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LP395 Datasheet(PDF) 1 Page - Texas Instruments |
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LP395 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 12 page 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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