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PDF KA1M0680 Data sheet ( Hoja de datos )

Número de pieza KA1M0680
Descripción SMART POWER SWITCH
Fabricantes Fairchild Semiconductor 
Logotipo Fairchild Semiconductor Logotipo



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No Preview Available ! KA1M0680 Hoja de datos, Descripción, Manual

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SPS
KA1M0680
SPS
The SPS product family is specially designed for an off-line
SMPS with minimal external components. The SPS consist of
high voltage power SenseFET and current mode PWM IC.
Included 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, and temperature compensated precision
current sources for loop compensation and fault protection
circuitry. Compared to discrete MOSFET and controller or
RCC switching converter solution, a SPS 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
1.DRAIN 2. GND 3. VCC 4. FB 5. S/S
FEATURES
• Precision fixed operating frequency (70kHz)
• Pulse by pulse over current limiting
• Over Current Protection
• Over Voltage Protection (Min. 23V)
• Internal thermal shutdown function
• Under voltage lockout
• Internal high voltage sense FET
• Latch up mode
• Soft start
ORDERING INFORMATION
Device
KA1M0680
Package
TO-3P-5L
Operating Temperature
25°C to +85°C
BLOCK DIAGRAM
#3 VCC
#5 Soft Start
#4 FB
32V 5V Internal
Vref bias
Good
logic
5V
5µA
7.5V
25V
OSC
S
Q
R
1mA 2.5R
9V 1R
+
L.E.B
0.1V
+
+ Thermal S/D
OVER VOLTAGE S/D
S
Q
R
Power on reset
© 1999 Fairchild Semiconductor Corporation
SFET
#1 DRAIN
#2 GND
Rev. B
1

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KA1M0680 pdf
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SPS
TYPICAL PERFORMANCE CHARACTERISTICS
(These characteristic graphs are normalized at Ta=25°C)
KA1M0680
Figure 1. Operating Frequency
Figure 2. Feedback Source Current
Figure 3. Operating Current
Figure 4. Max. Inductor Current
Figure 5. Start up Current
Figure 6. Start Threshold Voltage
5

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