1. PFC ( Single Stage ) 36

2. 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

3. 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

4. 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

5. 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.

6. 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

7. 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

8. 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

9. 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