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FAN7530 Datasheet(PDF) 3 Page - Fairchild Semiconductor

Part # FAN7530
Description  Critical Conduction Mode PFC Controller
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Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN7530 Datasheet(HTML) 3 Page - Fairchild Semiconductor

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© 2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN7530 Rev. 1.0.0
3
Pin Assignments
Figure 3. Pin Configuration (Top View)
Pin Definitions
Pin #
Name
Description
1INV
This pin is the inverting input of the error amplifier. The output voltage of the boost PFC
converter should resistively divided to 2.5V.
2MOT
This pin is used to set the slope of the internal ramp. The voltage of this pin is main-
tained at 2.9V. If a resistor is connected between this pin and GND, current flows out of
the pin and the slope of the internal ramp is proportional to this current.
3COMP
This pin is the output of the transconductance error amplifier. Components for the out-
put voltage compensation should be connected between this pin and GND.
4CS
This pin is the input of the over-current protection comparator. The MOSFET current is
sensed using a sensing resistor and the resulting voltage is applied to this pin. An
internal RC filter is included to filter switching noise.
5ZCD
This pin is the input of the zero current detection block. If the voltage of this pin goes
higher than 1.5V, then goes lower than 1.4V, the MOSFET is turned on.
6GND
This pin is used for the ground potential of all the pins. For proper operation, the signal
ground and the power ground should be separated.
7OUT
This pin is the gate drive output. The peak sourcing and sinking current levels are
+500mA and -800mA respectively. For proper operation, the stray inductance in the
gate driving path must be minimized.
8Vcc
This pin is the IC supply pin. IC current and MOSFET drive current are supplied using
this pin.
FAN7530
6
5
8
7
V
CC
OUT
GND
ZCD
1
2
3
4
COMP
CS
MOT
INV
YWW
FAN7530 Rev. 00


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