Datasheet

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DESIGN EXAMPLE
350-W, Universal Input, 390-V
DC
Output, PFC Converter
Design Goals
UCC28019
SLUS755B – APRIL 2007 – REVISED DECEMBER 2007
This example illustrates the design process and component selection for a continuous conduction mode power
factor correction boost converter utilizing the UCC28019. The target design is a universal input, 350-W PFC
designed for an ATX supply application. This design process is directly tied to the UCC28019 Design Calculator
spreadsheet that can be found in the Tools section of the UCC28019 product folder on the Texas Instruments
website.
Table 1. Design Goal Parameters
PARAMETER TEST CONDITION MIN TYP MAX UNIT
Input characteristics
Input voltage V
IN
85 115 265 VAC
Input frequency f
LINE
47 63 Hz
V
AC(on)
75
I
OUT
= 0.9 A
Brown out voltage VAC
V
AC(off)
65
I
OUT
= 0.9 A
Output characteristics
V
OUT
85 VAC ≤ V
IN
≤ 265 VAC
Output voltage 370 390 410 VDC
47 Hz ≤ f
LINE
≤ 63 Hz
0 A ≤ I
OUT
≤ 0.9 A
85 VAC ≤ V
IN
≤ 65VAC
Line regulation 5%
I
OUT
= 0.440 A
V
IN
= 115 VAC, f
LINE
= 60 Hz
5%
0 A ≤ I
OUT
≤ 0.9 A
Load regulation
V
IN
= 230 VAC, f
LINE
= 50 Hz
5%
0 A ≤ I
OUT
≤ 0.9 A
V
RIPPLE(SW)
V
IN
= 115 VAC, f
LINE
= 60 Hz 3.9
I
OUT
= 0.9 A
High frequency output voltage
ripple
V
RIPPLE(SW)
V
IN
= 230 VAC , f
LINE
= 50 Hz 3.9
I
OUT
= 0.9 A
Vpp
V
RIPPLE(f_LINE)
V
IN
= 115 VAC, f
LINE
= 60 Hz, 19.5
I
OUT
= 0.9 A
Line frequency output voltage
ripple
V
RIPPLE(f_LINE)
V
IN
= 230 VAC, f
LINE
= 50 Hz 19.5
I
OUT
= 0.9 A
I
OUT
Output load current 85 VAC ≤ V
IN
≤ 265 VAC 0.9 A
47 Hz ≤ f
LINE
≤ 63 Hz
Output power P
OUT
350 W
Output over voltage protection V
OUT(OVP)
410
V
Output under voltage protection V
OUT(UVP)
370
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Product Folder Link(s): UCC28019