LM1951 Switch Datasheet

LM1951 Datasheet, PDF, Equivalent


Part Number

LM1951

Description

LM1951 Solid State 1 Amp Switch

Manufacture

National Semiconductor

Total Page 10 Pages
Datasheet
Download LM1951 Datasheet


LM1951
August 1992
LM1951 Solid State 1 Amp Switch
General Description
The LM1951 is a high current high voltage high side (PNP)
switch with a built-in error detection circuit
The LM1951 is guaranteed to deliver 1 Amp output current
and is capable of withstanding up to g85V transients The
built-in error detection provides an error flag output under
the following fault conditions output short to ground or sup-
ply open load current limit overvoltage or thermal shut-
down The LM1951 will drive all types of resistive or induc-
tive loads The output has a built-in negative voltage clamp
( b30V) to provide a quick energy discharge path for
inductive loads The LM1951 features TTL and CMOS com-
patible logic input with hysteresis Switching times both turn
on and turn off are 2 ms (Cload k 0 005 mF) In addition its
quiescent current in the OFF state is typically less than
0 1 mA at room temperature and less than 10 mA over the
entire operating temperature and voltage range
The LM1951 features make it well suited for industrial and
automotive applications
Features
Y 0 1 mA typical quiescent current (OFF state)
Y 1 Amp output current guaranteed
Y g85V transient protection
Y Reverse voltage protection
Y Negative output voltage clamp
Y Error flag output
Y Internal overvoltage shutdown
Y Internal thermal shutdown
Y Short circuit proof
Y High speed switching (up to 50 kHz)
Y Inductive or resistive loads
Y Low ON resistance (1X maximum)
Y TTL CMOS compatible input with hysteresis
Y Plastic TO-220 5-lead package
Y ESD protected
Y 4 5V to 26V operation
Typical Application Circuit and Connection Diagram
VIN Output
0 OFF
1 ON
TO-220 5-Lead
TL H 9133 – 1
Front View
Order Number LM1951T
See NS Package Number T05A
TL H 9133 – 2
C1995 National Semiconductor Corporation TL H 9133
RRD-B30M115 Printed in U S A

LM1951
Absolute Maximum Ratings
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage
Operational Voltage
26 VDC
Sustained Voltage
b40 VDC t VCC s 85 VDC
Transient Voltage Protection
g85V
(u e 100 ms 1% Duty Cycle RS t 10X)
Pins 4 5
26 VDC
Power Dissipation (Note 1)
Load Inductance
Operating Temperature Range (TA)
Maximum Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering 10 sec )
ESD Tolerance (Note 4)
Internally Limited
1H
b40 C to a125 C
150 C
b65 C to a150 C
260 C
2000V
Electrical Characteristics
VCC e 12V Iout e 500 mA Cout e 0 001 mF TA e 25 C unless otherwise specified
Parameter
Conditions
Typical
Tested
Limit
(Note 2)
Design
Limit
(Note 3)
Units
Supply Voltage VCC
Operational
Transient
u e 100 ms 1% Duty Cycle RCC t 10X
45
26
b85
85
Vmin
Vmax
V
V
Supply Current
Iout e 0 mA VON OFF e 0 8V
0 1 10 100 mAmax
Iout e 250 mA VON OFF e 2 0V
260 270
mAmax
Iout e 600 mA VON OFF e 2 0V
630 650
mAmax
Iout e 1A VON OFF e 2 0V
1 06 1 2
Amax
Voltage Drop
(VCC b VOUT)
Iout e 600 mA VON OFF e 2 0V
Iout e 1A VON OFF e 2 0V
400 600
07 10
mVmax
Vmax
Short Circuit Current
VOUT e 0V VON OFF e 2V
13 10
25
Amin
Amax
Input Threshold Pin 5
4 5V s VCC s 26V
Turn ON
1 4 2 0 2 0 Vmax
Turn OFF
1 2 0 8 0 8 Vmin
Input Current Pin 5
0 8V s VON OFF s 5 5V
50
25
10
mAmax
mAmin
Output Clamp
Iout s 600 mA
b30
b40
b24
Vmin
Vmax
Delay
Time
td ON
td OFF
Rload e 20X Cload e 0 001 mF
13
13
msmax
msmax
Rise Time
13
msmax
Fall Time
13
msmax
Error Flag Characteristics
Output Voltage
Error Condition Pin 4 Low Sinking 10 mA
03 08
Vmax
Sink Current
Error Condition Pin 4 e 0 3V
10 3
mAmin
Output Leakage Current No Error Pin 4 e 26V
0 01 1
mAmax
Response Time
VLOGIC e 5V RLOGIC e 2 kX CLOGIC e 0 mF
1
ms
Note 1 Thermal resistance junction-to-case is 3 C W Thermal resistance case-to-ambient is 50 C W
Note 2 Tested Limits are guaranteed and 100% production tested
Note 3 Design Limits are guaranteed (but not 100% production tested) over the operating temperature and supply voltage range These limits are not used to
calculate outgoing quality levels
Note 4 Human body model 100 pF discharged through a 1 5 kX resistor
2


Features LM1951 Solid State 1 Amp Switch August 1992 LM1951 Solid State 1 Amp Switch G eneral Description The LM1951 is a high current high voltage high side (PNP) s witch with a built-in error detection c ircuit The LM1951 is guaranteed to deli ver 1 Amp output current and is capable of withstanding up to g 85V transients The built-in error detection provides an error flag output under the followin g fault conditions output short to grou nd or supply open load current limit ov ervoltage or thermal shutdown The LM195 1 will drive all types of resistive or inductive loads The output has a built- in negative voltage clamp b 30V) to pro vide a quick energy discharge path for ( inductive loads The LM1951 features T TL and CMOS compatible logic input with hysteresis Switching times both turn o n and turn off are 2 ms (Cload k 0 005 mF) In addition its quiescent current i n the OFF state is typically less than 0 1 mA at room temperature and less tha n 10 mA over the entire operating temperature and voltage range.
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