Datasheet
DESIGN EXAMPLE
350-W, Universal Input, 390-V
DC
Output, PFC Converter
UCC28019A
www.ti.com
.................................................................................................................................................. SLUS828B – DECEMBER 2008 – REVISED APRIL 2009
This example illustrates the design process and component selection for a continuous conduction mode power
factor correction boost converter utilizing the UCC28019A. The target design is a universal input, 350-W PFC
designed for an ATX supply application. This design process is directly tied to the UCC28019A Design Calculator
(TI Literature Number SLUC117) spreadsheet that can be found in the Tools section of the UCC28019A product
folder on the Texas Instruments website.
Table 1. Design Goal Parameters
PARAMETER TEST CONDITION MIN TYP MAX UNIT
Input characteristics
V
IN
Input voltage 85 115 265 VAC
f
LINE
Input frequency 47 63 Hz
V
AC(on),
I
OUT
= 0.9 A 75
Brown out voltage VAC
V
AC(off),
I
OUT
= 0.9 A 65
Output characteristics
85 VAC ≤ V
IN
≤ 265 VAC, 47 Hz ≤ f
LINE
≤ 63
V
OUT
Output voltage Hz 380 390 402 VDC
0 A ≤ I
OUT
≤ 0.9 A
V
IN
= 115 VAC, f
LINE
= 60 Hz, I
OUT
= 0.9 A 3.9
V
RIPPL
High frequency output voltage
E(SW)
ripple
V
IN
= 230 VAC , f
LINE
= 50 Hz, I
OUT
= 0.9 A 3.9
Vpp
V
RIPPL
V
IN
= 115 VAC, f
LINE
= 60 Hz, I
OUT
= 0.9 A 19.5
Line frequency output voltage
E(f_LIN
ripple
V
IN
= 230 VAC, f
LINE
= 50 Hz, I
OUT
= 0.9 A 19.5
E)
85 VAC ≤ V
IN
≤ 265 VAC, 47 Hz ≤ f
LINE
≤ 63
I
OUT
Output load current 0.9 A
Hz
P
OUT
Output power 350 W
V
OUT(
Output over voltage protection 410
OVP)
V
V
OUT(
Output under voltage protection 370
UVP)
Control loop characteristics
f
SW
Switching frequency T
J
= 25 ° C 61.7 65 68.3 kHz
f
(CO)
Control loop bandwidth V
IN
= 162 VDC, I
OUT
= 0.45 A 14 Hz
Phase margin V
IN
= 162 VDC, I
OUT
= 0.45 A 70 degrees
PF Power factor V
IN
= 115 VAC, I
OUT
= 0.9 A 0.98
V
IN
= 115 VAC, f
LINE
= 60 Hz, I
OUT
= 0.9 A 4.3% 10%
THD Total harmonic distortion
V
IN
= 230 VAC, f
LINE
= 50 Hz, I
OUT
= 0.9 A 6.6% 10%
η Full load efficiency V
IN
= 115 VAC, f
LINE
= 60 Hz, I
OUT
= 0.9 A 0.95
T
AMB
Ambient temperature 50 ° C
Copyright © 2008 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 23
Product Folder Link(s): UCC28019A