DRV8263-Q1: Current Mirror Accuracy

Muwei Zheng

Part Number: DRV8263-Q1

Hi team,

My customer is asking for how to calculate current mirror accuacy. Is it correct that accuracy = IOUT(A)* AIPROPI(uA/A) * AERR(%) when IOUT>2A?

What will be AIPROPI when IOUT<2A?

Thank you,

Muwei Zheng

21 days ago

0 Joshua Horlander Cruz 21 days ago

TI__Mastermind 26850 points

Hi Muwei,

Muwei Zheng said:
Is it correct that accuracy = IOUT(A)* AIPROPI(uA/A) * AERR(%) when IOUT>2A?

This is correct.

Muwei Zheng said:
What will be AIPROPI when IOUT<2A?

The gain will be ~202 uA/A * AERR with the error depending on IOUT

Regards,

Joshua

0 Muwei Zheng 16 days ago in reply to Joshua Horlander Cruz

TI__Intellectual 1610 points

Hi Joshua,

Thank you for your response. It seems customer is refer to the draft datasheet in Nov 2024. In the datsheet AiPROPI was specified as Iout>2A.

By the way could you confirm the reason of min 190/max 215uA/A spec was removed in the latest datasheet? Customer want to confirm the min/max value of AIROPI in all temp range.

Regards,

Muwei Zheng

0 Joshua Horlander Cruz 16 days ago in reply to Muwei Zheng

TI__Mastermind 26850 points

Hi Muwei,

Getting information on why the min and max spec was removed with the RTM version of the datasheet, this will likely take a day or two.

Muwei Zheng said:
Customer want to confirm the min/max value of AIROPI in all temp range.

I will see what data I can find on this. If I have to provide data in a format that cannot be shared publicly, I will send the information over email.

Regards,

Joshua

0 Muwei Zheng 5 days ago in reply to Joshua Horlander Cruz

TI__Intellectual 1610 points

Hi Joshua, any update here on the AIROPI min/max data above?

0 Joshua Horlander Cruz 5 days ago in reply to Muwei Zheng

TI__Mastermind 26850 points

Hi Muwei,

For the why this min and max was removed, this was done to avoid confusion with providing both an error spec and a IPROPI gain min/max. The confusion that could happen would be, would the error be applicable for the typical gain or with respect to the min and max gain?

I sent the information for the AIPORPI Gain range in an email.

Regards,

Joshua

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DRV8263-Q1: Current Mirror Accuracy