DMMT5401-7 Datasheet/PDFThe DMMT5401-7 application field and working principle is an important topic under the category of transistors – Bipolar (BJT) - Arrays. The part is well suited for high voltage, low power switching and amplification applications, and also allows for bidirectional control of current flows. It offers excellent specifications in terms of power, frequency range and rated temperature operating range.
DMMT5401-7 is a step-forward version of the original DMMT5401 series introduced in the late 1980s. It has the same package outline but with higher breakdown voltage and improved switching speed. It is a Darlington-configured dual NPN transistor array that provides two types of output stages.
The first stage is a power amplifier configuration, with its output stage designed specifically for low-power signal amplification. It operates at a frequency range of up to 1 GHz, and its output impedance can be adjusted up to 1kOhm. It has an input impedance of 1MOhm and can be used with a variety of signal sources, including RF, microwave and other low-power digital signal sources.
The second stage of the DMMT5401-7 is a low power switching circuit with an on/off current capability of up to 10A and a minimum off-state voltage of 80Vpk. It can be used to switch multi-mode power supplies, such as those commonly used in telecommunications equipment. It also offers excellent protection against transients, and its switching frequency can be adjusted up to 6GHz.
The working principle of the DMMT5401-7 is built on the classic Darlington transistor configuration. As with most transistors, it is based on a three-terminal junction that is composed of an N-type (drain) and P-type (source) diffusion region, and an anode. In the DMMT5401-7, this three-terminal junction is further configured to form two Darlington Transistors that are connected in series. The output of the two Darlington transistors is then delivered to the output terminal.
In operation, when a voltage is applied between the gate and the source, the two transistors become activated, and current starts to flow between the source and the drain. This current flow is called “Forward Bias”, and it is the same principle used to create controlled current in other types of transistors. In the DMMT5401-7, this increased current flow also causes an increase in the voltage drop across the two transistors, which leads to an increase in the output voltage.
The current gain of the DMMT5401-7 is adjustable, making it a versatile solution for most switching applications. It can handle higher wattages and greater current flows than other Darlington configurations, yet it can also be used in low-power applications where the current needs to be controlled precisely. With its adjustable gain and current capacity, the DMMT5401-7 is an ideal choice for a wide range of switching and amplification tasks.
Overall, the DMMT5401-7 is an excellent transistor array for low-power amplification and switching applications. It is a high-performance, low-power device that can handle a wide range of frequencies, power outputs and current flows. Its versatility and ease of use make it an excellent choice for a wide variety of applications.