Hi -
Posting on customer behalf.
I was viewing a TI education video on understanding FET SOA curves (https://training.ti.com/understanding-mosfet-datasheets-safe-operating-area-soa). I am trying to understand how the FET SOA limits are determined for the transient pulse conditions. In that video a simplified block diagram of the tester is shown. What I am trying to understand is if these transient tests are holding Vds constant when a load pulse is applied OR is the FET switching from the applied Vds value to its saturated state. In other words is the Vds on the SOA graph x-axis a static or dynamic value during SOA testing? It would be good to see a timing diagram of Vgs, Vds, and Id to understand what is happening during the pulse test. I want to make sure my interpretations of SOA curves are not overly conservative or just plain incorrect. Can you help?
