DRV8432: Use of trimmable resistor

Renan Santos Adriano

Part Number: DRV8432

Hello Team,

Good day. My Customer is working with our DRV8432, the datasheet mentions the current limit has a part to part accuracy of 20%. They are wondering if they use a trimmable resistor to tune the current limit to the desired limit (measure the current limit) at room temperature, how much variation should you expect over the chip operating temperature range? Their concern is the expected accuracy over temperature and time if any initial offset of the current limit by using a trimmable resistor.

Regards,

Renan

over 3 years ago

0 Pablo Armet over 3 years ago

TI__Mastermind 37683 points

Hi Renan,

Thank you for posting to the forum.

Let me research your question. I will reply with an answer to your question by 2/9 or earlier.

0 Pablo Armet over 3 years ago in reply to Pablo Armet

TI__Mastermind 37683 points

Hi Renan,

I checked through our characterization data and we don't have data on the over-current limit accuracy across temperature. The 20% part to part accuracy should be the typical. You also have to keep in mind the tolerance of the potentiometer resistance. The more resistance variation, the lower the accuracy.

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DRV8432: Use of trimmable resistor