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FAN7930B Datasheet(PDF) 3 Page - Fairchild Semiconductor

Part # FAN7930B
Description  Critical Conduction Mode PFC Controller
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Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN7930B Datasheet(HTML) 3 Page - Fairchild Semiconductor

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© 2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN7930B • Rev. 1.0.2
3
Pin Configuration
INV
OVP
CS
ZCD
FAN7930B
8-SOP
COMP
VCC
OUT
GND
Figure 3.
Pin Configuration (Top View)
Pin Definitions
Pin #
Name Description
1
INV
This pin is the inverting input of the error amplifier. The output voltage of the boost PFC converter
should be resistively divided to 2.5V.
2
OVP
This pin is used to detect PFC output over voltage when INV pin information is not correct.
3
COMP
This pin is the output of the transconductance error amplifier. Components for the output voltage
compensation should be connected between this pin and GND.
4
CS
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.
5
ZCD
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.
6
GND
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.
7
OUT
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.
8
VCC
This is the IC supply pin. IC current and MOSFET drive current are supplied using this pin.


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