DRV8834 AOUT1、AOUT2、BOUT1、BOUT2 output abnormal

Jacky Chen29

Genius 4735 points

Hola,

Can someone help to advise what reasons causes below abnormal output waveform？

Abnormal waveform：

Normal waveform：

We used two different PCB vendor and they are two different output waveform, is this caused by PCB？

over 9 years ago

0 Wilson Zuo over 9 years ago

TI__Mastermind 26065 points

Hi Jacky

You mean the same layout produced by two vendor? I do think it will cause such big difference only by "quality". There must be something wrong of connection to the abnormal one. Also we can do some swap test of boards and devices to make sure it is not something of accidental factors. Then, if the problem still there, we need to go down to the schematic and layout in detail.

Best regards,

0 Jacky Chen29 over 9 years ago in reply to Wilson Zuo

Genius 4735 points

Hola Wilson,
thank you for the prompt reply and we will try it again.

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DRV8834 AOUT1、AOUT2、BOUT1、BOUT2 output abnormal