FAN4800CU View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
Manufacturer
FAN4800CU Datasheet PDF : 19 Pages
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Application Diagrams
LBoost
DBoost
AC
CVIN
1MΩ 3MΩ
1MΩ 3MΩ
10Ω
10KΩ
Q1
CBulk
RFBPFC1
RSENSE
47nF
220nF
200KΩ
36KΩ
RFilter
CFilter
CIEA1
RIEA
CIEA2
RFBPWM
IAC OPFC
VRMS
FBPFC
ISENSE
IEA
VEA
CVEA1
RVEA
GND
CFBPFC
CVEA2
VREF
VDD
CVDD
VDD
RFBPFC2
RFBPFC3
10Ω
10KΩ
Q2 DF1
DF2
Lm
RT
FBPWM
CT
CSS
FBPWM
RT/CT
SS
RAMP
OPWM
ILIMIT
10Ω
Q3
RFilter
CFilter
10KΩ
RILIMIT
FBPWM
1nF
RRAMP
CRAMP
Figure 2. Current Mode
LBoost
DBoost
AC
CVin
1MΩ 3MΩ
1MΩ 3MΩ
10Ω
10KΩ
Q1
CBulk
RFBPFC1
RSENSE
47nF
220nF
200KΩ
36KΩ
RFilter
CFilter
CIEA1
RIEA
CIEA2
RFBPWM
IAC OPFC
VRMS
FBPFC
ISENSE
IEA
VEA
CVEA1
RVEA
GND
CFBPFC
CVEA2
VREF
VDD
CVDD
VDD
RFBPFC2
RFBPFC3
10Ω
10KΩ
Q2 DF1
DF2
Lm
RRAMP
RT
FBPWM
CRAMP
CT
CSS
FBPWM
RAMP
RT/CT
SS
OPWM
ILIMIT
10Ω
Q3
RFilter
CFilter
10KΩ
RILIMIT
FBPWM
1nF
Figure 3. Voltage Mode
12V
5V
12V
RD
RFB1
CFB RFB4
RFB2
5V
RFB3
12V
5V
12V
RD
RFB1
CFB RFB4
RFB2
5V
RFB3
© 2011 Fairchild Semiconductor Corporation
FAN4800AU/CU • Rev. 1.0.0
3
www.fairchildsemi.com
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