KA5P0680C Datasheet, PDF (1/10 Pages) Fairchild Semiconductor – Fairchild Power Switch(FPS)

KA5P0680C
Fairchild Power Switch(FPS)
www.fairchildsemi.com
Features
• Adjustable Switching Frequency
• Intelligent Power Saving Mode
• Pulse by Pulse Current Limiting
• Over Current Latch Protection
• Over Voltage Protection
• Internal Thermal Shutdown Function
• Built-in Soft Start Function
• Internal High Voltage Sense FET
• 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 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. compared to dis-
crete MOSFET and controller or RCC switching
converter solution, a Fairchild Power Switch(FPS) can
reduce 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 cost
effective design in PC SMPS with Power Saving function.
TO-220-5L
Internal Block Diagram
1
1. Drain 2. GND 3. VCC 4. FB 5. CT
Ct 5
Feedback 4
Vcc
3
UVLO
VCC
15V/9V
VREF
5uA
900uA
Vref
2.5V
OSC _CLK
BIAS
GOOD LOGIC
VG
LIMIT
CIRCUIT
Drain
1
SenseFET
VG
SQ
R
2.5R
R
SOFT-START
(5mS)/( 0 ~ 5V )
2V
OLP
(Vfb=7V)
OVP
(Vcc=27V)
0.7V
AUTO
RESTART
0.5V
S
Q
R
0.4V/0.6V
S
Q
R
LEB
VZ
VCC
PS MODE
5uA
Vs
Rsense
2 GND
1mS
OCL
(Vs=1.1V)
OUTPUT OFF
TSD
(Tj=170 ℃)
POWER-ON
RESET
S
Q
R
OUTPUT OFF
Shutdown Latch
©2003 Fairchild Semiconductor Corporation
Rev.1.0.3