FAN6982MY Ver la hoja de datos (PDF) - Fairchild Semiconductor

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Fabricante

FAN6982MY

CCM Power Factor Correction Controller

Fairchild Semiconductor 

Pin Configuration

Figure 4. Pin Configuration

Pin Definitions

Pin #

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Name

IEA

IAC

ISENSE

VRMS

RDY

EN

RT/CT

SGND

PGND

OPFC

VDD

VREF

FBPFC

VEA

Description

Output of Current Amplifier. This is the output of the PFC current amplifier. The signal from

this pin is compared with sawtooth and determines the pulsewidth for PFC gate drive.

Input AC Current. For normal operation, this input is used to provide current reference for the

multiplier. The suggested maximum IAC is 100µA.

Current Sense. The non-inverting input of the PFC current amplifier and the output of

multiplier and PFC ILIMIT comparator.

Line-Voltage Detection. The pin is used for PFC multiplier.

Ready Signal. This pin controls the power-on sequence. Once the FAN6982 is turned on and

the FBPFC voltage exceeds in 2.4V, the RDY pin pulls LOW impedance. If the FBPFC voltage

is lower than 1.15V, the RDY pin pulls HIGH impedance.

Enable Range Function. The range function is enabled when EN is connected to VREF. The

range function is disabled when EN is connected to GND.

Oscillator RC Timing Connection. Oscillator timing node; timing set by RT and CT.

Signal Ground.

Power Ground.

Gate Drive. The totem-pole output drive for PFC MOSFET. This pin is internally clamped

under 15V to protect the MOSFET.

Power Supply. The threshold voltages for startup and turn-off are 11V and 9.3V, respectively.

The operating current is lower than 10mA.

Reference Voltage. Buffered output for the internal 7.5V reference.

Voltage Feedback Input. The feedback input for PFC voltage loop. The inverting input of PFC

error amplifier. This pin is connected to the PFC output through a divider network.

Output of Voltage Amplifier. The error-amplifier output for PFC voltage feedback loop. A

compensation network is connected between this pin and ground.

© 2009 Fairchild Semiconductor Corporation

FAN6982 • Rev. 1.0.1

4

www.fairchildsemi.com

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