3 ms·
You are right. I remember more details now. The problem occurs when you want to make regulated DC from a lower voltage DC supply. Step-down is easy. For exampl
by hrjet 12y ago
You are right. I remember more details now. The problem occurs when you want to make regulated DC from a lower voltage DC supply. Step-down is easy.
For example, my battery is 12V, but my laptop needs 19V. AFAIK, you can't get regulated 19V supply from the 12v battery without a transformer (or maybe something equivalent).
- dreamcompiler 12y agoStep-up is easy too. That's what boost converters (http://en.wikipedia.org/wiki/Boost_converter http://en.wikipedia.org/wiki/Boost_converter) are for. Most single-cell LED flashlights contain tiny boost converters to increase the 1.5v coming from the battery to above the drop voltage of the LED.