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LP395 Datasheet(PDF) 1 Page - Texas Instruments

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Part # LP395
Description  Ultra Reliable Power Transistor
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LP395 Datasheet(HTML) 1 Page - Texas Instruments

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LP395
www.ti.com
SNOSBF3C – APRIL 1998 – REVISED MARCH 2013
LP395 Ultra Reliable Power Transistor
Check for Samples: LP395
The LP395 is easy to use and only a few precautions
1
FEATURES
need be observed. Excessive collector to emitter
2
Internal Thermal Limiting
voltage can destroy the LP395 as with any transistor.
Internal Current and Power Limiting
When the device is used as an emitter follower with a
low source impedance, it is necessary to insert a 4.7
Specified 100 mA Output Current
k
Ω resistor in series with the base lead to prevent
0.5
μA Typical Base Current
possible emitter follower oscillations. Also since it has
Directly Interfaces with TTL or CMOS
good high frequency response, supply by-passing is
recommended.
+36 Volts On Base Causes No Damage
2
μs Switching Time
Areas where the LP395 differs from a standard NPN
transistor
are
in
saturation
voltage,
leakage
(quiescent) current and in base current. Since the
DESCRIPTION
internal protection circuitry requires voltage and
The LP395 is a fast monolithic transistor with
current to function, the minimum voltage across the
complete overload protection. This very high gain
device in the on condition (saturated) is typically 1.6
transistor has included on the chip, current limiting,
Volts, while in the off condition the quiescent
power limiting, and thermal overload protection,
(leakage) current is typically 200
μA. Base current in
making it difficult to destroy from almost any type of
this device flows out of the base lead, rather than into
overload. Available in an epoxy TO-92 transistor
the base as is the case with conventional NPN
package this device is specified to deliver 100 mA.
transistors. Also the base can be driven positive up to
Thermal limiting at the chip level, a feature not
36 Volts without damage, but will draw current if
available
in
discrete
designs,
provides
driven negative more than 0.6 Volts. Additionally, if
comprehensive
protection
against
overload.
the base lead is left open, the LP395 will turn on.
Excessive power dissipation or inadequate heat
The LP395 is a low-power version of the 1-Amp
sinking causes the thermal limiting circuitry to turn off
LM195/LM295/LM395
Ultra
Reliable
Power
the device preventing excessive die temperature.
Transistor.
The LP395 offers a significant increase in reliability
The LP395 is rated for operation over a
−40°C to
while simplifying protection circuitry. It is especially
+125°C range.
attractive as a small incandescent lamp or solenoid
driver because of its low drive requirements and
blowout-proof design.
Connection Diagram
Typical Applications
Figure 1. TO-92 Package
See NS Package LP0003A
Figure 2. Fully Protected Lamp Driver
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 1998–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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