How to make DC regulator 100-250 vdc in, 30vdc out 6-10 amp

[magtec]

Need help designing a DC regulator with input window of 100-250~vdc , regulated to 30vdc output capable of 6-10 amp continuous current

 

[Harald Kapp]

Look up "step-down converter" or "buck converter".

 

[magtec]

Thanks, will do