question: power MOSFET with clamped inductive load ?

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cmos_ajay

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Hello,
To study the switching behavior of a power MOSFET, a clamped inductive load is often used.
Attached is a diagram showing this clamped inductive load.
Can some someone explain why we need this type of load ?
Thanks.
 

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  • clamped_inductive_load.JPG
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Idea is to apply maximum possible stress on switch (MOSFET in this case) when it is switching. Clamped inductive load provides both, rated/test voltage (clamped part of circuit) and rated/test current (inductive part of circuit) simultaneously when switch is turn on/off. if you compare with resistive load, you will not get both of these conditions.
 

Can you please explain in detail ? Thanks.
 

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