Ultrawide input supply - possible?
Posted by: MMC
on
Hi all,
I need ultrawide supply with 100-900 V *DC* input. Non-isolated is OK.
I want to use DER-47 idea but combine it with stack-FET idea
as per DI124 to increase input span. 1W of output power is enough.
Output voltage is 5V...10V (not critical).
So is it possible to add stack-FET to DER-47 (or similar) schematic?
Thanks PI support in advance,
Victor
Comments
PI-Sarek, thanks for reply;
If course I could just use DI-124 configuration as is. My question was
specifically about schematic in DER-47 supplemented with Stack-FET.
The idea is to get rid of the transformer - DER-47 does not use one.
So, again, can *schematic in DER-47* be supplemented with StackFET
to increase input voltage?
Thank you in advance,
Victor
PI-Sarek, thanks for reply;
If course I could just use DI-124 configuration as is. My question was
specifically about schematic in DER-47 supplemented with Stack-FET.
The idea is to get rid of the transformer - DER-47 does not use one.
So, again, can *schematic in DER-47* be supplemented with StackFET
to increase input voltage?
Thank you in advance,
Victor
You may use the StackFET arrangement to design a high input voltage power supply using any of our integrated switchers.
The DI-124 shows a design example.
Since your input voltage is very high, a flyback configuration same as DI-124 could be used. If isolation is not a requirement a simpler feedback circuit could be used and the optocoupler could be eliminated.
Regards
PI-Sarek