LM395T National Semiconductor, LM395T Datasheet

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

C-e Breakdown Voltage

60V

Mounting Type

Through Hole

Peak Reflow Compatible (260 C)

Current Rating

2.2A

No. Of Circuits

Leaded Process Compatible

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM395T

Manufacturer:

Quantity:

Company:

BOSTOCK HK LIMITED

Part Number:

LM395T

Manufacturer:

NSC

Quantity:

2 600

Company:

Meier Automation Equipment Co., Limited

Part Number:

LM395T

Manufacturer:

NS/国半

Quantity:

20 000

Current page: 1 of 13
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LM195/LM395

Ultra Reliable Power Transistors

General Description

The LM195/LM395 are fast, monolithic power transistors

with complete overload protection. These devices, which act

as high gain power transistors, have included on the chip,

current limiting, power limiting, and thermal overload protec-

tion making them virtually impossible to destroy from any

type of overload. In the standard TO-3 transistor power pack-

age, the LM195 will deliver load currents in excess 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 de-

vice is used as an emitter follower with low source imped-

Simplified Circuit

DS006009

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 fol-

lower, the resistor eliminates the possibility of trouble without

degrading performance. Finally, since it has good high fre-

quency 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 standard TO-3 power

packages and solid Kovar TO-5. The LM195 is rated for op-

eration 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

DS006009-1

www.national.com

June 1999

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