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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Verify that the product of the individual gain factors is approximately equal to the M
if not, reselect VCOMP and recalculate M
V
M
´
M
=
0 484 0 764
.
´
.
=
0 37
1
2
m
s
V
V
0 37
.
@
M M
=
0 372
.
1
2
s
s
m
m
The non-linear gain variable, M
, can now be calculated:
3
if :
0
<
VCOMP
<
3
2
then : M
.
VCOMP
=
0 0510
´
-
3
if :
3
£
VCOMP
<
7
2
then : M
=
0 1026
.
´
VCOMP
-
3
VCOMP
=
4
2
M
.
.
=
0 1026 4
´
-
0 3596 4 0 3085 0 512
´ +
3
The frequency of the current averaging pole, f
C
, for this is determined using the transconductance gain, gmi, of the internal current amplifier:
ICOMP
gmiM
1
C
=
ICOMP
K
2
p
f
1
IAVG
0 95
. mS
´
0 484
.
C
=
=
1100
ICOMP
7 2
´ ´ ´
p
9 5
. kHz
Copyright © 2007, Texas Instruments Incorporated
M
.
1
2
V
.
m
s
.
VCOMP
.
0 1543
´
-
0 1167
0 3596
.
´
VCOMP
+
0 3085
.
.
.
=
, is chosen to be at 9.5 kHz. The required capacitor on ICOMP,
IAVG
pF
Product Folder Link(s):
UCC28019
UCC28019
SLUS755B – APRIL 2007 – REVISED DECEMBER 2007
M
factor determined above,
1
2
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