LM395T/NOPB National Semiconductor, LM395T/NOPB Datasheet

LM395T/NOPB

Manufacturer Part Number

LM395T/NOPB

Description

IC TRANSIS ULTR REL PWR TO220-3

Manufacturer

National Semiconductor

Type

Powerr

Datasheets

1.LM395TNOPB.pdf (13 pages)

2.LM395TNOPB.pdf (3 pages)

Specifications of LM395T/NOPB

Transistor Type

NPN

Current - Collector (ic) (max)

2.2A

Voltage - Collector Emitter Breakdown (max)

36V

Mounting Type

Through Hole

Package / Case

TO-220-3 (Straight Leads)

Current, Collector

2.2 A

Package Type

TO-220

Polarity

NPN

Primary Type

Resistance, Thermal, Junction To Case

6 °C/W

Voltage, Breakdown, Collector To Emitter

42 V

Voltage, Collector To Base

36 V

Voltage, Collector To Emitter

36 V

Voltage, Collector To Emitter, Saturation

1.8 V

Voltage, Emitter To Base

36 V

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Power - Max

Current - Collector Cutoff (max)

Frequency - Transition

Dc Current Gain (hfe) (min) @ Ic, Vce

Vce Saturation (max) @ Ib, Ic

Lead Free Status / Rohs Status

RoHS Compliant part Electrostatic Device

Other names

*LM395T
*LM395T/NOPB
LM395T

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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

00600916

Related parts for LM395T/NOPB

LM395T/NOPB Summary of contents

Page 1

... LM195 as with any power transistor. When the device is used as an emitter follower with low source imped- Simplified Circuit © 2004 National Semiconductor Corporation ance 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 ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Collector to Emitter Voltage LM195 LM395 Collector to Base Voltage LM195 LM395 Base to Emitter Voltage (Forward) LM195 LM395 Preconditioning 100% Burn-In In Thermal Limit ...

Page 3

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) TO-220 Plastic Package Order Number LM395T NS Package Number T03B ...

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