PFC ( Single Stage ) 36

CRM PFC Controller Evaluation Board FAN7529/FAN6961 -Single Stage PFC for Power-LEDs FAN7529/FAN6961 Reference Design • Reference #: FEBxxxx • CRM PFC Topology • Input : 90~264VAC / 47~ 63Hz • Output : 24V/2A Fairchild Single Stage PFC Solution Benefits • Over 90% Power Factor can be achieved by single power stage. • Simple circuit configuration & design flexibility with flyback topology. • Reduce board space & total BOM cost. 9 High efficiency about over 85% max. eff. 9 External circuitry for CC function needed 9 over 90% power factor under universal input. 9 CC performance follows external CC circuit performance 37

Power MOSFETs for Single Stage ( Flyback Type ) Power MOSFET for Single Stage ( Flyback Type ) RDS(ON) BVdss Product Qg Typ. ID PD Part Number Package Polarity Max (ohm) [ V ] Release [ nC ] [ A ] [ W ] @ VGS =10V FQPF8N80C TO-220F N 800 Released 1.55 35 8 59 FQPF7N80C TO-220F N 800 Released 1.9 27 6.6 56 FQPF6N80C TO-220F N 800 Released 2.5 21 5.5 51 FQPF3N80C TO-220F N 800 Released 4.8 13 3 39 FQP8N80C TO-220 N 800 Released 1.55 35 8 178 FQP7N80C TO-220 N 800 Released 1.9 27 6.6 167 FQP6N80C TO-220 N 800 Released 2.5 21 5.5 158 FQP3N80C TO-220 N 800 Released 4.8 13 3 107 FQA10N80C_F109 TO-3P N 800 Released 1.1 45 10 240 FQA8N80C_F109 TO-3P N 800 Released 1.55 35 8.4 220 FQA7N80C_F109 TO-3P N 800 Released 1.9 27 7 198 Universal Input Input + EMI (85 ~ 265 Vac) Filter LED Lighting & Load Rectifier Snubber (Up to 100W) Plan for 800V Super-Junction MOSFET for higher Power ZCD D VCC Feedback Controller & MOT Isolation FB S

Rectifiers for Single Stage ( Flyback Type ) VRRM IF (AV) VFM trr (max) Product 　Classification Part Number PKG [ V ] [ A ] [ V ] [ ns ] Release RURP860 600 TO220 8 1.5 70 Released FFPF10UP60S 600 TO220F 10 2.2 90 Released UltraFast RURP1560 600 TO220 15 1.5 60 Released RURP3060 600 TO220 30 1.5 60 Released HyperFast FFP/PF04H60S 600 TO220/F 4 2.1 35 Released I / II RHRD660/S 600 I/D PAK 6 2.1 30 Released FFP/PF08H60S 600 TO220/F 8 2.1 35 Released FFPF10H60S 600 TO220F 10 2.5 35 Released RHRP1560 600 TO220 15 2.1 40 Released RHRP3060 600 TO220 30 2.1 45 Released Universal Input Input + EMI (85 ~ 265 Vac) Filter LED Lighting & Load Rectifier Snubber (Up to 100W) ZCD D VCC Feedback Controller & MOT Isolation FB S

Concept of Single Stage PFC Conventional Solution 1st Stage: PFC 2nd Stage: DC-DC Converter Single Stage Solution ™ Isolation Flyback < 100W ™ Non-isolation Boost Buck-boost < 250W Cuk Sepic ™ Parallel Operation> 250W - Merits: Low-cost solution ( BOM reduction of 5 components ) - Demerits: Lower Power Factor, Higher rating components especially output capacitance.

Experimental Results ( 100W Single Stage PFC ) Universal Input Input + EMI LED Lighting (85 ~ 265 Vac) Filter Load & Snubber (Up to 100W) Rectifier Key Challenge Factor ZCD D VCC ¾ Main components MO Isolation - MOSFET: FCPF11N60 FB S 800V MOSFET needed - FRD: FFPF08H60S - Controller: (modified) FAN7530 ¾ Specification - Flyback-type Single stage PFC with CRM based constant voltage supply - 85V ~ 265 Vac input range - Output voltage: 48V, 2.08A, 100W - Application: LED Lighting

Efficiency Continued.. Î ±1% regulation of output voltage 90 88 86 84 Line voltage Output Voltage (V) (AC) 88 At Full load (100W) At Light load (5W) 85 48.2 48.8 86 115 48.1 48.5 145 48.0 48.3 84 175 48.0 48.3 205 48.0 48.3 82 235 48.0 48.3 265 48.0 48.3 80 90 120 150 180 210 240 270 Line Voltage (AC) Î ±1% regulation of output voltage Input voltage (AC) Output Efficiency (%) 85 83.6 115 85.6 145 86.7 175 86.5 205 86.6 235 86.6 265 86.3

Power Factor Continued.. 1.00 0.96 0.92 0.88 90 120 150 180 210 240 Input Voltage 0.96 0.92 Input Current 0.88 PF=0.997 90 120 150 180 210 240 270 Line Voltage (AC) Input voltage (AC) Power Factor 85 0.997 PF=0.948 115 0.994 145 0.988 175 0.979 205 0.966 235 0.948 265 0.924 PF=0.924

Waveforms Continued.. Switching waveforms at 110Vac, 100W Id (5 A/div) Vds (500 V/div) 2 ms/Div 2 ms/Div Vgs (20 V/div) Id (5 A/div) Vds (200 V/div) 4 us/Div 2 us/Div