LP395Z/LFT1

LP395 www.ti.com SNOSBF3C – APRIL 1998 – REVISED MARCH 2013 LP395 Ultra Reliable Power Transistor Check for Samples: LP395 FEATURES 1 • • • • • • • 2 Internal Thermal Limiting Internal Current and Power Limiting Specified 100 mA Output Current 0.5 μA Typical Base Current Directly Interfaces with TTL or CMOS +36 Volts On Base Causes No Damage 2 μs Switching Time DESCRIPTION The LP395 is a fast monolithic transistor with complete overload protection. This very high gain transistor has included on the chip, current limiting, power limiting, and thermal overload protection, making it difficult to destroy from almost any type of overload. Available in an epoxy TO-92 transistor package this device is specified to deliver 100 mA. Thermal limiting at the chip level, a feature not available in discrete designs, provides comprehensive protection against overload. Excessive power dissipation or inadequate heat sinking causes the thermal limiting circuitry to turn off the device preventing excessive die temperature. The LP395 offers a significant increase in reliability while simplifying protection circuitry. It is especially attractive as a small incandescent lamp or solenoid driver because of its low drive requirements and blowout-proof design. Connection Diagram The LP395 is easy to use and only a few precautions need be observed. Excessive collector to emitter voltage can destroy the LP395 as with any transistor. When the device is used as an emitter follower with a low source impedance, it is necessary to insert a 4.7 kΩ resistor in series with the base lead to prevent possible emitter follower oscillations. Also since it has good high frequency response, supply by-passing is recommended. Areas where the LP395 differs from a standard NPN transistor are in saturation voltage, leakage (quiescent) current and in base current. Since the internal protection circuitry requires voltage and current to function, the minimum voltage across the device in the on condition (saturated) is typically 1.6 Volts, while in the off condition the quiescent (leakage) current is typically 200 μA. Base current in this device flows out of the base lead, rather than into the base as is the case with conventional NPN transistors. Also the base can be driven positive up to 36 Volts without damage, but will draw current if driven negative more than 0.6 Volts. Additionally, if the base lead is left open, the LP395 will turn on. The LP395 is a low-power version of the 1-Amp LM195/LM295/LM395 Ultra Reliable Power Transistor. The LP395 is rated for operation over a −40°C to +125°C range. Typical Applications Figure 1. TO-92 Package See NS Package LP0003A Figure 2. Fully Protected Lamp Driver 1 2 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. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 1998–2013, Texas Instruments Incorporated LP395 SNOSBF3C – APRIL 1998 – REVISED MARCH 2013 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. ABSOLUTE MAXIMUM RATINGS (1) Collector to Emitter Voltage 36V Collector to Base Voltage 36V Base to Emitter Voltage (Forward) 36V Base to Emitter Voltage (Reverse) 10V Base to Emitter Current (Reverse) 20 mA Collector Current Limit Internally Limited Power Dissipation Internally Limited Operating Temperature Range −40°C to +125°C Storage Temperature Range −65°C to +150°C Lead Temp. (Soldering, 10 seconds) (1) 260°C Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not ensure specific performance limits. ELECTRICAL CHARACTERISTICS Symbol VCE Parameter Collector to Emitter Conditions Typical 0.5 mA ≤ IC ≤ 100 mA Tested Limit Design Limit (1) (2) Units (Limit) 36 36 V(Max) (3) Operating Voltage ICL Collector Current Limit (4) VBE = 2V, VCE = 36V 45 25 20 mA(Min) VBE = 2V, VCE = 15V 90 60 50 mA(Min) mA(Min) VBE = 2V, 2V ≤ VCE ≤ 6V 130 100 100 IB Base Current 0 ≤ IC ≤ 100 mA −0.3 −2.0 −2.5 μA(Max) IQ Quiescent Current VBE = 0V, 0 ≤ VCE ≤ 36V 0.24 0.50 0.60 mA(Max) VCE(SAT) Saturation Voltage VBE = 2V, IC = 100 mA 1.82 2.00 2.10 V(Max) BVBE Base to Emitter Break- 0 ≤ VCE ≤ 36V, IB = 2 μA 36 36 V(Min) 0.79 0.90 V(Max) 1.40 V (Max) down Voltage VBE (4) Base to Emitter Voltage (5) tS Switching Time IC = 5 mA IC = 100 mA 0.69 (4) VCE = 20V, RL = 200Ω 1.02 μs 2 VBE = 0V, +2V, 0V θJA Thermal Resistance 0.4″ leads soldered to Junction to Ambient printed circuit board 0.125″ leads soldered to printed circuit board (1) (2) (3) (4) (5) 2 150 180 °C/W (Max) 130 160 °C/W (Max) Specified and 100% production tested. Specified (but not 100% production tested) over the operating temperature and supply voltage ranges. These limits are not used to calculate outgoing quality levels. Parameters identified with boldface type apply at temp. extremes. All other numbers, unless noted apply at +25°C. These numbers apply for pulse testing with a low duty cycle. Base positive with respect to emitter. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LP395 LP395 www.ti.com SNOSBF3C – APRIL 1998 – REVISED MARCH 2013 SIMPLIFIED CIRCUIT APPLICATIONS INFORMATION One failure mode incandescent lamps may experience is one in which the filament resistance drops to a very low value before it actually blows out. This is especially rough on most solid-state lamp drivers and in most cases a lamp failure of this type will also cause the lamp driver to fail. Because of its high gain and blowout-proof design, the LP395 is an ideal candidate for reliably driving small incandescent lamps. Additionally, the current limiting characteristics of the LP395 are advantageous as it serves to limit the cold filament inrush current, thus increasing lamp life. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LP395 3 LP395 SNOSBF3C – APRIL 1998 – REVISED MARCH 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS 4 5 Volt Transfer Function 36 Volt Transfer Function Figure 3. Figure 4. Collector Characteristics Available Collector Current Figure 5. Figure 6. Quiescent Collector Current Saturation Voltage Figure 7. Figure 8. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LP395 LP395 www.ti.com SNOSBF3C – APRIL 1998 – REVISED MARCH 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Collector Current Threshold Figure 9. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LP395 5 LP395 SNOSBF3C – APRIL 1998 – REVISED MARCH 2013 www.ti.com TYPICAL APPLICATIONS Figure 10. Lamp Flasher (Short Circuit Proof) Figure 11. Optically Isolated Switch Figure 12. Two Terminal Current Limiter Figure 13. Composite PNP 6 Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LP395 LP395 www.ti.com SNOSBF3C – APRIL 1998 – REVISED MARCH 2013 REVISION HISTORY Changes from Revision B (March 2013) to Revision C • Page Changed layout of National Data Sheet to TI format ............................................................................................................ 6 Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LP395 7 PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) LP395Z/LFT1 ACTIVE TO-92 LP 3 2000 RoHS & Green SN N / A for Pkg Type LP395Z/NOPB ACTIVE TO-92 LP 3 1800 RoHS & Green SN N / A for Pkg Type LP 395Z -40 to 125 LP 395Z (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of