TIP120 Transistor | Pinout, Circuit, Datasheet, Arduino & Motor Control STMicroelectronics

[SGeC] TIP120 NPN Power Transistor 60V-5A-65W

TIP120 Transistor Pinout

The TIP120 is a Darlington NPN power transistor widely used for switching and amplification in various electronic circuits. It features a high current gain and is commonly utilized in low to medium-power applications, such as controlling motors, LEDs, and other devices that require switching of higher currents. Below is the detailed pinout description for the TIP120 transistor.

In summary, the TIP120 transistor’s pinout consists of three essential pins: the Base, Collector, and Emitter. Understanding the function of each pin is crucial for proper circuit design and operation. With its high gain and versatile switching capabilities, the TIP120 remains a reliable choice for many electronic control systems.

Tip120 Amplifier Circuit

This circuit is an audio amplifier that uses TIP125 and TIP120 Darlington transistors, as well as the LF351 operational amplifier (Op-Amp). The audio signal first enters the circuit and is amplified by the LF351 operational amplifier. The amplified signal is then sent to the TIP125 and TIP120 Darlington transistors, which further increase the current to drive the 8-ohm speaker to produce sound. The TIP120 (NPN transistor) and TIP125 (PNP transistor) operate in complementary push-pull configuration, ensuring the circuit provides sufficient current to the speaker, making the sound louder and clearer. An LED indicator light turns on to indicate normal operation of the circuit. The R9 potentiometer allows for adjusting the volume level.

Tip120 Transistor Switching Circuit

This is a switching circuit that uses an TIP120 Darlington transistor to control the load (such as motors, relays, etc.). When there is current on the control input signal (P_10), the current flows through R17 to limit the current to the base of the TIP120. The base current controls the conduction of the TIP120.

Tip120 Vs Tip122 Difference

How Does a Tip120 Work

TIP120 is an NPN Darlington transistor, typically used to provide high current gain. In this circuit, it functions as a switch transistor. By controlling the current at the base (B), it regulates the current between the collector (C) and emitter (E).