12/6/2023 0 Comments Transistor 2n3904![]() ![]() It is usually used in two-stage voltage boosters or buffer circuits where they are connected in series. Used as a switching regulator: this type of transistor can be used as a switching regulator. This is a simple circuit and it can be easily constructed by connecting the input to the base of the 2N3904 NPN transistor and its collector to the output. Used as a control amplifier: 2N3904 NPN transistor is used as an amplifier in the form of an emitter follower. How is this possible? One unique feature about this transistor is low saturation voltage and this is the main reason it can easily operate as a power switch without any impediments. Used as a control switch: 2N3904 NPN transistor is used as a switch where it controls heavy loads. ![]() Now let’s look at the real-world applications of this transistor: Emitter current: this refers to the current that flows from the emitter to the base. It is usually 200mA in an NPN transistor. Collector current: this refers to the current that flows from the collector to the base. E-B voltage: this refers to the voltage between the emitter and base. C-B voltage: this refers to the voltage between the collector and the base. This refers to the voltage between the collector and emitter. Here is a sample of the 2N3904 NPN transistor ratings: If you use a low-rated transistor on a demanding circuit, chances are it will blow out. If your circuit has a high power demand, then you will go for the transistor with high power ratings. Usually, the ratings of a transistor that you buy will depend on its circuit requirements. Their performance and relevance are determined by these ratings. It is imperative to know that 2N3904 NPN transistors have power ratings. This arrow indicates that following this arrow in a clockwise direction from its base terminal leads us towards its emitter. For example, if there is a small voltage applied to the base terminal and if there is no voltage applied to the emitter or collector then, the current will flow from emitter to collector and this current will be proportional to the voltage applied at the base terminal.Īlso, it should be noted that in most cases, this transistor has an arrow on its top surface pointing towards its emitter. The arrow symbol on each pin represents the direction of the current flow. It is important to note that in most cases, the emitter is labeled as “E”, while the collector is labeled as “C”. The base terminal is represented by pin 1 and the other two terminals are represented by pin 2 and 3 respectively. This means that the terminals are designed to form pin-like structures where each pin represents a respective terminal. This transistor is characterized by a pinout structure. But, how are these terminals arranged and organized in a transistor system? Design and structure of 2N3904 NPN transistorĪs we have already mentioned, the 2N3904 NPN transistor comprises three terminals-base, emitter, and collector. ![]() Just like other NPN transistors, this one also has an emitter, base, and collector terminal. This configuration makes it possible for current to flow through this device from emitter to collector when there is a small voltage applied to its base terminal. The silicon material provides the P-type semiconductor while the copper provides the N-type semiconductor. The 2N3904 transistor is made of silicon and copper. It can be used for amplifying signals, acting as a switch, and even rectifying AC signals. The first thing to note is that this transistor is a general purpose NPN transistor. Now that you know what an NPN transistor is all about, let’s proceed to what matters. This property makes this kind of transistor an active device because it amplifies small signals into bigger ones. When a small voltage is applied to it, there will be no flow of current from emitter to collector when a large voltage is applied, there will be a large flow of current between emitter and collector. ![]() The base terminal controls whether current can flow from emitter to collector or not. The emitter terminal is where the current enters the base terminal and flows out through it to the other end of the emitter terminal. The collector terminal of an NPN transistor is where the current enters and flows out from the other end of the collector terminal. The transistor has three terminals, namely, collector, base, and emitter. NPN means that the PN junction is biased so that the N-type material is more conductive than the P-type material. Where to buy the 2N3904 NPN transistor?įirst things first, let’s understand the basics of an NPN transistor.Features and benefits of 2N3904 NPN transistor.Design and structure of 2N3904 NPN transistor. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |