Power MOSFET Basics - Tayloredge

Power MOSFET BasicsVrej Barkhordarian, International Rectifier, El Segundo, Power MOSFET semploy semiconductorprocessing techniques that aresimilar to those of today's VLSI circuits, although the devicegeometry, voltage and currentlevels are significantly differentfrom the design used in VLSI devices. The metal oxidesemiconductor field effecttransistor ( MOSFET ) is basedon the original field-effecttransistor introduced in the70s. Figure 1 shows thedevice schematic, transfercharacteristics and devicesymbol for a MOSFET . Theinvention of the powerMOSFET was partly driven bythe limitations of bipolar powerjunction transistors (BJTs)which, until recently, was thedevice of choice in powerelectronics applications. Although it is not possible todefine absolutely the operatingboundaries of a Power device,we will loosely refer to thepower device as any devicethat can switch at least bipolar Power transistor isa current controlled device. Alarge base drive current ashigh as one-fifth of thecollector current is required tokeep the device in the , higher reverse base drivecurrents are required to obtainfast turn-off.

Power MOSFET Basics -- Vrej Barkhordarian, International Rectifier, El S egundo, Ca. Introduction to Power MOSFETs and their Applications -- F airchild Semiconductor Understanding Power MOSFETs -- Fairchild Semic ... at high breakdown voltages (>200V) the on-state voltage drop of the power MOSFET becomes higher than that of a similar size ...

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  Basics, Understanding, Power, Voltage, Mosfets, Power mosfets, Power mosfet basics, Understanding power

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