DRV8889-Q1: When the motor is powered on for the first time, the current output is extremely large, resulting in very loud noise.

Annie Liu

Part Number: DRV8889-Q1

Hi Team,

When the customer uses the same configuration input to DRV8889-Q1, including SPI register configuration, VREF (35%), STEP transmission frequency configuration, etc., the first movement output of the motor will be more than 2.5 times after the software is powered on for the first time. The current causes the motor to make very loud noise. May I know what is the reason?

In the figure below, a total of five movement processes occurred. The VREF (blue line) input is the same throughout the process. The amplitude of AOUT1 for the first time is nearly twice that of the next one, but the frequency of the first, second and last time is the same.

What could cause this?

Regards,

Annie

6 months ago

0 Murugavel4637 6 months ago

TI__Mastermind 23665 points

Hi Annie,

I just replied to customer's post on this. https://e2e.ti.com/support/motor-drivers-group/motor-drivers/f/motor-drivers-forum/1338028/drv8889-q1-the-first-movement-of-the-motor-after-powering-up-the-current-output-is-particularly-high-resulting-in-a-very-loud-noise.

Please let me know which post should be active for further discussion. I'd prefer to keep the customer conversation active. Please close this post at your end if you agree. Thanks.

Regards, Murugavel

0 Annie Liu 6 months ago in reply to Murugavel4637

TI__Genius 10295 points

Hi Murugavel,

Yes, you are right. It is a duplicate question. Please close this thread.

Regards,

Annie

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DRV8889-Q1: When the motor is powered on for the first time, the current output is extremely large, resulting in very loud noise.