In a pnp transistor, the emitterbase region is forward biased, so holes are injected into the base as minority carriers. Zxtp25140bfh 140v, sot23, pnp medium power transistor. Because of the high voltage of 11volts on the base of q1 will destroy the io pin limited to 5volts we must use a npn transistor switch q2 as a predriver. See detailed ordering and shipping information in the package. Silicon pnp switching transistor stmicroelectronics preferred salestype pnp transistor applications. This parameter is the collector to base breakdown voltage of a bipolar transistor. Technical literature, 12790, product development, specification, datasheet, 2stn2540 created date. The chip has a low output signal for the active output. This will apply the 12 v to the chip output and destroy it or, if there are protection diodes on the output, the current will flow through the protection diodes into. Im using 4 outputs from a basic stamp to control 14 outputs turning onoff 24 volt pneumatic valve portsthrough a 74ls154 demultiplexer chip. General purpose switching and amplification sot23 parameter symbol value unit collector base voltage bc856 bc857 bc858 vcbo805030.
Pnp switching transistor bsr12 features low current max. Pnp switching transistor 2n3906 package outline unit a outline references version european projection issue date iec jedec eiaj mm 5. Part 8 showed how to use a pnp transistor allowing the load to be at ground potential, as is sometimes necessary. Product overview type number1 package npn complement nxp jeita jedec bc6402 sot54 sc43a to92 bc639 bcp53 sot223 sc73 bcp56 bcx53 sot89 sc62 to243 bcx56 1 valid for all available sele. Identifying the terminals of a transistor requires the pin diagram of a particular bjt part. Pnp switching transistor 2n4036 features high current max. When you increase voltage to the base of a pnp transistor, the transistor is turned off more and more until it no longer conducts and completely shuts off. Pinning marking pin description 1 base 2 emitter 3 collector type number marking code bsr12 b5p fig. Let us consider the two examples of pnp transistors 2n3906 and pn2907a, shown in the images above. In this tutorial we will talk about the pnp transistors.
The problem is that the emitterbase junction is always forward biased. This article will show how to connect a pnp transistor in a circuit for switching or for amplification. Transistor specifications explained electronics notes. No licence is granted for the use of it other than for information purposes. So, basically in this type of transistor two ptype positive materials dope a single ntype positive material and the pnp configuration is established, and it is referred to as a pnp transistor. The datasheet says that the gain of the transistor can be as low as 15. There are two types of bjt npn and pnp transistors. This section covers the use of pnp transistors to perform high side switching with a microcontroller.
Mje5850 switchmode series pnp silicon power transistors. Features, specifications, alternative product, product training modules, and datasheets are all available. Check out the datasheet, see if you recognize any familiar characteristics. Pnp transistors toshiba semiconductor and storage pnp. The base is very thin, and most of the holes cross the reversebiased basecollector junction to the collector. Pnp power transistor tip42c disclaimer this data sheet and its contents the information belong to the premier farnell group the group or are licensed to it. Pnp transistors on semiconductor pnp online catalog. A pnp transistor is just like an npn in terms of function, what it accomplishes in a circuit. It is the maximum collector base voltage again it is generally measured with the emitter left open circuit. The arrows in the npn and pnp transistor symbols indicate the pn junction between the base and emitter. For this to happen we need to know the maximum load current for the device to be turned on and the minimum hfe of the transistor. Transistor 2sa1034, 2sa1035 silicon pnp epitaxial planer type for lowfrequency and lownoise amplification unit.
Pin io function 1 clm i detects the overcurrent state in switching transistor. The most commonly used transistor switch is the pnp variety shown in figure 1. Pinning pin description 1 emitter 2 base 3 collector, connected to case. Description pnp switching transistor in a sot23 plastic package. Using pnp transistors to switch higher voltage loads. Pnp switching silicon transistor qualified per milprf19500290 devices qualified level 2n2904 2n2904a 2n2904al 2n2905 2n2905a 2n2905al jan jantx jantxv jans maximum ratings ratings symbol 2n2904 2n2905 2n2904a, l 2n2905a, l unit collector emitter voltage v ceo 40 60 vdc collector base voltage v cbo 60 vdc. Sep 07, 2012 still, for switching loads which draw up to a few hundred milliamps, this circuit using just a pnp transistor and a resistor is really quite practical. See more ideas about electronics basics, circuit diagram and arduino. Description pnp switching transistor in a to18 metal package.
