FL7930CMX 查看數據表（PDF） - Fairchild Semiconductor

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FL7930CMX

Single-Stage Flyback and Boundary-Mode PFC Controller for Lighting

Fairchild Semiconductor 

Pin Configuration

Figure 6. Pin Configurations (Top View)

Pin Definitions

Pin #

1

2

3

4

5

6

7

8

Name

INV

OVP

RDY

COMP

CS

ZCD

GND

OUT

VCC

Description

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.

FL7930B: This pin is used to detect PFC output over-voltage when INV pin information is not

correct.

FL7930C: This pin is used to detect PFC output-voltage reaching a pre-determined value.

When output voltage reaches 89% of rated output voltage, this pin is pulled HIGH, which is an

(open-drain) output type.

This pin is the output of the transconductance error amplifier. Components for the output

voltage compensation should be connected between this pin and GND.

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.

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.

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.

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.

This is the IC supply pin. IC current and MOSFET drive current are supplied using this pin.

© 2011 Fairchild Semiconductor Corporation

FL7930 • Rev. 1.0.0

4

www.fairchildsemi.com

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