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KA5L0380 fiches techniques PDF

Fairchild - SPS consist of high voltage power SenseFET and current mode PWM IC

Numéro de référence KA5L0380
Description SPS consist of high voltage power SenseFET and current mode PWM IC
Fabricant Fairchild 
Logo Fairchild 





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KA5L0380 fiche technique
www.fairchildsemi.com
KA5H0380R/KA5M0380R/KA5L0380R
SPS
Features
• Precision fixed operating frequency (100/67/50kHz)
• Low start-up current(typ. 100uA)
• Pulse by pulse current limiting
• Over current protection
• Over voltage protecton (Min. 25V)
• Internal thermal shutdown function
• Under voltage lockout
• Internal high voltage sense FET
• Auto-restart mode
Description
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 fre-
quency oscillator, under voltage lock-out, leading edge
blanking, optimized gate turn-on/turn-off driver, thermal
shutdown protection, over voltage protection, and tempera-
ture compensated precision current sources for loopcompen-
sation and fault protection circuitry. Compared to discrete
MOSFET and PWM controller or RCC solution, a SPS can
reduce total component count, design size, weight and at the
same time increase efficiency, productivity, and system reli-
ability. It has a basic platform well suited for cost-effective
design in either a flyback converter or a forward converter.
TO-220F-4L
Internal Block Diagram
1. GND 2. DRAIN 3. VCC 4. FB
Vcc
FB
5 uA
UVLO
9V
1 mA
2.5R
1R
5V
Vref
OSC
_
+
GOOD
LOGIC
INTERNAL
BIAS
S
Q
R
L.E.B
SFET
7.5V
+
_
27V
+
_
THERMAL S/D
S
Q
R
Rsens
POWER ON RESET
©2000 Fairchild Semiconductor International
DRAIN
GND
Rev. .5.0

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