DRV8353: CPUV Fault during initialization period

David Blanc

Part Number: DRV8353

Hi,

We have designed our owm DRV8353S power board to drive a 3-phase brushless motor.

I use this power board with the f28p65x ControlCARD and the Universal Control Motor Lab project.

During the initialization period (before enabling the motorVars_M1.flagEnableRunAndIdentify flag), the DRV8353S detects a CPUV fault.

I have monitored and VCP (yellow signal) - VDRAIN (bleu signal) is < 5V (violet signal):

We have two PCBAs and both of them have the same problem.

Is it possible to share our schematics and gerber to your DRV team to help us finding the problem please?

Best regards,

David

over 1 year ago

0 Joshua Maize over 1 year ago

TI__Genius 12231 points

Hi David,

Thank you for posting on our forum.

We are glad to help and If you could share the schematic files that would be helpful to get started. The first area I would examine is the capacitors relating to the Charge Pump (VCP/CPH/CPL)

And could you also provide some additional information regarding operating voltage? (VM, if not linked to VDRAIN)

Thank You and Best Regards,

-Joshua

0 David Blanc over 1 year ago in reply to Joshua Maize

Prodigy 200 points

Hi Joshua,

Thank you for you fast reply.

VM is linked to VDRAIN and equals to 48V.

I send you our schematic and gerber files by email.

Best regards,

David

0 Joshua Maize over 1 year ago in reply to David Blanc

TI__Genius 12231 points

Thanks David,

I will follow-up after review.

Best Regards,

-Joshua

Motor drivers

Motor drivers forum

DRV8353: CPUV Fault during initialization period