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KA1M0680B Datasheet

  • KA1M0680B

  • Fairchild Power Switch(FPS)

  • 147.09KB

  • 12頁

  • FAIRCHILD

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www.fairchildsemi.com
KA1M0680B/KA1M0680RB/
KA1H0680B/KA1H0680RFB
Fairchild Power Switch(FPS)
Features
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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 R
CC
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
1
1
1.DRAIN 2.GND 3.V
CC
4.FB 5.Soft Start
Internal Block Diagram
#3 V
CC
32V
5V
Vref
Good
logic
#5 Soft Start
5V
OSC
S
R
#4 FB
5碌A
1mA 2.5R
1R
9V
+
7.5V
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+
25V
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Thermal S/D
OVER VOLTAGE S/D
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+
L.E.B
0.1V
S
R
Q
#2 GND
Q
Internal
bias
#1 DRAIN
SFET
Power on reset
Rev.1.0.2
漏2001 Fairchild Semiconductor Corporation

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