.1 (Continued) = 25° =6.8kΩ, and C =1000pF ...
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... Figure 14. Gm vs. Temperature V -1.177 -1.178 -1.179 -1.180 -1.181 -1.182 -1.183 -40 -25 - Figure 16. V PFC-ILIMIT © 2010 Fairchild Semiconductor Corporation FAN4800AS/CS/01S/02S • Rev. 1.0.1 28.04 28.02 28.00 27.98 27.96 27.94 27.92 27.90 27.88 27.86 50℃ 65℃ 80℃ 95℃ 110℃ 125℃ -40℃ -25℃ -10℃ 7.520 7.515 7.510 7.505 7 ...
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... Figure 24. I vs. Temperature SS © 2010 Fairchild Semiconductor Corporation FAN4800AS/CS/01S/02S • Rev. 1.0.1 867.5 867.0 866.5 866.0 865.5 865.0 864.5 864.0 863.5 863.0 862.5 862.0 50℃ 65℃ 80℃ 95℃ 110℃ 125℃ -40℃ -25℃ -10℃ ...
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... PFC from the power line. The general form of the output of the gain modulator is: © 2010 Fairchild Semiconductor Corporation FAN4800AS/CS/01S/02S • Rev. 1.0.1 I GAINMOD Note that the output current of the gain modulator is limited around 159μ ...
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... PFC Brownout The AC UVP comparator monitors the AC input voltage. The PFC is disabled as AC input lowers, causing V be less than 1.05V. © 2010 Fairchild Semiconductor Corporation FAN4800AS/CS/01S/02S • Rev. 1.0.1 Error Amplifier Compensation The PWM loading of the PFC can be modeled as a negative resistor because an increase in the input voltage to the PWM causes a decrease in the input current ...
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... © 2010 Fairchild Semiconductor Corporation FAN4800AS/CS/01S/02S • Rev. 1.0.1 Pulse Width Modulator (PWM) The operation of the PWM section is straightforward, but there are several points that should be noted. Foremost among these is the inherent synchronization of PWM with the PFC section of the device, from which it also derives its basic timing ...
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... FAN4800AS/CS/01S/02S system. The bootstrap winding can be taped from the PFC boost choke or the transformer of the DC-to-DC stage. © 2010 Fairchild Semiconductor Corporation FAN4800AS/CS/01S/02S • Rev. 1.0.1 Leading/Trailing Edge Modulation Conventional PWM techniques employ trailing-edge modulation, in which the switch turns on right after the trailing edge of the system clock ...
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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 FAN4800AS/CS/01S/02S • Rev. 1.0.1 19 www.fairchildsemi.com ...