Insert a resistor with a low resistance between this pin and vcc to detect. Basic semiconductor physics, diodes, the nonlinear diode model, load line analysis, large signal diode models, offset diode model, transistors, large signal bjt model, load line analysis, small signal model and transistor amplification. The difference between a pnp transistor and a npn transistor is their polarity and their actions are reversed pnp transistor. This gives the lowest collect emitter voltage and reduces the power in the transistor. Still, for switching loads which draw up to a few hundred milliamps, this circuit using just a pnp transistor and a resistor is really quite practical. When to use npn transistors, and when to use pnp transistors for switching i want to be able to use a transistor to turn on and off a light, such that writing digitalwritepin, high will allow current to flow through the light, and digitalwritepin, low will stop the flow of current and turn the light off again. Three modes of operating region of transistors are.
And also this circuit connected with the resistors of r b 200k. The stx93003 is expressly designed for a new solution to be used in compact fluorescent lamps, where it is coupled with the stx83003, its complementary npn. In pnp transistor, pnp stands for positivenegativepositive configuration. High voltage fastswitching pnp power transistor stmicroelectronics. Working of transistor as a switch npn and pnp transistors. Zxtp25140bfh 140v, sot23, pnp medium power transistor datasheet keywords. Pnp transistor is the types of bipolar junction transistor. Q101 qualified and ppap capable s prefix for automotive and other applications requiring unique site and control change requirements these devices are pb. Diodes and transistors pdf 28p this note covers the following topics. Zetex zxtp25140bfh 140v, sot23, pnp medium power transistor datasheet dcdc conversion high power dissipation sot23 package high peak current low saturation voltage 180v forward blocking voltage created date. The secret to making a transistor switch work properly is to get the transistor in a saturation state. The easiest way to switch a higher power load than a microcontroller can handle is to use an npn transistor as explained in part 7.
Pnp switching silicon transistor datasheet catalog. Pnp switching transistor in a sot23 plastic package. Often in switching designs saturation is used instead of hfe. This is the basic electronic component that uses vastly in the making of electronic circuit. The difference this time is that we are switching power with a pnp transistor sourcing current instead of switching ground with an npn transistor sinking current.
Pnp transistor circuit characteristics, working, applications. Transistor mounted on an fr4 printedcircuit board, singlesided copper, tinplated, standard footprint. Discrete semiconductors data sheet book, halfpage m3d187 pmst3906 pnp switching transistor 1999 apr 22 product specification supersedes data of 1997 may 27 fphilips semiconductors product specification pnp switching transistor pmst3906 features pinning. To calculate your base resistor use ohms law to see that the resistance is the voltage drop divided by your base resistance roughly or 36 ohms. The 2n3904 is a really common transistor that we use all the time and the 2n3906 is its pnp sibling. Pmst3906 datasheet, equivalent, cross reference search. Unipolar transistors, such as fieldeffect transistors, use only one kind of charge carrier. I have not worked with transistor much, and therefore need some guidance in deriving the base resistor and pullup resistor values. Pinning pin description 1 emitter 2 base 3 collector, connected to case fig. Part 7 covered using transistors to switch loads that require higher currents or voltages than the microcontroller can handle. Transistor is the very important components in electronics system. For information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specifications. Pnp switching transistor in a sot23 to236ab small surfacemounted device smd plastic package. Pnp transistor 12a02chtle switching reed relay edr201a05.
Consider a pnp transistor, which is connected in the circuit with the supply voltages v b 1. Like any transistor, a pnp provides amplification andor switching capabilities to turn a load on or off connected to it. Pnp and npn transistors difference random nerd tutorials. Silicon pnp switching transistors stmicroelectronics. Many designs dont reverse bias the base emitter junction to turn the transistor off. In active region, the transistor operate as an amplifierthe junction baseemitter is forward biased. D suitable for af driver stages and low power output stages.
