DRV8323: DRV8323 current detection problem

Annie Liu

Part Number: DRV8323

Hi Team,

When the customer uses drv8323 to detect the AB two-phase current of PMSM, the SOB output is normally 1.5v, but the SOA output is 3.3v, which are directly connected to the adc of stm32. Customer would like to know what is the reason?

The schematic diagram is as follows

Thanks,

Annie

over 4 years ago

0 Adam Sidelsky over 4 years ago

TI__Guru 63420 points

Annie,

Does the customer see this on more than one device?

Have they checked using a scope if the ADC pin is disconnected?

Regards,

-Adma

0 Annie Liu over 4 years ago in reply to Adam Sidelsky

TI__Genius 10295 points

Hi Adma,

Customer provided the feedback just now.

A few chips have this problem.

He has checked with an oscilloscope, the hardware circuit is normal.

Thanks,

Annie

0 Adam Sidelsky over 4 years ago in reply to Annie Liu

TI__Guru 63420 points

Annie,

Please check register 0x06 when the problem occurs and show us the stored values.

Regards,

-Adan

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DRV8323: DRV8323 current detection problem