www.fairchildsemi.com
KA5x03xx-SERIES
KA5H0365R, KA5M0365R, KA5L0365R, KA5M0365RN,
KA5L0365RN, KA5H0380R, KA5M0380R, KA5L0380R
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 Current Protection
• Over Voltage Protection (Min. 25V)
• Internal Thermal Shutdown Function
• Under Voltage Lockout
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 either a flyback converter or a forward
converter
• Internal High Voltage Sense FET
• Auto-Restart Mode
Applications
• SMPS for VCR, SVR, STB, DVD & DVCD
• SMPS for Printer, Facsimile & Scanner
• Adaptor for Camcorder
TO-220F-4L
8-DIP
1.6.7.8 Drain
2. GND
1
3. V
CC
1. GND 2. Drain 3. V
4. FB
CC
4. FB 5. NC
Internal Block Diagram
#3 V
CC
#2 DRAIN
32V
5V
Vref
Internal
bias
SFET
(*#3 V
CC
)
Good
logic
(*#1.6.7.8 DRAIN)
OSC
9V
S
R
Q
5µA
1mA
−
#4 FB
L.E.B
0.1V
2.5R
1R
+
(*#4 FB)
+
S
R
#1 GND
−
7.5V
27V
Q
Thermal S/D
OVER VOLTAGE S/D
+
(*#2 GND)
Power on reset
−
*Asterisk - KA5M0365RN, KA5L0365RN
Rev.1.0.5
©2002 Fairchild Semiconductor Corporation