www.fairchildsemi.com
KA5x0165Rxx-SERIES
KA5H0165R/RN, KA5M0165R/RN, KA5L0165R/RN,
KA5H0165RVN
Fairchild Power Switch(FPS)
Features
Description
• Precision Fixed Operating Frequency (100/67/50kHz )
• Low Start-up Current (Typ. 100uA)
• Pulse by Pulse Current Limiting
• Over Load Protection
• Over Voltage Protection (Min. 25V)
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
PWM controller features integrated fixed oscillator, under
voltage lock out, leading edge blanking, optimized gate turn-on/
turn-off driver, thermal shut down protection, over voltage
protection, and temperature compensated precision current
sources for loop compensation and fault protection circuitry
- except KA5H0165RVN
• Internal Thermal Shutdown Function
• Under Voltage Lockout
• Internal High Voltage Sense FET
• Auto-Restart Mode
compared to discrete MOSFET and controller or R
CC
switching converter solution, The Fairchild Power Switch(FPS)
can reduce total component count, design size, weight and at the
same time increase efficiency, productivity, and system
reliability. It is well suited for cost effective design of flyback
converters.
TO-220F-4L
8-DIP
1
1
1.6.7.8. Drain
2. GND
3. Vcc
4. FB
5. NC
1. GND
2. Drain
3. Vcc
4. FB
Internal Block Diagram
V
CC
DRAIN
32V
5V
Vref
Internal
bias
SFET
Good
logic
OSC
S
R
uA
Q
−
FB
L.E.B
2.5R
5µA
1mA
9V
+
1R
0.1V
+
S
R
GND
−
7.5V
27V
Q
Thermal S/D
OVER VOLTAGE S/D
+
Power on reset
−
Rev.1.0.5
©2003 Fairchild Semiconductor Corporation