Understanding FET Maximum Ratings: DC vs Pulsed Drain Current

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The discussion clarifies the difference between DC and pulsed drain current ratings in FET datasheets. DC current ratings are lower due to continuous operation, while pulsed ratings can be higher due to reduced duty cycles. However, average power or current from pulsed operation cannot be equated to DC ratings due to potential limitations like wire bonding and temperature spikes. Understanding these parameters is crucial for safe and effective design. Proper consideration of these factors ensures reliable FET performance in applications.
Physicslearner500039
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Hi All,

i have seen the following parameter in FET data sheet in the maximum ratings column
DC drain current, Pulsed. What does this parameter represent? In my design how should I take care of this? Could someone please explain me this?

Thanks in advance,

Regards,
Satya
 
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It is power rating. DC current rating is a lot lower because it is continuous. Pulse current is higher because the duty cycle is much lower.

But you cannot count on the average power or the average current from the pulse can be the same as DC power. Because there might be limitation of the wire bonding, instantaneous temperature spike or other factors inside the FET.
 
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