DC-DC step down converter & increase the input voltage?
Background: Bought a cheap mail order DC-DC stepdown converter. It was advertised as a 12-24V to USB converter ie 12-24Vdc to 5Vdc. When it arrived the input voltage was marked as 12V ie no mention of a 12-24V range.
So, what happens if I use it with a 24Vdc supply? Will it release the magic smoke? Will it work but the output voltage be different? Or will the output voltage still be a nominal 5V but maybe a different amperage?