As per the bc857c datasheet, the minimum current gain is 420, vbesat is 700mv, and vcesatmax is 300mv. In this switching, base current flows when the base voltage is more negative. Pnp transistor tutorial the bipolar pnp transistor. Symbol parameter conditions value unit rth ja thermal resistance from junction to ambient note 1 250 kw.
Electronics basics electronics projects dc circuit nikola tesla electrical engineering arduino technology digital solar. Pnp transistor switching circuit the equations for calculating the base resistance, collector current and voltages are exactly the same as for the previous npn transistor switch. A bipolar junction transistor bipolar transistor or bjt is a type of transistor that uses both electrons and holes as charge carriers. Mmbt4403m3t5g pnp switching transistor on semiconductor. Active regionsaturation regioncutoff region1 active region characteristics. Bc558 silicon pnp transistor audio amplifier, switch.
Applications highspeed, saturated switching applications for industrial service in thick and thinfilm circuits. Transistor is made by using of 2 pn junction diode. For the pnp transistor, the base terminal is always negatively biased with respect to the emitter. Bc640 datasheet, equivalent, cross reference search. Silicon offers good overall performance with a base emitter junction turn on voltage of around 0. In saturation region, the transistor operates as an closed switch. Pnp transistor works same as npn for a switching operation, but the current flows from the base. Linear and switching industrial equipment description the 2n6111 is an epitaxialbase pnp silicon transistor in jedec to220 plastic package. I am trying to use a 2n3906 pnp transistor to switch the 24 volt pneumatic valve solenoid on and off.
Pnp switching transistor 2n3906 package outline unit a outline references version european projection issue date iec jedec jeita mm 5. I have a common ground for the stamp, demultiplexer, and pneumatic valve. Pdf an8377n an8377n 100kw mn6622 transistor ic equivalent book. That means you need 10 15 ib or 667ma in your base to know that you will drive the transistor at all times. Pnp highside transistor switching with microcontroller. Low current maximum100 ma low voltage maximum 65 v applications. There is a temptation to think that we could do the same trick with an pnp transistor as shown in figure 1b. A pnp transistor conducts from collector to emitter. Applications highspeed, saturated switching applications for. Sot89 pnp silicon power switching transistor isssue 1 december 1998 features 2w power dissipation 6a peak pulse current excellent h fe characteristics up to 6amps extremely low saturation voltage e. Pnp switching transistor pmss3906 ordering information limiting values in accordance with the absolute maximum rating system iec 604. Zxtp25060bfh 60v pnp medium power transistor in sot23 sot23 bvceo 60v breakdown voltage 100v forward blocking voltage ic 3a continuous collector current, icm 9a peak pulse current, low saturation voltage, vcesat.
Low voltage fastswitching pnp power bipolar transistor. Plate 9 illustrates how to connect a pnp transistor to an arduino or similar microcontroller. This type of switching is used for negative ground configurations. Pinning bcv65 npnpnp generalpurpose transistor rev. Pnp switching transistor 2n3906 thermal characteristics note 1. I have the following circuit and i want to calculate base resistor r1, and the r2 resistor, which i am using to pull up the pnp base to 3. Pnp transistors can also be used as switching devices and an example of a pnp transistor switch is shown below. Low voltage fast switching pnp power bipolar transistor author. Generally, the pnp transistor can replace npn transistors in most electronic circuits, the only difference is the polarities of the voltages, and the directions of the current flow. Mbt35200mt1 high current surface mount pnp silicon. Mainly transistors are used for the switching purpose. In this circuit, a transistor essentially equivalent to, low power, and a builtin overcurrent protection circuit to protect the switching transistor from, equivalent circuits pin no. Zxtp25140bfh 140v, sot23, pnp medium power transistor datasheet. A bipolar transistor allows a small current injected at one of its terminals to control a much larger current flowing between two other terminals, making the device.
Description pnp switching transistor in a to39 metal package. Mbt35200mt1 high current surface mount pnp silicon switching transistor for load management in portable applications features aec. If you have any questions related to the data sheet, please contact our nearest sales office via email or telephone details via. Pinning marking pin description 1 base 2 emitter 3 collector type.
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