DCP010507DB: Power dissipation

Hello

I am not sure what you mean be an "electrical" way.

However, it is straightforward to estimate the power loss for any converter.

First you would go to the data sheet and find the efficiency curves.

Choose a curve that is closest to your conditions for input voltage, output voltage, and frequency.

These curves are usually with respect to load, so find the efficiency at your load point of interest.

Then use the equation to find power loss: Ploss=Vout*Iout*(1-n)/n

Where n=efficiency.

As an example for a DCP010507 at 70% the efficiency is about 82%.

So Ploss=1W*0.7*(1-.82)/0.82 = 0.15W

To measure efficiency on the bench you will need 4 DMMs two for Vin and Vout, and two for Iin and Iout.

Then you have n=(Vout*Iout)/(Vin*Iin)

Be sure to use "kelvin" connections for measuring the voltages at the regulator.

Thanks

Hello

What I meant was estimating Power dissipation based on electrical equatons like the one given above.

I am not sure what this means: As an example for a DCP010507 at 70% the efficiency is about 82%. What is this 70%? Is it load at 70%? Is this from the efficiency curve on page 8 (Efficiency versus load DCP010507DB)

On page 3 of the datasheet it says that the max output current for this device DCP010507DBP is 0.153A, should I use this along with the output voltage to estimate power loss?

Hello

Yes, the 70% is a percent of load.

For the Ploss equation you would use your actual output current and output voltage.

The 0.153A is the maximum load that can be supplied by the regulator. 

It is probably easier to use the curves in the data sheet; however if you can give me

your specific requirements I can help you estimate the efficiency.

Thanks