[SI-LIST] Re: Derating Value of Power ICs

For a power component like a regulator, you may find on the datasheet a 
power rating
(max dissipation at a certain temperature) AND a derating value which 
reduces that
power rating by some number of Watts per degree of increased ambient 
temperature.

Of course as the ambient goes up so will the die temperature and this 
reduces the amount of
heat that can be dissipated in the silicon.
Based on thermal resistances, you could calculate the derating yourself.

----- Original Message ----- 
From: "Sandhya I. M." <sandhya.im@xxxxxxxxxxxxx>
To: "SI-LIST" <si-list@xxxxxxxxxxxxx>
Sent: Thursday, July 21, 2011 6:43 AM
Subject: [SI-LIST] Derating Value of Power ICs


> Hi Experts,
>
> I am doing power analysis of our design.
> Can anyone help me to calculate the de-rating value of power supplies?
>
> I did a google search and not able to conclude how could I get those
> values.
>
> My data sheet or any other documents of the IC does not provide derating
> value directly or in any graph.
> Pls help.
>
> Regards,
> SIM
>
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