SPS
KA1M0880
SPS
TO-3P-5L
The SPS product family is specially designed for an off-line
SMPS with minimal external components. The SPS 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 discrete MOSFET and controller or
RCC switching converter solution, a SPS 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 design in either
a flyback converter or a forward converter.
1.DRAIN 2. GND 3. V
CC
4. FB 5. S/S
FEATURES
ORDERING INFORMATION
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Precision fixed operating frequency (70kHz)
Pulse by pulse over current limiting
Over Current Protection
Over Voltage Protection (Min. 23V)
Internal thermal shutdown function
Under voltage lockout
Internal high voltage sense FET
Latch up mode
Soft start
Device
KA1M0880
Package
TO-3P-5L
Operating Temperature
−25°C
to +85°C
BLOCK DIAGRAM
#3 V
CC
32V
5V
Vref
Good
logic
#5 Soft Start
5V
OSC
S
R
#4 FB
5µA
1mA 2.5R
1R
9V
+
7.5V
−
+
25V
−
Thermal S/D
OVER VOLTAGE S/D
−
+
L.E.B
0.1V
S
R
Q
#2 GND
Q
Internal
bias
#1 DRAIN
SFET
Power on reset
Rev. B
1
©
1999 Fairchild Semiconductor Corporation
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
