Help designing power supply pcb circuit for wide range input ac/dc

[fastline]

Here is the deal. We have a couple custom circuits that we are designing that use no more than 1A at 5V. available power to run our circuits will vary so we want to make something that will accept say 10-100V AC or DC. Usually we might do a bridge and a reg but regs rarely deal with this much fluctuation.

I have seen this type of supply on several modern components and not sure how it is done. There is a small LCD monitor that accepts 10-400V !! With what we are doing now, ours will blow up at 32V. We really need to handle fairly dirty AC well and power a PIC without problems.

 

[crutschow]

Typically a power line switching regulator is used. There are ICs specifically designed for that purpose.

 

[fastline]

Could I assume you would still create a bridge to get DC power to the IC, then the IC will regulate only DC power? Or is this an all in one solution?

 

[crutschow]

Could I assume you would still create a bridge to get DC power to the IC, then the IC will regulate only DC power? Or is this an all in one solution?

That would be the likely circuit configuration.