JANTX2N2221AL

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Introduction

The JANTX2N2221AL transistor is a bipolar junction transistor (BJT) designed for use in low-power applications including power management, small signal audio processing, analog switching and high frequency switching. It is a single-unipolar NPN transistor with a base-collector voltage of 40V and a hFE range of 40–100. This transistor is fabricated using a process that combines low voltage and low-resistance characteristics to deliver superior performance in low voltage switching applications.

Design and Performance Characteristics

The JANTX2N2221AL is composed of a single NPN transistor with an integrated pre-bias construction that allows it to be used in a wide range of switching and amplification applications. The transistor features a maximum output power of 2.0W, a collector-emitter saturation voltage of 0.7V, a noise level of less than 20nV/Hz at 20 kHz, and a maximum collector current (IC) of 500mA with a minimum beta of 40. It also features a storage temperature of -65º to 125ºC and a collector-emitter voltage of 40V.

Application Fields

The JANTX2N2221AL transistor is suitable for use in low-power applications such as audio amplifiers, switch-mode power supplies, low voltage battery powered devices, and applications that require high frequency switching. It is well suited for use as an analog switch in filter applications such as bandpass, lowpass and highpass filter circuits. It is also useful for low-noise circuits requiring high speed operation.

Working Principle

The JANTX2N2221AL transistor works on the basic principle of a BJT. When a small voltage is applied to the base, a current passes through the base-collector junction, allowing the transistor to amplify current. The voltage applied to the base (Vbe) determines the collector-emitter current (Ic). When the collector-emitter voltage (Vce) is zero, the transistor is considered to be in active mode, and the current flows from the collector to the emitter. When the collector-emitter voltage is positive, the transistor is in the cutoff mode and no current flows.

Conclusion

The JANTX2N2221AL transistor is a single-unipolar NPN transistor designed for low-power applications. It is ideal for use in small signal audio processing, analog switching, and high frequency switching. It features a maximum output power of 2.0W, a collector-emitter saturation voltage of 0.7V, and a collector current of 500mA. The JANTX2N2221AL transistor’s pre-bias construction allows it to be used in a wide range of applications. It works on the principle of a BJT, wherein a small voltage applied to the base makes current flow from the collector to the emitter.

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