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DRV8836: parameters affecting RDSon

Genius 15585 points
Part Number: DRV8836

Hi all

My customer has below question, to summarize:

What parameters might affect the RDSon value ?

Please comment and clarify.

Best regards



As you may know, we are using the H-Bridge IC DRV8836 in our application. 

We have performed several measurements and it might appear that the Rdson parameter depends on the drain current as shown in the table hereunder:


  • I phase à measured
  • U drop à measured (sum of voltage drops between IC supply and phase+ and between IC ground and phase-)
  • Rdson à computed (U drop / I phase) 

In the datasheet, the Rdson parameter is given depending on the IC supply:

And depending on the temperature:

Could you please tell us if some other parameters (such as the drain current) might affect the Rdson value?


  • Ue,

    The VCC voltage and ambient temperature could affect the Rds_on result. I would like to challenge your test result.

    Is the die temperature or VCC change during the test? Do you have any data to show the IC temperature or VCC during the measurement? Where do you check the U drop?

    Also, I am trying to understand why do you need to check the Rds-on at different drain current? Do you test it on an EVM or your board?

  • Wang

    Thank you for the quick reply. I will ask the customer to provide feedback himself to this post / to the forum and to continue the conversation with you.

    Best regards