Power Switch - Fairchild
Description
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fairchildsemi.
com
KA5Q0765RTH
Features
• • • • • • • • • •
Fairchild Power Switch(FPS)
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.
The integrated PWM controller includes the fixed oscillator, the under voltage lock out, the leading edge blanking, the optimized gate turn-on/turn-off driver, the thermal shut down protection, the over voltage protection, and the temperature compensated precision current sources for loop compensation and fault protection circuitry.
Compared to a discrete MOSFET and a controller or a RCC switching converter solutions, a Fairchild Power Switch(FPS) can reduce the total number of components, design size, and weight, so it will improve efficiency, productivity, and system reliability.
It has a basic platform well suited for cost-effective design in a quasi-resonant converter as a C-TV power supply.
TO-220F-5L
Quasi Resonant Converter Controller Internal Burst Mode Controller for Stand-by Mode Pulse by Pulse Current Limiting Over Current Latch Protection Over Voltage Protection (Vsync: Min.
11V) Internal Thermal Shutdown Function Under Voltage Lockout Internal High Voltage Sense FET Auto-Restart Mode Primary Side Regulation
1.
Drain 2.
GND 3.
VCC 4.
Feedback 5.
Sync
Internal Block Diagram
VCC DRAIN
3
+ 32V + -1% 11V on 12V off Burst Mode 3.
5V/1.
25V Internal BIAS
1
+
VREF
+ UVLO 15V/9V
+
S Ro Ron n QB
SYNC
5
Normal Mode 4.
6V/2.
6V VREF
+ -
OSC
R
Roff f
Rof
Ifb
LEB 450ns
FEEDBACK
4
2.
5R R
+
Idelay
1V
+ S Q
Offset
+
7.
5V
Delay 80ns
+ -
OLP
Power on Reset
OCL
Thermal Shut Down Power on Reset (VCC=6.
5V)
+ -
Rsense 1V
R Q S R
Sync 12V
2 SOURCE
OVP
Rev.
1.
0.
3
©2004 Fairchild Semiconductor Corporation
KA5Q0765RTH
Absolute Maximum Ratings
(Ta=25°C, unless otherwise specified) Parameter Drain-source Voltage Drain-Gate...
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