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BYC10600 Fiches technique(PDF) 6 Page - Fairchild Semiconductor

No de pièce BYC10600
Description  Power Factor Correction Converter Design
Download  15 Pages
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Fabricant  FAIRCHILD [Fairchild Semiconductor]
Site Internet  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

BYC10600 Fiches technique(HTML) 6 Page - Fairchild Semiconductor

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AN-6982
APPLICATION NOTE
© 2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.0 • 6/8/10
6
Design Considerations
In this section, a design procedure is presented using the
schematic in Figure 13 as reference. A 350W PFC power
supply application with universal input range is selected as a
design example. The design specifications are summarized in
Table 1.
Table 1. Design Specifications
Brownout Protection Line Voltage
72VAC
Line Voltage Range
85~264VAC
AC Input Voltage Frequency
fline = 50 ~ 60Hz
Nominal PFC output voltage
VBOUT = 387V
Minimum PFC Output Voltage During Holdup Time
310V
Hold-up Time
tHLD = 20ms
Rated Output Power
POUT = 350W
Efficiency
η = 0.94
Switching Frequency
fSW = 65KHz
PFC Inductor Ripple Current
Maximum ∆IL is 50% of Average Inductor Current at
Full Load
PFC Output Voltage Ripple
12VPP
IEA
RT/CT
RDY
EN
VRMS
ISENSE
IAC
SGND
OPFC
PGND
VDD
VREF
FBPFC
VEA
FAN6982
Range Enabled/Disabled
VEN =VVREF : Enabled
VEN = GND : Disabled
AC Input
F1
CIF2
LBOOST
DBOOST
CBOOST
Q1
RCS
RRMS1
RRMS2
RRMS3
CRMS1
CRMS2
RLF
CLF
RIAC
RIC
CIC1
CIC2
D1 D2
RDRV
RPL
CDD
RFB2 CFB
RFB1
RVC
CVC1
CVC2
RT
CT
CREF
REN
CRDY
vCC
VBOUT
Downstream
DC/DC Converter
PWM Controller
Q2
Rreg1
Rreg2
Rreg3
VOUT
From Standby Auxiliary Power Supply
CIF1
Figure 13. Reference Circuit for Design Example


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