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參數資料
| 型號： | LM1951 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | LM1951 Solid State 1 Amp Switch |
| 中文描述： | LM1951固態1安培開關 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 171K |
| 代理商： | LM1951 |
TL/H/9133
L
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
g
85V 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
(
&
b
30V) 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
m
s (C
load
k
0.005
m
F). In addition, its
quiescent current in the OFF state is typically less than
0.1
m
A at room temperature and less than 10
m
A over the
entire operating temperature and voltage range.
The LM1951 features make it well suited for industrial and
automotive applications.
Features
Y
0.1
m
A typical quiescent current (OFF state)
Y
1 Amp output current guaranteed
Y
g
85V 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 (1
X
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
TL/H/9133–1
V
IN
Output
0
OFF
1
ON
TO-220, 5-Lead
TL/H/9133–2
Front View
Order Number LM1951T
See NS Package Number T05A
C
1995 National Semiconductor Corporation
RRD-B30M115/Printed in U. S. A.
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