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FS7M0880 Datasheet

  • FS7M0880

  • Fairchild Power Switch(FPS)

  • 12頁(yè)

  • FAIRCHILD

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www.fairchildsemi.com
FS7M0880
Fairchild Power Switch(FPS)
Features
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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 R
CC
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
1
1. DRAIN 2. GND 3. V
CC
4. FB 5. S/S
Internal Block Diagram
#3 Vcc
UVLO
Voltage
Ref.
Good
Logic
#4
Feedback
Vcc
Vcc
1mA
OSC
2.5R
Vck
5uA
#4
Drain
S
Q
R
Voffset
LEB
Sense
#5
Soft Start
5V
R
Rsense
Reset
7.5V
Reset
SenseFET
S
Q
R
#2
Source
GND
Thermal
Protection
OVP
OCL
Control IC
Rev.1.0.1
漏2003 Fairchild Semiconductor Corporation

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