FS7M0680 Datasheet, PDF (1/16 Pages) Fairchild Semiconductor – Fairchild Power Switch(FPS)

FS7M0680
Fairchild Power Switch(FPS)
www.fairchildsemi.com
Features
• Precise Fixed Operating Frequency
• FS7M0680(66kHz)
• Pulse By Pulse Current Limiting
• Over Current Protection
• Over Load Protection
• Over Voltage Protection (Min. 25V)
• Internal Thermal Shutdown Function
• Under Voltage Lockout with Hysteresis
• 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 compo-
nents. The Fairchild Power Switch (FPS) consists of high volt-
age power SenseFET and current mode PWM controller. The
PWM controller includes integrated fixed oscillator, under volt-
age lock out, leading edge blanking block, optimized gate turn-
on/turn-off driver, thermal shut down protection, over voltage
protection, temperature compensated precise current sources for
loop compensation and fault protection circuit. Compared to
discrete MOSFET and PWM controller or ring choke converter
(RCC) solutions, the Fairchild Power Switch (FPS) can reduce
total cost, component count, size and weight simultaneously
increasing efficiency, productivity, and system reliability. It has
simple applications well suited for cost down design for flyback
converter or forward converter.
TO-3P-5L
1
1. DRAIN 2. GND 3. VCC 4. FB 5. S/S
Internal Block Diagram
#4
Feedback
Vsd
Vcc
Vovp
#5
Soft Start
OSC
Internal
Vias
#3
Vcc
Vref
UVLO
+
-
3R
Ifb
R
Vref Vref
Idelay
PWM
C om p arator
-
+
SQ
R
Vfb
offset
Vcc
Reset
SQ
R
Delay
120ns
Ron
Roff
+
-
Vocp _Rsense
Thermal
Shutdown
#1
DRAIN
#2
Source
GND
©2003 Fairchild Semiconductor Corporation
Rev.1.0.0