MC33GD3000 Power dissipation profiles

[TomLightning]

Hi,

I have a question related to the figure about the power dissipation of the MC33GD3000 shown in the datasheet:

Is it right, that the power dissipation is given in ohms or should it be given in watts?

BR

Tom

[TomasVaverka]

Hi Tom,

You are right, it should be given in watts.

Thank you for pointing that out, we will correct it in the next datasheet revision.

Best regards,

Tomas

[TomLightning]

Okay, that makes more sense. The thermal resistance from the exposed pad to the junction (internal chip structure) is give with 3°C/W acc. datasheet. Let's assume that the ground plane which is directly connected to the exposed pad has a temperature of +125°C. Is the assumption right, that my junction temperature would only increase about approx. 3°C at 1W power dissipation? I'm trying to find out if I could get a thermal problem when operating the MC33GD3000 with the battery supply.

BR

Tom