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PDF KA5L0565R Data sheet ( Hoja de datos )

Número de pieza KA5L0565R
Descripción Power Switch
Fabricantes Fairchild 
Logotipo Fairchild Logotipo



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KA5L0565R
Fairchild Power Switch(FPSTM)
www.fairchildsemi.com
Features
• Precision Fixed Operating Frequency (50kHz)
• Low Start-up Current(Typ. 100uA)
• Pulse by Pulse Current Limiting
• Over Current Protection
• Over Voltage Protection (Min. 25V)
• Internal Thermal Shutdown Function
• Under Voltage Lockout
• Internal High Voltage Sense FET
• Auto-Restart 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) consists of a
high voltage power SenseFET and a current mode PWM IC.
Included PWM controller integrates the fixed frequency
oscillator, the under voltage lock-out, the leading edge
blanking, the optimized gate turn-on/turn-off driver, the
thermal shutdown protection, the over voltage protection,
and the temperature compensated precision current sources
for the loop compensation and the fault protection circuitry.
Compared to a discrete MOSFET and a PWM controller or
an RCCsolution, a Fairchild Power Switch(FPS) can reduce
the total component count, design size and weight and at the
same time increase efficiency, productivity, and system
reliability. It has a basic platform well suited for the cost
effective design in a flyback converter.
TO-220F-4L
Internal Block Diagram
1
1. GND 2. DRAIN 3. VCC 4. FB
#3 VCC
#4 FB
32V 5V Internal
Vref bias
Good
logic
5µA
7.5V
27V
OSC
9V
1mA
S
Q
R
2.5R
1R
+
L.E.B
0.1V
+
+ Thermal S/D
S
RQ
OVER VOLTAGE S/D
Power on reset
SFET
©2004 Fairchild Semiconductor Corporation
#2 DRAIN
#1 GND
Rev.1.0.0

1 page




KA5L0565R pdf
Typical Performance Characteristics
(These characteristic graphs are normalized at Ta=25°C)
KA5L0565R
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
Figure 1. Operating Frequency
1.2
1.15
1.1
1.05
Iop 1
0.95
0.9
0.85
0.8
-25 0 25 50 75 100 125 150
Figure 3. Operating Supply Current
1.5
1.3
1.1
Istart
0.9
0.7
0.5
-25 0 25 50 75 100 125 150
Figure 5. Start up Current
1.2
1.15
1.1
1.05
Ifb 1
0.95
0.9
0.85
0.8
-25 0 25 50 75 100 125 150
Figure 2. Feedback Source Current
1.1
1.05
Ipeak 1
0.95
0.9
0.85
0.8
-25 0
25 50 75 100 125 150
Figure 4. Peak Current Limit
1.15
1.1
1.05
Vstart 1
0.95
0.9
0.85
-25 0 25 50 75 100 125 150
Figure 6. Start Threshold Voltage
5

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