DRV8881: Power dissipation which is relation to ICC(operating supply current)

Hirotaka Matsumoto

Part Number: DRV8881

Hi all

Would you mind if we ask DRV8881?

We would like to confirm the power dissipation which is relation to ICC(operating supply current).
We recognize that VCC × ICC is the power dissipation which is relation to ICC.
So, in this case, is VCC 3.3V?

Kind regards,

Hirotaka Matsumoto

over 5 years ago

0 Rick Duncan over 5 years ago

TI__Guru** 114905 points

Hi Matsumoto-san,

Can you clarify?

There is no VCC or ICC listed in DRV8881 datasheet.
Did you mean VM?

0 Hirotaka Matsumoto over 5 years ago in reply to Rick Duncan

Guru 27525 points

Rick san

Thank you for your reply!

And then, we appologize that our explanation makes you confuse.
As the background of this question, we would like to know the power dissipation of the device.

We assume that total power dissipation are follows;
1. Rds(high side + low side)× Iout^2
2. (VM-3.3V)×I3P3(LDO)
3. Dissipation of IC's supply(device operating current)

We would like to calculate "1." and "2." easily.
Therefore, we would like to know dissipation of IC's supply(device operating current)

Kind regards,

Hirotaka Matsumoto

0 Rick Duncan over 5 years ago in reply to Hirotaka Matsumoto

TI__Guru** 114905 points

Hi Matsumoto-san,

Thank you for the clarification.

Dissipation of IC's supply is VM x Ivm. Ivm is typically 8mA and max of 18mA.

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DRV8881: Power dissipation which is relation to ICC(operating supply current)