LM1950 750 mA High Side Switch
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
a
60V and
b
50V 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 V
CC
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
b
40 C to
125 C operating temperature range
Features
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
750 mA continuous output drive current
Less than 100
mA
quiescent current in OFF state
Low input output voltage drop
a
60V
b
50V transient protection
Drives resistive or reactive loads
Unclamped output for fast inductive decay tmies
Reverse battery protected
Short circuit proof
Overvoltage shutdown to protect loads
TTL CMOS compatible control input
Thermal overload protection
Applications
Y
Y
Y
Y
Y
Relay driver
Solenoid Valve driver
Lamp driver
Load circuit switching
Motor driver
Typical Application
TL H 11237 鈥?1
Connection Diagram
TO 220 5 Lead
Required for stability
TL H 11237 鈥?2
Front View
Order Number LM1950T
See NS Package Number T05A
C
1995 National Semiconductor Corporation
TL H 11237
RRD-B30M115 Printed in U S A
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