LM395

更新时间： 2024-09-26 22:51:51

品牌	Logo	应用领域
美国国家半导体 - NSC		晶体晶体管
页数	文件大小	规格书
13页	424K
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Ultra Reliable Power Transistors

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LM395 数据手册

June 1999

LM195/LM395

Ultra Reliable Power Transistors

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.

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.

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.

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.

Features

n Internal thermal limiting

n Greater than 1.0A output current

n 3.0 µA typical base current

n 500 ns switching time

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.

n 2.0V saturation

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-

n Base can be driven up to 40V without damage

n Directly interfaces with CMOS or TTL

n 100% electrical burn-in

Simplified Circuit

DS006009-1

DS006009

www.national.com

12 3 4 5 6 7...13

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与LM395相关器件

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LM39500	HTC	获取价格	5A Low-Voltage Low-Dropout Regulator
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LM39500-5.0	HTC	获取价格	5A Low-Voltage Low-Dropout Regulator
LM39500R	HTC	获取价格	5A Low-Voltage Low-Dropout Regulator
LM39500R-1.5	HTC	获取价格	5A Low-Voltage Low-Dropout Regulator
LM39500R-1.8	HTC	获取价格	5A Low-Voltage Low-Dropout Regulator

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