Hi all,
I'm trying to figuring out how a circuit which employs an unregulated Dc-DC converter works. I've never used one before, so I'm asking for some clarifications. The dc-dc converter is the PICO 5A250S
Hi all,
I'm trying to figuring out how a circuit which employs an unregulated Dc-DC converter works. I've never used one before, so I'm asking for some clarifications. The dc-dc converter is the PICO 5A250S
Look up Royer converter
It's a self oscillating 50% duty cycle converter
Cheers
Klaus
"Unregulated" typically means that the output is proportional to the input for all inputs in the operating range. Outside the spec range, it might not work at all. It probably won't work at 0.5 volts in. Practically guaranteed to not.
The output will be in the specified range if both the load is the specified value and the input voltage is the specified value.
Your feedback loop might still work. Try it.
Aren't those Pico things awfully expensive?
-- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Il 26/02/2016 00.47, John Larkin ha scritto:
Thanks for the replies. The voltage is set by software, I've re-measured:
- 0.6 V at input for 20 V at the output
- 3.8 V at input for 230 V at the output
I've also the same your impression that these devices are too expensive. Actually, the presence of this component on the board has led me to investigate the associated circuitry and try to understand what was special with it. I've never done anything similar before, but I think I've seen some circuits which grant the same performances with cheaper components, probably at the expense of dimensions and complexity.
Bye Marco
This is an electronic design group, so some of us would be inclined to design your whole loop from parts. But that would take a bit of engineering, which might not be optimum for your situation.
If your load is small, you could start with a fixed HV and linear regulate it down, especially good if you need multiple regulated outputs. Or build a boost regulator using a standard chip, like an LTC3803. The LTC and a transformer and some diodes and such might cost $6 or so.
-- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.