• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 30 subscribers
  • Views 479 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.

DRV8323: IDRIVE and VDS configuration in evm

biter terbi
Prodigy 160 points
Part Number: DRV8323

Hello my name's Pedro.
I've been working with DRV8323EVM (HW config) and I noticed this pin configuration:

As you can see the IDRIVE and VDS pins are configured with a 75k pullup and a 75k pulldown at the same time.
I don't see this configuration in the datasheet I only see these 7 possibilities:

What would the EVM configuration be?
Thank you in advance.

  • 0
    TI__Genius 13640 points

    Hi Pedro,

    Thank you for posting to the Motor drivers forum!

    I did not get the chance to get to this today, but I will be able to look into this tomorrow.

    Best,

    ~Alicia

  • +1
    TI__Genius 13640 points

    Hi Pedro,

    The pullup and pulldown on the IDRIVE and VDS pins are a voltage divider as shown below:

    which has a formula of Vout = Vin * R2/(R1+R2), so Vout for IDRIVE and VDS would be equal to 1.65V.

    Looking at table 7.5 Electrical Characteristics under Seven-Level H/W Inputs (IDRIVE, VDS), the Vout calculated would be equivalent to "Input mode 4 voltage" as highlighted above.

    Best,

    ~Alicia