![]() The 2n2907 pin configuration/pin description is explained below. It contains Emitter, Base, and Collector as terminals or leads or pins. The 2n2907 transistor is a 3-pin Or 3-terminal device. Since, the NPN and PNP transistors working similarly, except that the polarities of the voltage and direction of the current are reverse in the PNP transistor when compared to the NPN transistor. So, that the polarity of the collector terminal is negative to the base terminal. The collector to base junction gets reverse biased. In the conducting state of the transistor, the polarity of the base terminal is negative regarding the emitter terminal. It is also referred to as a current-controlled device because the minimum current at the base terminal controls the maximum current at the emitter and collector terminals. While the P-side represents the emitter terminal and its polarity is positive. The N-side represents the base terminal and its polarity is negative. As this is a PNP transistor, the N-type layer is present in between the two P-type materials. If you are using a PCB, then you should also check the package type of the transistor.It is made up of semiconductor material. So these are some basic parameters to select the right transistor for your application. The power dissipation across the device can be calculated by multiplying the collector current to the voltage across the device itself. For small transistors, the power rating is on the order of a few hundred milliwatts, but for high power transistors, it is defined in watts. Power dissipation varies by a transistor to a transistor. ![]() It is the total power dissipated by the transistor. You can use a resistor to limit the collector current. Collector current should not exceed its maximum value otherwise, it can damage the transistor. It is generally defined in milliamps, but for high power transistors, it is defined in amps. V CBO is relatively higher than V CEO because the collector to base voltage is often higher than the collector to emitter voltage.Ĭollector current is the maximum current that can flow through the collector. V CBO is the maximum voltage that can be applied across the collector-base junction, and it is measured with the emitter open circuit. Maximum V EBO is usually 6V or more for most of the transistors and measured with the collector open circuit. V EBO is relatively smaller than the V CEO. Higher voltage than the V EBO can damage or destroy your transistor. V EBO is the maximum voltage that can be applied across the emitter-base junction. So before using the transistor, check the maximum V CEO from the datasheet. Applying a higher voltage than V CEO can damage your transistor. For most of the transistors, V CEO is usually 30V or more and measured with the base open circuit. V CEO is the maximum voltage that the collector-emitter junction of a transistor can handle. If you want to use the transistor as an amplifier, then choose a transistor with higher current gain. Current is the ratio of the base current to the collector current and a measure of the amplifying ability of the transistor. Current gain is usually referred to as a β or h fe. In any circuit, the current gain of a transistor is an important parameter. If you are building a circuit from the internet, then it can be directly chosen using the type number of transistors used in the original circuit. JIS is used by Japanese Industrial Standard, Pro Electron is a European standard, and JEDEC is an American standard. There are three main numbering systems, i.e. By using the type number of a transistor, we can search for its specifications and features. The type number of a transistor is a unique number given to every transistor. So below are some of the important parameters to keep in mind while selecting a transistor. So it is a challenging task to choose the right transistor for your circuit. ![]() Transistors are more complicated than resistors and capacitors because you can choose a resistor or capacitor according to required resistance or capacitance value but while choosing a transistor, you have to look for many transistor parameters. There are thousands of different types of transistors available, and each transistor has different parameters. Out of these three terminals, input voltage or current is applied to one pair of the transistor's terminals, and controlled output voltage/current can be obtained through another pair of terminals. A Transistor is a three-terminal semiconductor device that is used as an amplifier or a switch in electronics circuits.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |