Power MOSFETs (Metal-Oxide Semiconductor Field Effect Transistors) are three-terminal silicon devices that act as power switches in power management applications, capable of handling from a few hundred milliamperes to tens of amperes. MOSFETs for power management applications have maximum voltage ratings of 10V to 1500V. Power ratings under 30V are used as power switches in portable electronic equipment, such as laptops, PC's, cell phones, and PDAs. These lower voltage devices may have one or two MOSFETs in a package. Medium power ratings (30 to 100V) are used in industrial and automotive applications. Higher power ratings (over 100V) devices are used in power supplies, telecommunications, motor control and other industrial applications. Where space is at a premium, they are available in small outline packages. For industrial power applications, they are available in through-hole and surface mountable packages.
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(MOSFET), drawing current through the flyback transformer’s primary. When the transistor... a signal to the gate of the MOSFET in Figure 1 , based on feedback circuitry from the load. In pulse
- Nov 03, 2009
- Take Simple Steps Toward Extreme Low-Power Design
is a P-channel MOSFET. We desire a very low drain-source resistance (RDS), and we often find these in P-channel MOSFETs. One challenge this type of MOSFET offers, though, is that the gate voltage must... the digital output is at a low (ground). It’s expected that the load controlled by the MOSFET is only