Electronic – 20w Boost Converter

boostdc/dc converter

I am new here so I would like to say hi to everyone. I just recently jut into electronics and I have a question on a project I am working on.

I am trying to power a 20W heating element off of a 3.7v 18650 lithium battery. I wanted to know if it is possible to design a boost converter that can take the 3.7v and boost it to 20W? I know in order to calculate watts it is voltage x amps= wattage. the element I am working with says 5v and 4-amps to make 20W. I have googled this and I keep confusing myself.

Summary: I want to know if I can design a boost converter that can has an input of 3.7 and can output 5v @ 4-amps, or any combination there/of to achieve 20W?

Best Answer

It is possible to boost 3.7V to 5.0V. You cannot boost power, you can boost voltage. If you need 4A at 5V, and boost convertor has efficiency say 90%, than your battery must be able to provide 6 amperes. If you have such battery, than you can do it.