AN-8027 — FAN480X PFC+PWM Combination Controller Application
AN-8027 — FAN480X PFC+PWM Combination Controller Application
AN-8027 — FAN480X PFC+PWM Combination Controller Application
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<strong>AN</strong>-<strong>8027</strong><br />
Design Summary<br />
<strong>Application</strong> Output Power Input Voltage Output Voltage / Output Current<br />
ATX Power 300 W 85~264 VAC 12 V / 16.5 A; 5 V / 9 A; -12 V / 0.8 A; 3.3 V / 13.5 A<br />
Features<br />
Meets 80+ specification<br />
F<strong>AN</strong>480X is fully pin-to-pin compatible with ML4800 and F<strong>AN</strong>4800 (needs a few parts modified)<br />
Switch-charge technique of gain modulator can provide better PF and lower THD<br />
Leading and trailing modulation technique for reduce output ripple<br />
Protections: OVP (Over-Voltage Protection), UVP (Under-Voltage Protection), OLP (Open-Loop Protection), and<br />
maximum current limit<br />
AC<br />
Input<br />
F1<br />
C IF1<br />
53nF<br />
C RMS1<br />
200n<br />
F<br />
C RMS2<br />
2M<br />
R RMS1<br />
200 K<br />
36 k<br />
R RMS3<br />
R RMS2<br />
R LF1<br />
C LF1 C SS<br />
0.47nF<br />
C B<br />
R T<br />
6.9 k<br />
C T<br />
1nF<br />
R IAC<br />
6 M<br />
R B<br />
5<br />
7.5k<br />
L BOOST<br />
FDA18N50<br />
R CS1<br />
D1 D2<br />
1nF<br />
R RAMP<br />
IEA<br />
IAC<br />
ISENSE<br />
VRMS<br />
SS<br />
C RAMP<br />
0.1<br />
R IC<br />
FBPWM<br />
RT/CT<br />
RAMP<br />
22k<br />
0.13nF CIC2 D BOOST<br />
BYC10600<br />
CBOOST Q1<br />
270uF<br />
17k 4nF<br />
VEA<br />
FBPFC<br />
F<strong>AN</strong>480X<br />
C IC1<br />
VREF<br />
VD<br />
D<br />
OPFC<br />
OPWM<br />
GND<br />
ILIMIT<br />
10<br />
C LF2<br />
V BOUT<br />
R FB1<br />
2M<br />
100 nF<br />
C DD<br />
10 k<br />
10 k<br />
V D<br />
D<br />
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com<br />
Rev. 1.0.2 • 6/21/13 14<br />
C REF<br />
C FB<br />
FCP11N60<br />
R LF2<br />
R VC<br />
C VC1<br />
12.9k<br />
RFB2 Q2<br />
FCP11N60<br />
362k<br />
20nF<br />
FR157<br />
Q3<br />
DR2 R CS2<br />
3.7nF<br />
C VC2<br />
DR1 FR157<br />
Figure 25. Final Schematic of Design Example<br />
FYPF2006DN<br />
D R1<br />
D R2<br />
1.2 k<br />
C F<br />
100<br />
nF<br />
R D<br />
L 4<br />
1<br />
D F1<br />
L 1<br />
1<br />
L 2<br />
1<br />
DF2 STPS60L45CW<br />
SF34DG<br />
R F<br />
4.64 k<br />
L 3<br />
1<br />
C O31<br />
FR157<br />
32.4 k<br />
ROS1 11 k<br />
R OS3<br />
R OS2<br />
L 1<br />
1.8uH<br />
2<br />
C O11<br />
L22<br />
V o1<br />
V o2<br />
V o1<br />
CO12 1000uF<br />
V o2<br />
CO21 CO22 2200uF 1000uF<br />
L 4<br />
2<br />
DF2 FR157<br />
2200uF<br />
12V<br />
5V<br />
V o3<br />
220uF<br />
300<br />
2uH<br />
-12V<br />
L43<br />
C O21<br />
C O22<br />
10<br />
12V<br />
5V<br />
1 k<br />
1uF 10 k<br />
3.4 k<br />
3.3V<br />
5.45 k<br />
V o4
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