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Fairchild - Fairchild Power Switch(FPS)

Numéro de référence KA1H0680B-TU
Description Fairchild Power Switch(FPS)
Fabricant Fairchild 
Logo Fairchild 





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KA1H0680B-TU fiche technique
KA1M0680B/KA1M0680RB/
KA1H0680B/KA1H0680RFB
Fairchild Power Switch(FPS)
www.fairchildsemi.com
Features
• Precision fixed operating frequency
• KA1M0680B,KA1M0680RB (67KHz)
• KA1H0680B,KA1H0680RFB (100KHz)
• Pulse by pulse over current limiting
• Over load protection
• Over voltage protection (Min. 23V)
• Internal thermal shutdown function
• Under voltage lockout
• Internal high voltage sense FET
• Latch up mode (KA1M0680B,KA1H0680B)
• Auto restart (KA1M0680RB,KA1H0680RFB)
• 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) consist of high
voltage power SenseFET and current mode PWM controller IC.
PWM controller features integrated fixed oscillator, under
voltage lock out, leading edge blanking, optimized gate turn-on/
turn-off driver, thermal shut down protection, over voltage
protection, temperature compensated precision current sources
for loop compensation and fault protection circuit. compared to
discrete MOSFET and controller or RCC switching converter
solution, a Fairchild Power Switch(FPS) can reduce total
component count, design size, weight and at the same time
increase & efficiency, productivity, and system reliability. It has
a basic platform well suited for cost effective design in either a
flyback converter or a forward converter.
TO-3P-5L
TO-3PF-5L
Internal Block Diagram
1
1
1.DRAIN 2.GND 3.VCC 4.FB 5.Soft Start
#3 VCC
#5 Soft Start
#4 FB
32V 5V Internal
Vref bias
Good
logic
5V
5µA
7.5V
25V
1mA 2.5R
9V 1R
+
OSC
+
S
Q
R
L.E.B
0.1V
+ Thermal S/D
OVER VOLTAGE S/D
S
Q
R
Power on reset
©2001 Fairchild Semiconductor Corporation
SFET
#1 DRAIN
#2 GND
Rev.1.0.2

PagesPages 12
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