FJAF6920TU

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FJA6920TU Application Field and Working Principle

The FJA6920TU is a small signal NPN bipolar junction transistor (BJT) device that offers high performance, low noise, and high gain. Additionally, due to its high degree of production integration and reduced physical size, it is well-suited for a number of applications such as high-frequency amplifiers, active filters, audio circuits, and phase-locked loops.

Pinout

The FJA6920TU has three terminals: the base (B), emitter (E), and collector (C). The emitter terminal is internally connected to the ground, leaving two external connections: the collector (C) and the base (B).

Main Characteristics

• High Ic max (Continuous collector current): 1A
• High hFe (DC current gain): 2000
• High fT (Transition frequency): 200 MHz
• Collector-emitter voltage: 30V
• Collector-base voltage: 30V

Working Principle

The FJA6920TU is a NPN transistor. This means that it has two p-type semiconductor layers that sandwich an n-type semiconductor layer. When a small current flows through the base terminal, it causes electrons in the n-type layer to move, thus causing current to also flow from the collector to the emitter. This is known as the common-emitter configuration. As the base current increases, the collector current will increase linearly and the gain of the transistor will increase. In the linear region, increasing the base current by a certain amount will cause the collector current to increase by the same amount.

Applications

The FJA6920TU is well-suited for many high-speed amplifier or active filter applications. It can be used as an active filter or phase-locked loop in communications circuits or audio circuits. It can also be used in motion detection or sensing circuits such as burglar alarms or home security systems. Additionally, it can be used in switching applications such as automotive applications or relays. In all applications, the FJA6920TU can provide superior performance and low noise due to its high current gain and high transition frequency.

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