FAN4800AS Fairchild Semiconductor, FAN4800AS Datasheet
FAN4800AS
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FAN4800AS Summary of contents
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... PWM that makes the hold-up time longer. Brownout protection and PFC soft- start functions available in this series are not available in ML4800 and FAN4800. To evaluate FAN4800AS/CS/01S/02S for replacing existing FAN4800 and ML4800 boards, five things must be completed before the fine-tuning procedure: 1. ...
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... FAN4802SMY -40°C to +105°C Application Diagram © 2010 Fairchild Semiconductor Corporation FAN4800AS/CS/01S/02S • Rev. 1.0.1 16-Pin Dual Inline Package (DIP) 16-Pin Small Outline Package (SOP) 16-Pin Dual Inline Package (DIP) 16-Pin Small Outline Package (SOP) 16-Pin Dual Inline Package (DIP) ...
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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 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 DD TH-ON ...
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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 INV ...
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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 7.500 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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... Functional Description The FAN4800AS/CS/01S/02S consist of an average current controlled, continuous-boost, Power Factor Correction (PFC) front-end and a synchronized Pulse Width Modulator (PWM) back-end. The PWM can be used in current or voltage mode. In voltage mode, feedforward from the PFC output bus can help improve the line regulation of PWM ...
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... TriFault Detect™ To improve power supply reliability, reduce system component count, and simplify compliance to UL1950 safety standards; the FAN4800AS/CS/01S/02S includes TriFault Detect™ technology. This feature monitors FBPFC for certain PFC fault conditions feedback path failure, the output of the PFC could exceed safe operating limits ...
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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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... In voltage mode, feedforward from the PFC output bus is an excellent way to derive the timing ramp for the PWM stage. Generating V DD After turning on the FAN4800AS/CS/01S/02S at 11V, the operating voltage can vary from 9.3V to 28V. The threshold voltage of the V OVP comparator is 28V DD and its hysteresis is 1V ...
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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/. © 2010 Fairchild Semiconductor Corporation FAN4800AS/CS/01S/02S • Rev. 1.0.1 A 19.68 18. ...
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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/. © 2010 Fairchild Semiconductor Corporation FAN4800AS/CS/01S/02S • Rev. 1.0.1 18 www.fairchildsemi.com ...
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... Fairchild Semiconductor Corporation FAN4800AS/CS/01S/02S • Rev. 1.0.1 19 www.fairchildsemi.com ...