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FAN4800 View Datasheet(PDF) - Fairchild Semiconductor

Part Name
Description
View to exact match
FAN4800
Fairchild
Fairchild Semiconductor Fairchild
FAN4800 Datasheet PDF : 20 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
Pin Configuration
1 IEAO
2 IAC
3 ISENSE
4 VRMS
5 SS
VEAO 16
VFB 15
VREF 14
VCC 13
PFC OUT 12
6 VDC
7 RAMP1
PWM OUT 11
GND 10
8 RAMP2
DC ILIMIT 9
FAN4800 Rev.03
Figure 2. Pin Configuration (Top View)
Pin Definitions
Pin #
Name
1
IEAO
2
IAC
3
ISENSE
4
VRMS
5
SS
6
VDC
7
RAMP1
(RtCt)
8
RAMP2
(PWM RAMP)
9
DC ILIMIT
10
GND
11
PWM OUT
12
PFC OUT
13
VCC
14
VREF
15
VFB
16
VEAO
Description
PFC transconductance current error amplifier output
PFC gain control reference input
Current sense input to the PFC current limit comparator
Input for PFC RMS line voltage compensation
Connection point for the PWM soft-start capacitor
PWM voltage feedback input
Oscillator timing node; timing set by RT, CT
In current mode, this pin functions as the current sense input; in voltage mode,
it is the PWM input from the PFC output (feed forward ramp)
PWM current limit comparator input
Ground
PWM driver output
PFC driver output
Positive supply
Buffered output for the internal 7.5V reference
PFC transconductance voltage error amplifier input
PFC transconductance voltage error amplifier output
© 2005 Fairchild Semiconductor Corporation
FAN4800 Rev. 1.0.5
3
www.fairchildsemi.com
 

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