PUMB3,115 Discrete Semiconductor Products

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Transistors - BJT - Arrays, Pre-Biased

The PUMB3,115 is a pre-biased, four input, bipolar Darlington array made by Toshiba. The Darlington array comprises NPN transistors which are joined in series to act as an amplifier. The array of four transistors allow an input voltage to be amplified with a gain up to 1000.

Application fields of PUMB3,115

The PUMB3,115 is mostly used in amplifier applications. It can be used as a low impedance, high gain amplifier for medium to high power applications. This could include audio applications such as speakers, microphone pre-amplifiers, and mixers. It can also be used for motor control, voltage regulators, and other power circuit applications.

Working Principle of the PUMB3,115

The NPN transistors in the PUMB3,115 are used to amplify an input voltage. The transistor base is connected to the input voltage, and the emitter is connected to the output voltage. The transistor collectors are connected to one another, forming a common collector connection, called Darlington connection. This arrangement allows a greater gain and larger output voltage than with a single transistor arrangement.

The PUMB3,115 can be connected to one another using external resistors to increase the number of inputs and output gain.

Conclusion

The PUMB3,115 is a pre-biased, four input, bipolar Darlington array which is used for a variety of applications. It has a high gain and low impedance making it suitable for applications such as audio processing, motor control, voltage regulators and other power circuit applications. It also can be daisy chained using external resistors to increase the number of inputs and output gain.

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