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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UCC28019
SLUS755B – APRIL 2007 – REVISED DECEMBER 2007
First, select R
based on the the highest reasonable resistance value available for typical applications.
VINS1
Then select R
based on this value:
VINS2
VINS
ENABLE _ th(max)
R
R
=
VINS
VINS
2
1
2
V
VINS
-
AC( on )
Where V
is the forward voltage drop across the ac rectifier bridge.
F_Bridge
Power dissipated in the resistor network is:
2
V
IN _ RMS
P
=
VINS
R
R
+
VINS
1
VINS
2
The filter capacitor, C
, has two functions. First, to attenuate the voltage ripple to levels between the enable
VINS
and brown-out thresholds which will prevent the ripple on VINS from falsely triggering IBOP when the converter
is operating at low line. Second, C
half-cycle periods while still having a good response to an actual brown-out event.
The capacitor is chosen so that it will discharge to the VINS
delay to accommodate line dropouts.
t
-
CVIN _ dschg
C
=
VINS
é
VINS
ê
BROWNOUT _ th(min)
R
n
l
ê
VINS
2
ê
0 9
. V
IN _ RMS (min)
ê
ë
Where:
N
half _ cycles
t
=
CVINS _ dschrg
2
f
LINE(min)
and V
is the lowest normal operating RMS input voltage.
IN_RMS(min)
16
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V
-
ENABLE _ th(max)
F _ BRIDGE
delays the brown-out protection operation for a desired number of line
VINS
BROWNOUT_th
ù
ú
ú
R
VINS
2
(
)
ú
R
R
ú
+
VINS
1
VINS
2
û
Product Folder Link(s):
UCC28019
www.ti.com
level after N number of half line cycles of
Copyright © 2007, Texas Instruments Incorporated