Understanding Modern Power MOSFETs - Fairchild Semiconductor
Understanding Modern Power MOSFETs - Fairchild Semiconductor
Understanding Modern Power MOSFETs - Fairchild Semiconductor
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15<br />
16<br />
FDD16AN080AN Peak Current<br />
Rating<br />
Peak Current Capability<br />
Conduction Losses<br />
• When a MOSFET is in the ON state, it<br />
behaves like a resistor<br />
• The resistance between the drain and the<br />
source is R DS(ON)<br />
• So the power dissipation is<br />
I 2<br />
load x RDS(ON)<br />
• For a given device, RDS(ON) • Increases with temperature<br />
• Decreases with VGS • Slightly increases with current<br />
I load<br />
V g =10V<br />
V dc<br />
Load<br />
resistor<br />
8
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