The H744 is a buck converter. You can read about buck converters here: https://en.wikipedia.org/wiki/Buck_converter
You have a good description there. Den fre 21 sep. 2018 kl 22:03 skrev Noel Chiappa via cctalk < [email protected]>: > Oh, one thing I forgot to include: > > > a lot of the incoming power in that 30V AC has to be thrown away, in > > producing +5V. > > So, if my understanding is correct, the 'switching' H744 really isn't much > better than a classic linear supply. It still wastes a very large amount of > the input power, and it still has a massively heavy transformer in it. Yes? > > So I wonder what exactly the advantage was in going to the switching > approach? > Yes, it keeps the output voltage steadier then a pure linear supply could - > but I'll bet there are analog approaches that can do the same. (They'd need > something that can produce a steady reference voltage, but the switching > approach needs, and has, the same thing.) Maybe the main output transistors > are happier being full-on or full-off, or something like that? > > Noel >
