FAN6862R Fairchild Semiconductor, FAN6862R Datasheet
FAN6862R
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FAN6862R Summary of contents
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... UVLO lower limit. This green-mode function enables power supplies to meet international power conservation requirements. The FAN6862R/L is designed for SMPS and integrates a frequency-hopping function that helps reduce EMI emission of a power supply with minimum line filters. The built-in synchronized slope compensation is proprietary sawtooth compensation for constant output power limit over universal AC input range ...
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... Typical Application Block Diagram © 2009 Fairchild Semiconductor Corporation FAN6862R/L • Rev. 1.0.0 Figure 1. Typical Application Figure 2. Block Diagram 2 www.fairchildsemi.com ...
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... Power Supply Power supply 6 GATE Driver Output The totem-pole output driver for driving the power MOSFET. © 2009 Fairchild Semiconductor Corporation FAN6862R/L • Rev. 1.0.0 Figure 3. Top Mark Figure 4. Pin Assignments Description Ground The FB pin provides the output voltage regulation signal. It provides feedback to the internal PWM comparator for control of the duty cycle ...
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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 © 2009 Fairchild Semiconductor Corporation FAN6862R/L • Rev. 1.0.0 Parameter <50°C A Parameter 4 Min. Max. ...
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... FB-N Reduction V FB Voltage at f FB-G OSC Threshold Voltage for Zero Duty FB-ZDC f Frequency Variation vs Frequency Variation vs. Temperature f DT Deviation © 2009 Fairchild Semiconductor Corporation FAN6862R/L • Rev. 1.0.0 Parameter Test Condition V DD-ON C =1nF L GATE Open =5V DD Duty>51% Duty=0% Duty=DCY ...
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... Threshold Voltage for Over-Temperature V OTP Protection t Over-Temperature Debounce Time DOTP nd 2 Threshold Voltage for Over- V OTP2 Temperature Protection Over-Temperature Debounce Time DOTP2 © 2009 Fairchild Semiconductor Corporation FAN6862R/L • Rev. 1.0.0 (Continued) Parameter Test Condition V =15V =8V =1nF L C =1nF L V =20V DD T =25° ...
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... Turn-On Threshold Voltage (V vs. Temperature 4.5 4.1 3.7 3.3 2.9 2.5 -40 -30 - Temperature (ºC) Figure 7. Operating Current ( -40 -30 - Temperature (ºC) Figure 9. Center Frequency (f © 2009 Fairchild Semiconductor Corporation FAN6862R/L • Rev. 1.0.0 9.5 9.1 8.7 8.3 7.9 7 100 125 -40 ) Figure 6. DD-ON 26 25.6 25.2 24.8 24 100 125 -40 ) vs. Temperature Figure 8. DD-OP 2.7 2 ...
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... Temperature (ºC) Figure 13. Open-Loop Protection Delay Time (t vs. Temperature 0.55 0.51 0.47 0.43 0.39 0.35 -40 -30 - Temperature (ºC) Figure 15. Valley Threshold Voltage for Current Limit (V ) vs. Temperature STHVA © 2009 Fairchild Semiconductor Corporation FAN6862R/L • Rev. 1.0.0 (Continued) 4.9 4.8 4.7 4.6 4.5 4.4 4 100 125 - vs. Temperature Figure 12. Threshold Voltage for Open-Loop FB-G 0.6 ...
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... Temperature (ºC) Figure 17. Maximum Duty Cycle (DCY vs. Temperature -40 -30 - Temperature (ºC) Figure 19. Falling Time (t © 2009 Fairchild Semiconductor Corporation FAN6862R/L • Rev. 1.0.0 (Continued) 180 160 140 120 100 100 125 -40 ) Figure 18. Rising Time (t MAX 120 ...
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... PWM frequency starts to linearly decrease from 65KHz to 22.5kHz to reduce the switching losses decreases below V (2.1V), the switching frequency FB-G is fixed at 22.5kHz and FAN6862R/L enters “deep” green mode, where the operating current decreases to 2.5mA (maximum), further reducing the standby power consumption decreases below V FB FAN6862R/L enters burst-mode operation ...
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... Self-protective functions include V Protection (OVP), Open-Loop / Overload Protection (OLP), Over-Current Protection (OCP), Short-Circuit Protection, and Over-Temperature Protection (OTP). FAN6862R uses auto-restart mode protections and FAN6862L uses latch-mode protections. Auto-Restart Mode Protection: Once a fault condition is detected, switching is terminated and the MOSFET remains off. This causes V DD power is delivered from auxiliary winding ...
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... Thus, RC filter with a small RC time constant is enough for current sensing. Figure 28. Current Sense R-C Filter Soft-Start The FAN6862R/L has an internal soft-start circuit that increases pulse-by-pulse inverting input voltage slowly after it starts. The typical soft-start time is 5ms. The pulsewidth to the power ...
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... 85.29% (Energy star V2. 25% 50% Figure 29. Measured Efficiency and Over-Current Protection © 2009 Fairchild Semiconductor Corporation FAN6862R/L • Rev. 1.0.0 Input Voltage Range 90~265V 75% 100% Load (%) Figure 30. Schematic of Typical Application Circuit 13 Output 19V/2.1A (40W Over Current Protection 4 ...
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... Fly- Fly Primary-Side Inductance Primary-Side Effective Leakage © 2009 Fairchild Semiconductor Corporation FAN6862R/L • Rev. 1.0.0 (Continued) Figure 31. Transformer Diagram WIRE Ts 0.25*1 9 0.25 COPPER SHIELD 1.2 0. COPPER SHIELD 1.2 0. CORE ROUNDING TAPE Pin Specification 3－1 920µ ...
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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/. © 2009 Fairchild Semiconductor Corporation FAN6862R/L • Rev. 1.0.0 15 www.fairchildsemi.com ...
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... Fairchild Semiconductor Corporation FAN6862R/L • Rev. 1.0.0 16 www.fairchildsemi.com ...