What are the advantages of using superjunction MOSFETs?

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Superjunction MOSFETs have emerged as the new powerhouse in the world of power electronics. With their high voltage rating and low on-resistance, they are becoming the preferred choice for designers of motor drives, switch-mode power supplies, and electric vehicles. In this article, we delve deeper into the advantages of using superjunction MOSFETs.

Reduced Power Losses.

One of the primary benefits of using superjunction MOSFETs is their ability to minimize power losses. This is achieved through their improved channel structure, which helps to reduce on-resistance. As a result, superjunction MOSFETs generate less heat compared to conventional MOSFETs, making them ideal for applications that require high efficiency.

Higher Breakdown Voltage.

Another advantage of superjunction MOSFETs is their improved breakdown voltage. The vertical structure of these MOSFETs provides higher voltage blocking, making them suitable for high voltage applications. This enhanced capability also results in a reduction of the size of the MOSFET required to handle the same voltage.

Lower Switching Losses.

Superjunction MOSFETs possess a faster switching speed resulting from their built-in body diode. The diode significantly reduces the time required to switch on and off in a circuit. This feature minimizes the switching losses, making superjunction MOSFETs better suited for applications that require high-frequency switching.

Improved EMI Reduction.

Superjunction MOSFETs have an improved layout structure that reduces the electromagnetic interference (EMI) in a circuit. The tightly packed MOSFETs produce a lower parasitic inductance that allows the circuit to operate more efficiently. This results in a reduced noise level in the circuit, which is crucial for applications such as audio equipment, power supplies, and medical instruments.

Increased Reliability.

Superjunction MOSFETs are known to have better reliability. The improved channel structure reduces the hot-spot temperature, meaning that the MOSFETs can operate under higher temperatures without degrading. This feature enables better performance while improving the device's lifespan.

Conclusion.

Superjunction MOSFETs are rapidly becoming the go-to solution for power designers. Their enhanced capabilities enable better electrical performance and reduce power losses while enhancing the device's lifespan. When compared to traditional MOSFETs, superjunction MOSFETs are an excellent alternative that offers more efficient solutions for high voltage and high current applications.

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