Take the 2-minute tour ×
Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. It's 100% free, no registration required.

If we have a solar panel of 5V and we want to keep voltage on the output to 3V, what current we are getting on the output? The same as in the input? Or a different one?

share|improve this question

1 Answer 1

up vote 2 down vote accepted

The output power of the DC-DC converter is equal to the input power multiplied by converter efficiency. I assumed your DC-DC converter has an efficiency off 80%.

\$P_{out} = P_{in} \cdot 80\% \$

\$ 3I_{out} = 5I_{in} \cdot 0.8 \$

\$I_{out} = 1.33I_{in}\$

But not always. You get the maximum current that is supported by the converter. If that limit is reached, then this equation is not true anymore.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.