DRV8818: About capacitor for VGD.

Kengo.Y

Guru 10385 points

Part Number: DRV8818

Hi team.

Thank you for your support.

I have a question about VGD pin of DRV8818.

I want to change capacitor at VGD pin(0.22uF ceramic capacitor.) because it is difficult to obtain.

I understood recommended value range for capacitor, from bellow E2E.

https://e2e.ti.com/support/motor-drivers/f/38/t/716344?tisearch=e2e-sitesearch&keymatch=DRV8818%20vgd

Could you tell me the role of this capacitor ?

I think it is used as bypass capacitor for noise removal.

If it is so, what kind of noise are you concerned?

Sincerely.

Kengo.

over 5 years ago

0 Rick Duncan over 5 years ago

TI__Guru** 114905 points

Hi Kengo,

We are aware of capacitor shortages also.

Please let us know what values you can easily obtain. We can discuss the values with the design team.

Thank you.

0 Kengo.Y over 5 years ago in reply to Rick Duncan

Guru 10385 points

Hi Rick-san

Thank you for your quick reply and understood our situation.

I want to use 0.1uF(0201) *1pcs , actually I really want to no mount.
I'll wait for your consideration.

Sincerely.
Kengo.

0 Rick Duncan over 5 years ago in reply to Kengo.Y

TI__Guru** 114905 points

Hi Kengo,

There are no issues with a 0.1uF (0201) * 1pcs.

0 Kengo.Y over 5 years ago in reply to Rick Duncan

Guru 10385 points

Hi Rick.

Thank you for your answer.
I'll change capacitor to a 0.1uF(0201)*1pcs.

Could you please confirm how do you use this capacitor?
And then, when this capacitor is no mount at VGDpin, what happen is this device.

Sincerely.
Kengo.

0 Kengo.Y over 5 years ago in reply to Kengo.Y

Guru 10385 points

Hi Rick.

How about my question.
I'll wait for your kindly reply.

Thanks.
Kengo.

0 Rick Duncan over 5 years ago in reply to Kengo.Y

TI__Guru** 114905 points

Hi Kengo.,

I tried to send a private message yesterday. Did you receive the message?

0 Kengo.Y over 5 years ago in reply to Rick Duncan

Guru 10385 points

Hi RIck.

I didn't receive your private message.
Could you send me again,please.

Sincerely.
Kengo.

0 Rick Duncan over 5 years ago in reply to Kengo.Y

TI__Guru** 114905 points

Hi Kengo.,

Trying again. The initial message is a friendship request.

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DRV8818: About capacitor for VGD.