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ULN2003A: DC motor drive

na na78
Guru 16770 points
Part Number: ULN2003A

Hi

We consider to drive DCM with ULN2003A.

We want motor current sensing by inserting current sensing resistor at low side of ULN2003A.

I attached image.  Could you please check if it is feasible?  


e2e1.xlsx

BestRegards

  • 0
    TI__Mastermind 32650 points

    Hi User,

    These deices do not have any "loss of GND" protection so I think this could work. My only concern is that there will be a voltage offset between true GND and device GND. This could affect the drive voltages on the input pins.

    I would suggest testing this with purely resistive load first to confirm the operation.

  • 0 in reply to Shreyas Dmello
    Guru 16770 points

    Hi Shreyas 

    Thank you for your reply.

    >These deices do not have any "loss of GND" protection so I think this could work.

    I understood that you could judge this ULN2003A configuration can work basically.  Is it right?

    Could you explain loss of GND protection?   I'm sorry for your inconvenience.

    BestRegards

  • 0 in reply to na na78
    TI__Mastermind 32650 points

    Hi User,

    This is a feature in other devices(not on any TI low side switch) where the device senses a rise on the voltage on the GND rail and the and the device shuts down. This is not a concern here.

    I think the application can work.