STSPIN840 Setting overcurrent values

[mnguyen1]

Is the overcurrent protection set to 3A on the STSPIN840? If so, is there a way to change the trip value of the overcurrent protection to better align with its application? I want to change it so that the overcurrent trips at 1A. Thank you!

[Peter BENSCH]

Welcome @mnguyen1, to the community!

The overcurrent protection is designed to protect the MOSFETs and has a fixed rating of typically 3A, max. 3.5A. The low-side shunts connected to SENSEA and SENSEB on each full bridge are used for the control and limiting functions.

Hope that answers your question?

Regards
/Peter

[mnguyen1]

Thank you!

 

For the overcurrent protection, what’s the tolerance of when the circuit triggers. Say I have my Vref at 1V and my RSNSA is 0.5 ohms. I’m expected to trip at 2A, but could I expect to trip at 1.9? Thank you

 

Best,

Matthew

[Peter BENSCH]

See the answer to this 2nd question in your new thread.