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Related Concept Videos

Characteristics of MOSFET01:17

Characteristics of MOSFET

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Metal-oxide-semiconductor field-effect Transistors, or MOSFETs, play a critical role in electronic circuits. They are primarily utilized for amplifying and switching signals.
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable...
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MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

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Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
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MOSFET01:16

MOSFET

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The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
In an n-MOSFET, the structure includes n-type source and drain...
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MOSFET: Depletion Mode01:20

MOSFET: Depletion Mode

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Depletion-mode MOSFETs represent a unique subset of MOSFET technology, functioning fundamentally differently from their enhancement-mode counterparts. Unlike enhancement MOSFETs, which require a positive gate-source voltage (Vgs) to turn on, depletion-mode MOSFETs are inherently conductive and "normally on" devices.
The primary characteristic of depletion-mode MOSFETs is their ability to conduct current between the drain and source terminals without gate bias. This inherent conductivity...
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Biasing of FET01:22

Biasing of FET

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Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
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Small-Signal Analysis of MOSFET Amplifiers01:23

Small-Signal Analysis of MOSFET Amplifiers

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In small-signal analysis, a MOSFET transistor amplifier acts as a linear amplifier when operating in its saturation region. The gate-to-source voltage (VGS) of the MOSFET is the sum of the DC biasing voltage and the small time-varying input signal. This combination sets up the operating point and modulates the drain current (ID) that flows from the drain to the source. When a small AC signal is superimposed on the DC bias voltage at the gate, the instantaneous drain current comprises three...
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Temperature-Dependent Reverse-Recovery Behavior Analysis and Circuit-Level Mitigation of Superjunction MOSFETs.

Wenrong Cui1, Peng Liao1, Yanghao Wang1

  • 1State Key Laboratory of Integrated Chips and Systems, School of Microelectronics, Fudan University, Shanghai 200433, China.

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Summary
This summary is machine-generated.

High temperatures degrade superjunction Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) due to increased carrier lifetime. Adding a capacitor improves switching reliability by suppressing reverse recovery.

Keywords:
TCADreverse recoverysuperjunction MOSFETstemperature-dependent

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Area of Science:

  • Electrical Engineering
  • Materials Science
  • Semiconductor Physics

Background:

  • Superjunction MOSFETs are crucial for high-power applications.
  • Understanding their behavior at elevated temperatures is vital for reliability.
  • Reverse-recovery characteristics significantly impact switching performance.

Purpose of the Study:

  • To investigate the temperature dependence of reverse-recovery in superjunction MOSFETs.
  • To identify the physical mechanisms behind high-temperature degradation.
  • To propose a practical method for enhancing device reliability.

Main Methods:

  • Experimental characterization of superjunction MOSFETs at varying temperatures.
  • Technology Computer-Aided Design (TCAD) simulations to model device behavior.
  • Analysis of reverse-recovery charge, current, and switching transients.

Main Results:

  • Switching failure observed at 145 °C due to severe reverse-recovery degradation.
  • Increased carrier lifetime at higher temperatures exacerbates reverse-recovery issues.
  • A parallel capacitor effectively suppresses reverse recovery and improves reliability.

Conclusions:

  • Temperature significantly affects superjunction MOSFET reverse-recovery performance.
  • Carrier lifetime is a key factor in high-temperature degradation.
  • A simple capacitor addition offers a viable strategy for improving high-temperature power electronics reliability.