FAN4800I Fairchild Semiconductor, FAN4800I Datasheet - Page 15

• Manufacturer Part Number: FAN4800I
• Description: The FAN4800 is a controller for power-factor-corrected, switched-mode power supplies
• Manufacturer: Fairchild Semiconductor

FAN4800 Rev. 1.0.6
© 2005 Fairchild Semiconductor Corporation
REF
+
+
REF
VIN
DC
VIN
DC
OSC
OSC
U4
U4
EA
EA
L1
L1
I1
I1
U3
U3
RAMP
CLK
RAMP
CLK
SW1
SW1
SW2
SW2
VEAO
VEAO
Figure 11. Typical Leading-Edge Control Scheme
Figure 10. Typical Trailing-Edge Control Scheme
CMP
CMP
U1
U1
C1
C1
I2
I2
I4
I4
I3
I3
RL
R
RL
R
D
D
DFF
DFF
U2
U2
CLK
CLK
15
Q
Q
Q
Q
RAMP
RAMP
VEAO
VEAO
TIME
TIME
TIME
TIME
FAN4800 Rev.02
FAN4800 Rev.02
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