DRV8837C: Multiple DRV8837C and Capacitors

Dharmesh Joshi

Part Number: DRV8837C

I have multiple DRV8837C on a PCB. I am using about 8, all of them use the same 3.3V and 6V power source. This is shown below.

Each DRV8837C has its own 0.1uF cap for both power rails.

Is it possible, the amount capacitors used can be reduced?

We will be using only one DRV8837C at a time.

Regards

over 4 years ago

0 Ryan Kehr over 4 years ago

TI__Guru 55565 points

DJ,

Each IC requires a local ceramic decoupling capacitor placed as close to each power pin on each device. These should not be removed.

It is also recommended to have a larger bulk capacitor that can be a large ceramic or electrolytic. This larger bulk can be shared across devices especially since you are only operating one at a time.

0 Dharmesh Joshi over 4 years ago in reply to Ryan Kehr

Expert 1855 points

Thanks

I will keep the caps as they are.

Is there any circuit reference in regards to the bulk caps you have mentioned?

0 Ryan Kehr over 4 years ago in reply to Dharmesh Joshi

TI__Guru 55565 points

Please see section 9.1 in the datasheet.

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DRV8837C: Multiple DRV8837C and Capacitors