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Hello, I am using the DRV8432 in my design, and I am getting a lot of ringing on the output at the solenoids, and motors that I am controlling. I have followed the recommended design that was given by TI, and I am curious to see if you have experienced this before. On the eval board there are inductors on the outputs of the driver. Can you tell me what they are used for? It seems that when I remove those inductors I still get some ringing, but it is much less. Below is a schematic of the circuit and the output of the driver at the load.
In reply to Rick Duncan:
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In reply to sai77:
Rick DuncanMotor Applications Team
We're having the same ringing issue in our design. We added the inductors at the outputs as short circuit protection, but due to the large ringing our motor current measurements show large spikes. When we tested our boards after removing the inductors, the ringing peak to peak voltage reduced from 57V to 36V. Per your response to Robert, the inductors are not required if the outputs not running in parallel mode. We're considering to remove the inductors from our boards since we're running two motors in dual full bridge mode. Could you please let me know if it would be OK to do that without any other consequences?
In reply to Peace:
Thank you for all your help, Rick!
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