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AN4149 Datasheet(PDF) 40 Page - STMicroelectronics

Part # AN4149
Description  Designing a CCM PFC pre-regulator based on the L4984D
PDF  43 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4149 Datasheet(HTML) 40 Page - STMicroelectronics

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Design example using the L4984D-CCM PFC excel spreadsheet
AN4149
40/43
DocID023523 Rev 2
The bill of material for Figure 25: CCM PFC schematic based on the L4984D is
automatically compiled by the excel spreadsheet. It summarizes all selected components
and some pertinent data.
Figure 26. Excel spreadsheet BOM
350
W FOT PFC BASED ON L4984D
BILL OF MATERIAL
Selected
Value
Unit
[ ]
BRIDGE RECTIFIER
D15XB60
MOSFET P/N
2 x STF21N65M5
DIODE P/N
STTH8S06
Inductor
L
700
μH
Max peak Inductor current
Ilpkx
7.91
A
Pin 4 – CS Sense resistor
Rsx
0.11
Ω
Power dissipation
Ps
1.53
W
INPUT Capacitor
Cin
1
μF
OUTPUT Capacitor
Cout
330
μF
Pin 3 - MULT Divider
Rmult L
100
k
Ω
Rmult H
12500
k
Ω
Pin 7 - TIMER capacitor
CT
680
pF
Switching frequency
fs
72.26
kHz
Pin 1 - Feedback Divider
RoutH
6600
k
Ω
RoutL
41.5
k
Ω
Pin 6 - Output divider for
PFC_OK
RH
9900
k
Ω
Pin 1,2 - Compensation
Network
22
nF
220
nF
RcompS
390
k
Ω
Voltage Feedforward
1000
nF
RFF
1000
k
Ω
IC Controller
L4984D
RL
56
k
Ω
CcompS
CcompP
CFF



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