Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

Preview PDF HTML

AN2782 Datasheet(PDF) 11 Page - STMicroelectronics

Part # AN2782
Description  Solution for designing a 400 W fixed-off-time controlled
PDF  39 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2782 Datasheet(HTML) 11 Page - STMicroelectronics

Back Button AN2782 Datasheet HTML 7Page - STMicroelectronics AN2782 Datasheet HTML 8Page - STMicroelectronics AN2782 Datasheet HTML 9Page - STMicroelectronics AN2782 Datasheet HTML 10Page - STMicroelectronics AN2782 Datasheet HTML 11Page - STMicroelectronics AN2782 Datasheet HTML 12Page - STMicroelectronics AN2782 Datasheet HTML 13Page - STMicroelectronics AN2782 Datasheet HTML 14Page - STMicroelectronics AN2782 Datasheet HTML 15Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 39 page
background image
AN2782
Designing a fixed off-time PFC
Doc ID 14763 Rev 2
11/39
4.2
Operating condition
The first step is to define the main parameters of the circuit, using the specification points
given in Section 4.1:
Referring to the main currents shown in Figure 1, the following formula expresses the
maximum value of current circulating in the boost cell which means at minimum line voltage
of the selected range:
It is important to define the following ratios in order to continue describing the energetic
relationships in the PFC:
From (24), (25):
●
Rated DC output current
(21)
●
Maximum input power
(22)
●
RMS input current
(23)
(24)
(25)
●
Line peak current:
(26)
●
Inductor ripple-
ΔILpk:
(27)
out
out
out
V
P
I
=
A
00
.
1
V
400
W
400
I
out
=
=
W
44
.
444
100
90
W
400
Pin
=
⋅
=
η
= out
in
P
P
PF
VAC
P
I
min
out
in
⋅
=
A
99
.
4
99
.
0
Vac
90
W
400
I
in
=
⋅
=
out
min
min
V
VAC
2
k
=
32
.
0
V
400
Vac
90
2
k
min
=
=
out
max
max
V
VAC
2
k
=
94
.
0
V
400
Vac
265
2
k
max
=
=
out
min
in
max
PK
V
k
P
2
I
⋅
⋅
=
A
98
.
6
V
400
318
.
0
)
W
44
.
444
(
2
I
max
PK
=
⋅
⋅
=
max
PK
r
r
pk
I
k
3
8
k
6
IL
⋅
⋅
−
⋅
=
Δ
A
18
.
2
A
98
.
6
34
.
0
3
8
34
.
0
6
IL
pk
=
⋅
⋅
−
⋅
=
Δ



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39


Datasheet Download

Go To PDF Page


Link URL



Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link to Datasheet    |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com