Need help for SMPS 0-450V 200mA

[nico.verduin]

200v smps

Anybody have a schematic for an smps with variable output 0-450V (or something like that), 200mA max output. Preferably 230Vac input.

I have built a nixie 200V SMPS with 12V input, but that only delivers about 20mA output.

Any help is appreciated.

Regards
Nico

 

[rajudp]

you better go for full bridge

 

[michal.rogaczewski]

Full bridge would be total mistake in this application (90Watts and large output voltage range) I think Flyback would be much better, of course the lowest voltage that can be used wouldn't be lower than 20V (Lower Voltages may be unstable) but i don't think that's a problem.

Sorry for my English I'm from Poland, and I'm only 16 But i've made lots of Power supplies

 

[rajudp]

in flyback for output volt 450v the spike will be very high

 

[willi65]

Hi


I think Flyback the wrong way..u only think the desing of the transformer..the leak inductance high,becuase u need many windings..mean u have HV spikes..and
the problem are 0-450V the first..u calulate the Dutycycle first.. u need an PWM 0-98%..
i think the best solution ..u make an PFC ..the Outputspannung are 450V..u can use like FAN48** or some St component..after u make an Floating Ground Step Down Converter..there are easy to make the Current limiting and ec...

Willi

 

[rajudp]

but he need it in buck/boost design from 0-430v

 

[willi65]

Hi

i think u understand wrong..first u have an PFC Booster..the Outputvoltage are 450V..u connect an Stepdown to this PFC....the Input voltage of the stepdown are 450V..

Willi