MJE172 Discrete Semiconductor Products

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

MJE172 Application Field and Working Principle

The MJE172 is a single bipolar junction transistor (BJT) specifically designed for switching and linear applications. It features low collector-emitter saturation voltage, low noise and low leakage current, making it ideal for applications that require low power consumption and low noise. The MJE172 is manufactured by ON Semiconductor, a leading manufacturer of semiconductor and discrete products.

Features

• Low collector-emitter saturation voltage
• Low noise
• Low leakage current
• Low power consumption

Applications

• Voltage regulators
• Switching applications
• DC motor control
• HVAC and temperature control
• LED lighting
• Audio power amplifiers

Working Principle

The MJE172 is a bipolar junction transistor (BJT) which features three pins: emitter, base, and collector. It works by controlling current flow through the transistor using a small electric current flowing between the emitter and the base. This current is amplified by the transistor so that a much larger current can pass through the collector, allowing it to control a large current in devices such as voltage regulators.

The most common type of BJT is the NPN type, where the two N-type regions (emitter and collector) are connected and the P-type region (base) is separated from the other two. When current flows through the base-emitter junction in an NPN transistor, the electrons from the emitter are attracted to the collector and holes from the collector are attracted to the emitter. This creates a current flow between the two electrodes and results in the amplification of the current.

The MJE172 can also be used in linear applications where it can be used to amplify signals in audio amplifiers or as voltage regulators. In these applications, the transistor acts as a variable resistor and its value can be adjusted by changing the current passing through the base-emitter junction. By using this technique, the transistor can be used to control an output voltage which is proportional to the input voltage.

The MJE172 is especially useful in switching applications, where it can be used to turn a device on or off. In these applications, the transistor acts as a switch, allowing current to pass through when turned on and blocking it when turned off. This makes the MJE172 ideal for controlling current in circuits that require low power consumption and low noise.

Advantages

• Easy to use
• Low power consumption
• Low noise
• Good linearity
• High frequency operation

Disadvantages

• Relatively slow switching times
• Sensitive to temperature changes
• Susceptible to device failure in harsh environmental conditions

Conclusion

The MJE172 is a single bipolar junction transistor (BJT) that is specifically designed for switching and linear applications. It features low collector-emitter saturation voltage, low noise and low leakage current, making it an ideal choice for applications that require low power consumption and low noise. It can be used in switching applications as well as linear applications such as voltage regulators, DC motor control and audio power amplifiers. The MJE172 is easy to use and offers a variety of advantages, but it is also susceptible to device failures due to its sensitivity to temperature changes and harsh environments.

The specific data is subject to PDF, and the above content is for reference