• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 30 subscribers
  • Views 140 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

DRV8300: Can GVDD be 5V and still work reliably?

DRV8300: GVDD =5V, VbootD = 0.7V typ

Hideki Hayashi1
Expert 8420 points
Part Number: DRV8300

Tool/software:

Hi team,

Similar to the quoted question, customer wants to use 5V as GVDD.

But the internal bootstrap diodes is about 0.7V drop, though Vbstuv is 4.8V max. Is it true to use 5V as GVDD OK?

This is not same question with the original thread because the past question discuss about transient. This is stable situation.

Regards,

Hayashi

  • 0
    TI__Expert 8420 points

    Hi team,

    Anybody respond?

    Regards,

    Hayashi

  • +1 in reply to Hideki Hayashi1
    TI__Expert 4785 points

    Hi Hiyashi,

    I'm sorry for the delay.

    I would not use GVDD at 5V. I would use 10-12V for GVDD if possible.

    As you mentioned, VBSTuv is a concern when using such a low GVDD voltage. Based on the equation section 9.2.2 in the datasheet, you would be getting VBSTuv faults if you used 5V GVDD due to the drop across VbootD.

    I agree this can be kind of misleading, while the device "operates" at 5V GVDD, it will struggle or may not even be able to drive a FET at such low GVDD. Thus, I recommned using higher GVDD value such that GVDDuv and VBSTuv would not be a concern.

    Thank you,

    Joseph