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Fairchild Semiconductor - KA3S1265R

Numéro de référence 3S1265R
Description KA3S1265R
Fabricant Fairchild Semiconductor 
Logo Fairchild Semiconductor 





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3S1265R fiche technique
KA3S1265R/KA3S1265RF/
KA3S1265RD
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
• Auto Restart Mode
www.DataSheet4U.com
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 IC.
Included 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 C-TV power supply.
TO-3P-5L
TO-3PF-5L
Internal Block Diagram
11
1. DRAIN 2. GND 3. Vcc 4. FB 5. Sync
#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
25V
OVER VOLTAGE S/D
S
Q
R
Power on reset
SFET
#1 DRAIN
#2 GND
©2001 Fairchild Semiconductor Corporation
Rev.1.0.2

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