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PDF 2S0765 Data sheet ( Hoja de datos )

Número de pieza 2S0765
Descripción KA2S0765
Fabricantes Fairchild Semiconductor 
Logotipo Fairchild Semiconductor Logotipo



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KA2S0765
Fairchild Power Switch(FPS)
www.fairchildsemi.com
Features
• Wide operatimg frequency range up to (150kHz)
• Pulse by pulse over current limiting
• Over load protection
• Over voltage protecton (Min. 23V)
• Internal thermal shutdown function
• Under voltage lockout
• Internal high voltage sense FET
• External sync terminal
• Latch up Mode
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. control IC features a trimmed 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 Monitor power supply.
TO-3P-5L
1
1.DRAIN 2. GND 3. Vcc 4. FB 5. Sync
Internal Block Diagram
#3 VCC
#5 Sync
#4 FB
32V
5V +
6.4V
2µA 1mA 2.5R
9V 1R
+
5V Internal
Vref bias
Good
logic
OSC
+
S
Q
R
L.E.B
0.1V
7.5V
+
Thermal S/D
S
Q
R
25V
OVER VOLTAGE S/D
Power on reset
©2001 Fairchild Semiconductor Corporation
SFET
#1 DRAIN
#2 GND
Rev.1.0.2

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2S0765 pdf
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Typical Performance Characteristics
(These characteristic graphs are normalized at Ta = 25°C)
KA2S0765
Fig.1 Operating Frequency
1.2
1.15
1.1
1.05
Fosc 1
0.95
0.9
0.85
0.8
-25 0 25 50 75 100 125 150
Temperature [°C]
Figure 1. Operating Frequency
1.2
1.15
1.1
1.05
Iop 1
0.95
0.9
0.85
0.8
-25
Fig.3 Operating Current
0 25 50 75 100 125 150
Temperature [°C]
Figure 3. Operating Supply Current
1.5
1.3
1.1
Is tart
0.9
0.7
0.5
-25
Fig.5 Start up Current
0 25 50 75 100 125 150
Temperature [°C]
Figure 5. Start up Current
Fig.2 Feedback Source Current
1.2
1.15
1.1
1.05
Ifb 1
0.95
0.9
0.85
0.8
-25 0 25 50 75 100 125
Temperature [°C]
150
Figure 2. Feedback Source Current
1.1
1.05
IIopveear k 1
0.95
0.9
0.85
0.8
-25
Fig.4 Max Inductor Current
0 25 50 75 100 125 150
Temperature [°C]
Figure 4. Peak Current Limit
Fig.6 Start Threshold Voltage
1.15
1.1
1.05
Vstart 1
0.95
0.9
0.85
-25 0
25 50 75 100 125 150
Temperature [°C]
Figure 6. Start Threshold Voltage
5

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