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KA1M0280 Datasheet

  • KA1M0280

  • Fairchild Power Switch(FPS)

  • 10頁

  • FAIRCHILD

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www.fairchildsemi.com
KA1M0280RB/KA1H0280RB
Fairchild Power Switch(FPS)
Features
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Precision Fixed Operating Frequency
KA1M0280RB (67kHz) , KA1H0280RB (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
Auto Restart
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-220F-4L
1
1. GND 2. DRAIN 3. V
CC
4. FB
Internal Block Diagram
#3 V
CC
32V
5V
Vref
Good
logic
OSC
9V
5碌A(chǔ)
#4 FB
1mA
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2.5R
1R
+
7.5V
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+
25V
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Thermal S/D
OVER VOLTAGE S/D
+
S
R
L.E.B
0.1V
S
R
Q
#1 GND
Q
Internal
bias
#2 DRAIN
SFET
Power on reset
Rev.1.0.2
漏2003 Fairchild Semiconductor Corporation

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