7M0680 データシートの表示（PDF） - Fairchild Semiconductor

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7M0680

Fairchild Power Switch

Fairchild Semiconductor 

FS7M0880

Fairchild Power Switch(FPS)

www.fairchildsemi.com

Features

• Precision Fixed Operating Frequency

• FS7M0880(66kHz)

• Pulse By Pulse Over Current Limiting

• Over Load Protection

• Over Voltage Protection (Min. 25V)

• Internal Thermal Shutdown Function

• Under Voltage Lockout

• Internal High Voltage Sense FET

• Latch Up Mode

• Soft Start

Description

The Fairchild Power Switch(FPS) product family is specially

designed for an off line SMPS with minimal external

components. The Fairchild Power Switch(FPS) consists of a

high voltage power SenseFET and the current mode PWM con-

troller IC. The PWM controller includes an integrated fixed

oscillator, the under voltage lock out, the leading edge blanking

block, the optimized gate turn-on/turn-off driver, the thermal

shut down protection, the over voltage protection, the tempera-

ture compensated precision current sources for loop compensa-

tion and an fault protection circuit. Compared to just PWM

controller combined MosFET or RCC switching converter solu-

tion, a Fairchild Power Switch(FPS) can reduce total compo-

nent price, design size, and weight,also simultaneously increase

efficiency, productivity, and system reliability. It has a simple

method of application well suited for cost down design in either

a flyback converter or a forward converter.

TO-3P-5L

Internal Block Diagram

1

1. DRAIN 2. GND 3. VCC 4. FB 5. S/S

#3 Vcc

#4

Feedback

#5

Soft Start

Vcc Vcc

5uA 1mA

Vck

OSC

UVLO

Good

Logic

Voltage

Ref.

#4

Drain

2.5R

S

Q

R

R

Voffset

LEB

5V

Rsense

Reset

Reset

7.5V

Thermal

Protection

OVP

OCL

Sense

#2

Source

SenseFET GND

S

Q

R

Control IC

©2003 Fairchild Semiconductor Corporation

Rev.1.0.1

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