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KA5L0565RYDTU Datasheet, PDF (1/10 Pages) Fairchild Semiconductor – Fairchild Power Switch
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
9V
1mA
2.5R
1R
+
OSC
−
+
S
Q
R
L.E.B
0.1V
−
+
Thermal S/D
S
Q
R
−
OVER VOLTAGE S/D
Power on reset
SFET
©2004 Fairchild Semiconductor Corporation
#2 DRAIN
#1 GND
Rev.1.0.0