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LM1950 Schematic ( PDF Datasheet ) - National Semiconductor

Teilenummer LM1950
Beschreibung 750mA High Side Switch
Hersteller National Semiconductor
Logo National Semiconductor Logo 




Gesamt 6 Seiten
LM1950 Datasheet, Funktion
December 1991
LM1950 750 mA High Side Switch
General Description
The LM1950 is a high current high side (PNP) power switch
for driving ground referenced loads Intended for industrial
and automotive applications the LM1950 is guaranteed to
deliver 750 mA continuous load current (with typically 1 4
Amps peak) and can withstand supply voltage transients up
to a60V and b50V When switched OFF the quiescent
current drain from the input power supply is less than
100 mA which can allow continuous connection to a battery
power source
The LM1950 will drive all types of resistive or reactive loads
To obtain a rapid decay time of the energy in inductive
loads the output is internally protected but not clamped and
can swing below ground to at least 54V negative with re-
spect to the input power supply voltage
The ON OFF input can be driven with standard 5V TTL or
CMOS compatible logic levels independent of the VCC sup-
ply voltage used Built in protection features include short
circuit protection thermal shutdown over-voltage shutdown
to protect load circuits and protection against reverse polari-
ty input connections The LM1950 is available in a 5-lead
power TO-220 package and specified over a wide b40 C to
125 C operating temperature range
Features
Y 750 mA continuous output drive current
Y Less than 100 mA quiescent current in OFF state
Y Low input output voltage drop
Y a60V b50V transient protection
Y Drives resistive or reactive loads
Y Unclamped output for fast inductive decay tmies
Y Reverse battery protected
Y Short circuit proof
Y Overvoltage shutdown to protect loads
Y TTL CMOS compatible control input
Y Thermal overload protection
Applications
Y Relay driver
Y Solenoid Valve driver
Y Lamp driver
Y Load circuit switching
Y Motor driver
Typical Application
Connection Diagram
TO 220 5 Lead
TL H 11237 – 1
Required for stability
C1995 National Semiconductor Corporation TL H 11237
Front View
Order Number LM1950T
See NS Package Number T05A
TL H 11237 – 2
RRD-B30M115 Printed in U S A






LM1950 Datasheet, Funktion
Physical Dimensions inches (millimeters)
Order Number LM1950T
NS Package Number T05A
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SEMICONDUCTOR CORPORATION As used herein
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failure to perform when properly used in accordance
with instructions for use provided in the labeling can
be reasonably expected to result in a significant injury
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support device or system whose failure to perform can
be reasonably expected to cause the failure of the life
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