PFC ( Single Stage )
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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.
High efficiency about over 85% max. eff. External circuitry for CC function needed
over 90% power factor under universal input. 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
LED Lighting (85 ~ 265 Vac) Filter
Load &
(Up to 100W) Rectifier Snubber
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
LED Lighting (85 ~ 265 Vac) Filter
Load &
(Up to 100W) Rectifier Snubber
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 &
(Up to 100W) Rectifier Snubber
Key Challenge Factor ZCD D
VCC
MO Isolation Main components
FB S - MOSFET: FCPF11N60
800V MOSFET needed - FRD: FFPF08H60S
- Controller: (modified) FAN7530
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..
90 Output Voltage (V) Line voltage
(AC) At Full load (100W) At Light load (5W) 88 85 48.2 48.8
115 48.1 48.5 86 145 48.0 48.3
175 48.0 48.3 84
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) ±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
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