DRV8873-Q1: DRV8873SPWPRQ1 Schematic Review

CHO SR

Expert 2935 points

Part Number: DRV8873-Q1

Hi,

The customer applied DRV8873SPWPRQ1 to the new project.

Please review the schematic and give us advice.

*Delete Schematic

over 2 years ago

0 Ryan Kehr over 2 years ago

TI__Guru 54665 points

Hello,

Please give us at least 24 hours to review your schematic.

Regards,

Ryan

0 CHO SR over 2 years ago in reply to Ryan Kehr

Expert 2935 points

Hi Ryan,

We shall be waiting for you.

Thank you.

0 Ryan Kehr over 2 years ago in reply to CHO SR

TI__Guru 54665 points

Hello,

One major problem with the schematic.

DVDD (pin 1) is an internally regulated logic supply. It requires a 1uf capacitor to GND (as the schematic shows) and that is it. It can NOT be connected to an external regulator as it appears in the schematic (U4).

Also, I do not see an large, bulk decoupling capacitance on the VM line, but possibly that is on another sheet in the schematic back near where Vsup comes in.

Everything else looks OK.

Regards,

Ryan

0 CHO SR over 2 years ago in reply to Ryan Kehr

Expert 2935 points

Hi Ryan,

Thank you for your support.

1uF is applied to the schematic.

Not enough PCB space, So, can we use CE1 as a decoupling cap together?

+1 Ryan Kehr over 2 years ago in reply to CHO SR

TI__Guru 54665 points

Just to be clear. U4 is NOT required and should be removed from the schmatic. CE1 is OK.

Regards,

Ryan

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DRV8873-Q1: DRV8873SPWPRQ1 Schematic Review