FAN4800IN Fairchild Semiconductor, FAN4800IN Datasheet
FAN4800IN
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FAN4800IN Summary of contents
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... Battery Charger DC Motor Power Supply Monitor Power Supply Telecom System Power Supply Distributed Power Ordering Information Operating Part Number Temp. Range FAN4800IN -40°C to +125°C FAN4800IM -40°C to +125°C FAN4800IMX -40°C to +125°C © 2005 Fairchild Semiconductor Corporation FAN4800 Rev. 1.0.5 Description The FAN4800 is a controller for power-factor-corrected, switched-mode power supplies ...
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... I SENSE 3 RAMP1 7 RAMP2 350 8 0. 20μA SS 350 5 V REF DC I LIMIT 9 © 2005 Fairchild Semiconductor Corporation FAN4800 Rev. 1.0 POWER FACTOR CORRECTOR EAO V OVP 2.78V 17.9V Low Power TRI-FAULT Detector 0.5V PFC CMP 3.5k OSCILLATOR DUTY CYCLE LIMIT PWM CMP SS CMP 1 ...
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... I EAO SENSE 4 V RMS RAMP1 7 (RtCt) RAMP2 8 (PWM RAMP LIMIT 10 GND 11 PWM OUT 12 PFC OUT REF EAO © 2005 Fairchild Semiconductor Corporation FAN4800 Rev. 1.0 EAO EAO SENSE REF RMS PFC OUT PWM OUT RAMP1 GND 10 8 RAMP2 LIMIT FAN4800 Rev.03 Figure 2 ...
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... PFC OUT, PWM OUT Energy per Cycle T Junction Temperature J T Storage Temperature Range STG T Operating Temperature Range A T Lead Temperature (Soldering,10 seconds) L θ Thermal Resistance (θ JA © 2005 Fairchild Semiconductor Corporation FAN4800 Rev. 1.0.5 Parameter GND-0.3 ) Plastic DIP JA 4 Min. Max. Unit 5.5 V -3.0 ...
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... LOW-POWER DETECT COMPARATOR V (lp) Threshold Voltage th VCC OVP COMPARATOR V Threshold Voltage CC_OVP HY(V ) Hysteresis CC_OVP TRI-FAULT DETECT t Time to Fault Detect HIGH d(F) F(L) Fault Detect LOW © 2005 Fairchild Semiconductor Corporation FAN4800 Rev. 1.0.5 = 15V 52.3KΩ Condition ( 25° 25° ...
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... Line Regulation ref1 ΔV Load Regulation ref2 ΔV Temperature Stability ref4 (1) V Total Variation ref2 ΔV Long Term Stability ref5 © 2005 Fairchild Semiconductor Corporation FAN4800 Rev. 1.0.5 (Continued) = 15V 52.3kΩ Condition – Gain Modulator I = 100μ RMS 25°C ...
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... V Under-Voltage Lockout Hysteresis th(hys) Notes: 1. This parameter, although guaranteed by design, is not 100% production tested. 2. Includes all bias currents to other circuits connected to the V 3. Gain = K × 5.375V SENSE © 2005 Fairchild Semiconductor Corporation FAN4800 Rev. 1.0.5 (Continued) = 15V 52.3kΩ Condition V > ...
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... V (V) RMS Figure 5. Gain Modulator Transfer Characteristic (K) − GAINMOD OFFSET K × − 0.625) AC © 2005 Fairchild Semiconductor Corporation FAN4800 Rev. 1.0.5 100 -10 2.6 2.7 2.8 2.9 3.0 -0.8 Figure 4. Current Error Amplifier (gmi) 2.2 2 ...
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... Fairchild Semiconductor Corporation FAN4800 Rev. 1.0.5 One of these conditions is that the output voltage of the boost converter must be set higher than the peak value of the line voltage ...
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... I pin. SENSE The negative voltage on I SENSE currents flowing in the PFC circuit and is typically derived © 2005 Fairchild Semiconductor Corporation FAN4800 Rev. 1.0.5 . The from a current sense resistor in series with the negative EAO terminal of the input bridge rectifier. The inverting input of the current error amplifier is a vir- tual ground ...
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... Figure 4. This raises the gain-bandwidth product of the voltage loop, resulting in a much more rapid voltage loop response to such perturbations than would occur with conventional linear gain characteristics. © 2005 Fairchild Semiconductor Corporation FAN4800 Rev. 1.0 POWER FACTOR CORRECTOR ...
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... SENSE 2) To reduce L, the boost inductor: The I can reduce the boost inductor value since the I filter behaves like an integrator before the I which is the input of the current error amplifier, I © 2005 Fairchild Semiconductor Corporation FAN4800 Rev. 1.0.5 The I SENSE the I SENSE ...
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... PWM power cycle. When the DC I LIMIT © 2005 Fairchild Semiconductor Corporation FAN4800 Rev. 1.0.5 cycle current, it also softly discharges the voltage of the soft-start capacitor. It limits the PWM duty cycle mode and the power dissipation is reduced during the dead- short condition ...
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... In most applications, an electrolytic capacitor of between 47μF and 220μF is also required across the part both for filtering and as a part of the start-up boot- strap circuitry. © 2005 Fairchild Semiconductor Corporation FAN4800 Rev. 1.0.5 2.8 Leading/Trailing 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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... SW2 VIN DC SW1 REF U3 VEAO EA RAMP OSC CLK U4 SW2 VIN DC SW1 U3 VEAO EA REF RAMP OSC CLK U4 © 2005 Fairchild Semiconductor Corporation FAN4800 Rev. 1.0 DFF CMP CLK Figure 10. Typical Trailing-Edge Control Scheme DFF CMP CLK Figure 11. Typical Leading-Edge Control Scheme 15 RAMP ...
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... Typical Application Circuit © 2005 Fairchild Semiconductor Corporation FAN4800 Rev. 1.0.5 Figure 12. Current-Mode Application 16 www.fairchildsemi.com ...
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... Typical Application Circuit © 2005 Fairchild Semiconductor Corporation FAN4800 Rev. 1.0.5 (Continued) Figure 13. Voltage-Mode Application 17 www.fairchildsemi.com ...
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... Package Dimensions 16-Pin DIP Dimensions are in inches (millimeters) unless otherwise specified. Figure 14. 16-Lead Plastic Dual In-Line Package (DIP) © 2005 Fairchild Semiconductor Corporation FAN4800 Rev. 1.0.5 18 www.fairchildsemi.com ...
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... Package Dimensions (Continued) 16-Pin SOIC (Wide) Dimensions are in inches (millimeters) unless otherwise specified. Figure 15. 16-Lead Small Outline Integrated Circuit (SOIC) © 2005 Fairchild Semiconductor Corporation FAN4800 Rev. 1.0.5 19 www.fairchildsemi.com ...
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... TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended exhaustive list of all such trademarks. ACEx GlobalOptoisolator ActiveArray GTO Bottomless HiSeC 2 Build it Now I C CoolFET i-Lo CROSSVOLT ImpliedDisconnect DOME IntelliMAX EcoSPARK ISOPLANAR 2 E CMOS ...