Part Number: DRV8301
Hello -
I am designing custom hardware using a DRV8301 and InstaSPIN-FOC. In selecting the proper MOSFETs for the job (what a task!), I am torn on what is a "safe" margin on the voltage (Vds).
The motor is rated at 48V, and a fully-charged battery can easily exceed 50V. For MOSFETs, I keep reading conflicting advice. Some research leads me to wanting to use 60V MOSFETs for their lower Qg and Rds for a given price point, but other resouces lead me to believe that I really need to use at least 75V (maybe even 100V) MOSFETs to handle transients et al. I know that the answer to these types of questions is generally "it depends", but I am seeking any further thought leadership here.
I have the same general question regarding the bulk capacitor voltage ratings - and this decision also affects how much capacitance I can fit into a given axial cap size. I should probably mention here that my application will use regenerative braking as much as possible.
Any advice is much appreciated!
Best,
-asifjahmed