« first day (2039 days earlier)   

2:19 AM
If I need to step down 120Vac to 48Vac, do I need a specifically 48V transformer?
 
@user193661 Not if you're going to use a regulator to get a more stable/accurate output voltage.
 
I will. How close should I get?
 
@user193661 Linear regulator or switching?
 
2:36 AM
Probably switching. The output is 48Vdc
 
@user193661 Then I think the main reason to keep it close to 48 V is for safety certification. If all the voltages on the secondary side of your transformer are less than 48 V (rms?) you will have an easier time with safety rules. But you'll want to do some research on this. 48 V rms should be enough to drive a 48 V buck converter, but I don't have enough experience to tell you the true best circuit, etc.
 

« first day (2039 days earlier)