![]() The emitter is connected to a positive voltage while the base is connected to the negative voltage.Similarly, a bias voltage is applied at the base terminals and a base resistor is connected to this terminal in order to limit the current flowing through this terminal.In PNP transistor, a source voltage is applied at the emitter terminal (instead of collector terminal in case of NPN transistor) and load resistor is applied that is used to resist the current in the collector terminal.Following figure shows the circuit diagram of PNP transistor.While collector is lightly doped and comes in a bigger size as compared to other two terminals and collects the number of holes.An emitter is highly doped and exhibits 100% current of the transistor while a base is lightly doped which is responsible for the transistor action and controls the number of holes in case of PNP transistor.All three terminals in the PNP transistor are different in terms of doping concentration and size. ![]() The base of the transistor is more negative than the emitter terminal.This PNP transistor is composed of two P-doped layers and one N-doped layer where N-doped layer represents the base of the transistor while other P doped layers represent emitter and collector respectively.The PNP transistor is like a combination of diodes combined back to back from cathode sides.While in case of PNP transistor major charge carriers are holes. electrons and holes, but major charge carriers are electrons in case of NPN transistors. Both NPN and PNP transistors are current controlled devices where conduction is carried out by both charge carriers i.e.The PNP transistor sinks current into its base while NPN transistor sources current through its base terminal. In case of PNP transistor, all voltage polarities and current directions will be reversed as compared to NPN transistor. This transistor comes with same characteristics as NPN transistor but there are some exceptions.Unlike NPN transistor, current flows from the emitter to collector in this PNP transistor and holes act as a majority charge carriers.It is a current controlled device also known as sinking device where it sinks current into its base terminal and current flows out of the collector.It comes with three terminals called emitter, base, and collector where small current at the base terminal is used to control large current at other terminals.The PNP transistor is a type of bipolar transistor used for amplification and switching purpose and for the designing of the complementary output stage in combination with NPN transistor.Let’s dive in and explore what is this about and how it is used for the execution of electronic projects. In this tutorial, I’ll discuss each and everything related to this PNP transistor i.e what it does, circuit diagram, applications and everything you need to know. These NPN and PNP transistors come with their own benefits based on the nature of the electronic project, however, NPN transistors always deems preferable over PNP transistors because of its quick response due to mobility of electrons while PNP transistors are not preferable for amplification and switching purpose because conduction through mobility of holes deems less useful and beneficial as compared to mobility of electrons. Main Function: Small current at one terminal is used to control large current at other terminals. two P-doped layers and one N-doped layer where an N-doped layer exists between two P-doped layers. Today, I am going to unveil the details on the Introduction to PNP Transistor which falls under the category of bipolar junction transistors and comes with three layers i.e. I have previously updated the article on NPN transistor that is used for amplification and switching purpose. I am back to give you a daily dose of valuable information so you can always stay ahead of your competitors. Our wide STPOWERproduct portfolio, combined with state-of-the art packaging and protections for high reliability and safety, helps designers find the right solutions for customized, high-efficiency applications that will last a long lifetime.Hey Friends! Hope you are doing great. Key features of our NPN and PNP transistors ( 1000 V NPN-PNP transistors. Power bipolar transistors belong to the STPOWER family. We offer both industry-standard and proprietary devices. ST's power bipolar transistors with a voltage rating up to 500 V are available with both NPN and PNP polarity.
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