FSFR1800USL 查看數據表（PDF） - Fairchild Semiconductor

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FSFR1800USL

Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converters

Fairchild Semiconductor 

Pin Configuration

Figure 3. Package Diagram

Pin Definitions

Pin #

1

Name

VDL

2

AR

3

RT

4

CS

5

SG

6

PG

7

LVCC

8

NC

9

HVCC

10

VCTR

Description

This is the drain of the high-side MOSFET, typically connected to the input DC link voltage.

This pin is for discharging the external soft-start capacitor when any protections are

triggered. When the voltage of this pin drops to 0.2, all protections are reset and the

controller starts to operate again.

This pin programs the switching frequency. Typically, an opto-coupler is connected to control

the switching frequency for the output voltage regulation.

This pin senses the current flowing through the low-side MOSFET. Typically, negative

voltage is applied on this pin.

This pin is the control ground.

This pin is the power ground. This pin is connected to the source of the low-side MOSFET.

This pin is the supply voltage of the control IC.

No connection.

This is the supply voltage of the high-side gate-drive circuit IC.

This is the drain of the low-side MOSFET. Typically, a transformer is connected to this pin.

© 2009 Fairchild Semiconductor Corporation

FSFR-US Series • Rev.1.0.2

3

www.fairchildsemi.com

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