DRV3201-Q1 Case of not using internal Shift Buffer

Shimizu,

I've assigned your question to an engineer. Due to the high volume of posts about this device there will be a delay in response. Thank you for your patience.

No you can't connect RI to GND. RO is internally connected to 2nd stage amp therefore it can't be left open.please ask customer feed the external refeerence to RI. Also this is already well described in the datasheet "Current sense application circuit"

Thanks

Hi Tanaka-san

Thank you for your support.
I'm sorry. There was little information sent by me.

User doesn't use 2nd stage amp too.
User uses only 1st stage amp.
and REF voltage is supplied from another amp.

I send image by attached file.

Then, User do the follwoing setting.
Is the following setting possible?

- RO-pin -> Open
- O3,O4-pin -> Open
- RI -> GND

Best regards,
Shimizu

Hi Tanaka-san

   Thank you for your support.

   When can you give me a reply?

Best regards

Shimizu  

Please review the current sense diagram in the datasheet.

RO is internally connected and cannot separte from the current sense amp.

If you are not using, please tie the input to specified voltage.

Hi Tanaka-san

Thank you for your support.
I chacked the current sense diagram in the datasheet.
But I think that RO is not connected to 1st amp.
I suggest my image by the attached file.

Best regards
Shimizu

Hi Tanaka-san

  Thank you for your support.

  I will ask my customer to input 0.1V~2.6V to RI, and to open RO.

Best regards,

Shimizu