The UCC28019 8-pin active Power Factor Correction (PFC) controller uses the boost topology operating in Continuous Conduction Mode (CCM)

UCC28019

Manufacturer Part NumberUCC28019
DescriptionThe UCC28019 8-pin active Power Factor Correction (PFC) controller uses the boost topology operating in Continuous Conduction Mode (CCM)
ManufacturerTexas Instruments
UCC28019 datasheet
 


Specifications of UCC28019

Uvlo Thresholds On/off(v)10.5/9.5Operating Supply(max)(v)22
Startup Current(ma)0.1Operating Supply Current(ma)7
Vref(v)5Vref Tol(%)2
Duty Cycle(max)(%)99.3Practical Operating Frequency(max)(mhz)0.65
Pin/package8PDIP, 8SOIC  
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The voltage error amplifier is compensated with a zero, f
Hz to reject high frequency noise and roll off the gain amplitude. The overall voltage loop crossover, f
to be at 10 Hz. The compensation components of the voltage error amplifier are selected accordingly.
1
f
=
ZERO
2
p
R
C
VCOMP
VCOMP
1
f
=
POLE
R
C
C
VCOMP
VCOMP
VCOMP _ P
2
p
C
+
C
VCOMP
VCOMP _ P
é
ê
ê
G ( f ) gmv
=
EA
ê
ê
C
C
(
+
VCOMP
VCOMP _ P
ê
ë
f
Hz
10
=
V
From
Figure
31, and the Design Calculator spreadsheet, the open loop gain of the voltage transfer function at 10
Hz is approximately 0.709 dB. Estimating that the parallel capacitor, C
capacitor, C
, the unity gain will be at f
VCOMP
is determined:
f
V
gmv
f
PWM _ PS
C
=
VCOMP
G
( f )
VLdB
f
10
´
2
p
20
V
Hz
10
42
m
S
´
.
Hz
1 589
C
=
=
VCOMP
0 709
.
dB
10
´ ´ ´
2
p
10
Hz
20
A 3.3- F capacitor is used for C
VCOMP
1
R
=
VCOMP
f
C
2
p
ZERO
VCOMP
1
R
=
VCOMP
2
´ ´
p
1 589
.
Hz
´
3 3
.
m
A 33-kΩ resistor is used for R
VCOMP
C
VCOMP
C
=
VCOMP _ P
2
p
f
R
C
POLE
VCOMP
VCOMP
.
F
3 3
m
C
=
VCOMP _ P
Hz
k
2
´ ´
p
20
´
33
W ´
A 0.22- F capacitor is used for C
VCOMP_P
Copyright © 2007, Texas Instruments Incorporated
, at the f
ZERO
1
s( f )R
C
+
VCOMP
VCOMP
R
C
é
æ
VCOMP
VCOMP
s( f )
1
s( f )
)
+
ê
ç
C
ç
+
ê
VCOMP
è
ë
, and the zero will be at f
V
.
F
3 88
m
.
. k
=
30 36
W
F
.
-
1
=
0 258
.
m
F
.
F
3 3
m
-
1
.
Product Folder Link(s):
UCC28019
UCC28019
SLUS755B – APRIL 2007 – REVISED DECEMBER 2007
pole and a pole, f
, placed at 20
PWM_PS
POLE
, is desired
V
ù
ú
ú
ú
C
ù
ö
VCOMP _ P
ú
ú
÷
C
ú
÷
VCOMP _ P
ú
ø
û
û
, is much smaller than the series
VCOMP_P
, the series compensation capacitor
PWM_PS
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