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AN2782 Datasheet(PDF) 29 Page - STMicroelectronics

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

AN2782 Datasheet(HTML) 29 Page - STMicroelectronics

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AN2782
Design example using the L6562A FOT PFC Excel spreadsheet
Doc ID 14763 Rev 2
29/39
Figure 20.
Excel spreadsheet FOT PFC schematic
The bill of material in Figure 21 is automatically compiled by the Excel spreadsheet. It
summarizes all selected components and some salient data.
Figure 21.
Excel spreadsheet BOM
The following section is dedicated to report the main bench evaluation results of the 400 W
FOT PFC with the L6562A available for the customer as an demonstration board.
Cin
2
3
8
6
1
7
Cout
MULT
COMP
INV
GD
CS
GND
L6562A
ZCD
1
2
L
0
D
RoutH
RoutL
Rsense
Vac (88V - 264V)
Rzcd2
Czcd2
5
Rzcd3
CcompS
4
RcompS
MOS
CcompP
VCC
+
T
-
VCC
400
W FOT PFC BASED ON L6562A
BILL OF MATERIAL
Selected
Value
Unit [ ]
BRIDGE RECTIFIER
D15XB60
MOSFET P/N
2 x STP12NM50FP
DIODE P/N
STTH8R06
Inductor
Lx
500
H
Max peak Inductor current
Ilpkx
9.67
A
Sense resistor
Rsx
0.12
Power dissipation
Ps
2.14
W
INPUT Capacitor
Cin
1
F
OUTPUT Capacitor
Cout
330
F
MULT Divider
Rmult L
10
k
Rmult H
1240
k
ZCD set
Rzcd1
30
k
Rzcd2
1.8
k
Rzcd3
3
k
Czcd1
120
pF
Czcd2
68
pF
Diode P/N
1N4148
pnp-BJT P/N
BC857C
Feedback Divider
RoutH
1530
k
RoutL
9.5
k
Comp Network
CcompP
220
nF
CcompS
2200
nF
RcompS
47
k
IC Controller
L6562A



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