KA3S1265R Datasheet, PDF (1/12 Pages) Fairchild Semiconductor – Fairchild Power Switch(FPS)

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
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
1
1
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