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| Input data |
Vinm= |
176 |
Vrms |
Minimum AC Input Voltage |
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Vinn= |
230 |
Vrms |
Nominal AC Input Voltage |
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Vinx= |
276 |
Vrms |
Maximum AC Input Voltage |
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fpfc= |
140 |
kHz |
PFC switching frequency |
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fline= |
50 |
Hz |
Line Frequency |
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Ppfc= |
2,689 |
W |
Maximum Output Power, PFC Stage |
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Cb= |
1,269 |
uF |
Boost Capacitor, chosen |
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Vba= |
407 |
V |
Average boost voltage |
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Vbpp= |
16.6 |
Vpp |
Boost Voltage ripple, peak to peak |
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Lb= |
83.0 |
uH |
PFC boost inductor |
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Iinx= |
16.0 |
Arms |
Maximum rms Input Current @ low line |
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Iinn= |
12.2 |
Arms |
Nominal rms Input Current @ nominal
line |
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Ibpkx= |
26.8 |
Apk |
Boost Ind., Switch and Diode max pk
current |
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Vspfc= |
270 |
mV |
Peak voltage, PFC shunt, nominal
conditions |
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Iacpkx= |
300 |
uA |
Maximum peak Iac @ Maximum line |
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Vs= |
5.4 |
Vpp |
Slope voltage, peak to peak |
5.4 |
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Vvea= |
3.5 |
Vpp |
Vvea=1.5V to 5V. At 5V full power. |
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V3thd= |
4.0 |
% |
Third harmonic contribution to THD |
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V3vff= |
1.6 |
% |
Third harmonic contribution to THD
due to Vff |
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V3vao= |
2.4 |
% |
Third harmonic contribution to THD
due to Vvao |
Vvao rip=2x1.5% |
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Rvi= |
962 |
k |
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Rff1= |
960 |
k |
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Rff2= |
100 |
k |
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Rff3= |
20 |
k |
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Rpk1= |
10 |
k |
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Ilim= |
30 |
% |
Percentage above nominal |
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Plim= |
20 |
% |
Input power percentage above nominal |
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| Output data |
Rspfcc= |
15.6 |
mOhm |
PFC shunt resistor |
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Rspfc= |
15.0 |
mOhm |
PFC shunt resistor, chosen |
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Pspfc= |
2.2 |
W |
PFC shunt, nominal power |
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Pspfc= |
3.8 |
W |
PFC shunt, maximum power |
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Rvacc= |
1,301 |
k |
Multiplier Iac set resistor |
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Rvac= |
1,298 |
k |
Multiplier Iac set resistor, chosen |
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Iacl= |
192 |
uA |
Iac at low line |
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Iml= |
384 |
uA |
Multiplier current limit at low line.
Should be > |
78 |
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Impk= |
78 |
uA |
Multiplier current at peak low line |
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Vffm= |
2.93 |
V |
Multiplier Vrms input at low line |
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Vffn= |
3.83 |
V |
Multiplier Vrms input at nominal line |
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Vffx= |
4.60 |
V |
Multiplier Vrms input at high line |
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Gff= |
0.024 |
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fp= |
16 |
Hz |
Vff double pole frequency |
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Cff1= |
102 |
nF |
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Cff2= |
512 |
nF |
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Vspfcx= |
339 |
mV |
Peak voltage, PFC shunt, low line |
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Rmoc= |
3.63 |
k |
Resistor, multiplier output |
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Rmo= |
3.74 |
k |
Resistor, multiplier output, chosen |
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dVs/dt |
0.756 |
V/us |
Timing capacitor voltage slope |
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dVspfc/dt= |
0.074 |
V/us |
Shunt voltage downslope |
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Gca= |
10.28 |
|
Gain, current amplifier |
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Rci=Rmo= |
3.74 |
k |
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Rcz= |
38.4 |
k |
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fci= |
22.3 |
kHz |
Current loop crossover frequency,
should be = |
22.3 |
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Cczp= |
588 |
pF |
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Ccz= |
560 |
pF |
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Ccpc= |
59 |
pF |
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Ccp= |
56 |
pF |
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Gva= |
0.0203 |
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Cvf= |
81.6 |
nF |
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fvi= |
21.9 |
Hz |
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Rvf= |
89.0 |
k |
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Rpk2= |
0.697 |
k |
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Rvd= |
6.84 |
k |
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| The reference designators are those used by Unitrode in its
application notes. |
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| SMPS Power Supplies, Inc. |
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| Doing The Right Thing Is The Right Thing To Doä |
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| www.PowerSupplies.net |
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| www.GoToPower.net |
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| Copyright © 1998-2005 SMPS Power Supplies,
Inc. All rights reserved. |
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| Copyright © 1990-1997 LCD Consulting |
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| Copyright © 1979-1989 Constantin Darius Livescu |
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