LM395T National Semiconductor, LM395T Datasheet
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LM395T
Manufacturer Part Number
LM395T
Description
Controller IC
Manufacturer
National Semiconductor
Datasheets
1.LM395T.pdf
(13 pages)
2.LM395T.pdf
(13 pages)
3.LM395T.pdf
(13 pages)
4.LM395T.pdf
(15 pages)
Specifications of LM395T
Termination Type
Through Hole
No. Of Pins
3
C-e Breakdown Voltage
60V
Mounting Type
Through Hole
Peak Reflow Compatible (260 C)
No
Current Rating
2.2A
No. Of Circuits
1
Leaded Process Compatible
No
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM395T
Manufacturer:
NS/国半
Quantity:
20 000
© 2004 National Semiconductor Corporation
LM195/LM395
Ultra Reliable Power Transistors
General Description
The LM195/LM395 are fast, monolithic power integrated
circuits with complete overload protection. These devices,
which act as high gain power transistors, have included on
the chip, current limiting, power limiting, and thermal over-
load protection making them virtually impossible to destroy
from any type of overload. In the standard TO-3 transistor
power package, the LM195 will deliver load currents in ex-
cess of 1.0A and can switch 40V in 500 ns.
The inclusion of thermal limiting, a feature not easily avail-
able in discrete designs, provides virtually absolute protec-
tion against overload. Excessive power dissipation or inad-
equate heat sinking causes the thermal limiting circuitry to
turn off the device preventing excessive heating.
The LM195 offers a significant increase in reliability as well
as simplifying power circuitry. In some applications, where
protection is unusually difficult, such as switching regulators,
lamp or solenoid drivers where normal power dissipation is
low, the LM195 is especially advantageous.
The LM195 is easy to use and only a few precautions need
be observed. Excessive collector to emitter voltage can de-
stroy the LM195 as with any power transistor. When the
device is used as an emitter follower with low source imped-
Simplified Circuit
DS006009
00600901
ance, it is necessary to insert a 5.0k resistor in series with
the base lead to prevent possible emitter follower oscilla-
tions. Although the device is usually stable as an emitter
follower, the resistor eliminates the possibility of trouble with-
out degrading performance. Finally, since it has good high
frequency response, supply bypassing is recommended.
For low-power applications (under 100 mA), refer to the
LP395 Ultra Reliable Power Transistor.
The LM195/LM395 are available in the standard TO-3, Kovar
TO-5, and TO-220 packages. The LM195 is rated for opera-
tion from −55˚C to +150˚C and the LM395 from 0˚C to
+125˚C.
Features
n Internal thermal limiting
n Greater than 1.0A output current
n 3.0 µA typical base current
n 500 ns switching time
n 2.0V saturation
n Base can be driven up to 40V without damage
n Directly interfaces with CMOS or TTL
n 100% electrical burn-in
1.0 Amp Lamp Flasher
www.national.com
00600916
July 2000