~150V DC Regulator?

[Berserk87]

is there such thing as a regulator that can handle around 150V DC?

preferably a buck converter, not something that just turns the extra energy into heat.

ive been searching, but all the ones im finding are 80V input max.

 

[RCinFLA]

All the cheap A.C. inverters have a high frequency switching boost transformer power supply that creates about 155 vdc output. This is followed by a MOSFET H-bridge that creates the modified sinewave output to A.C. socket.

If your are looking for 150 vdc from A.C. mains I am sure there is switching power supply out there somewhere.

 

[Electronworks]

Try having a look at Power Integrations. They work off rectified (and smoothed) ac which is the same as dc..

 

[Berserk87]

im trying to take 150VDC down to something around 40VDC.

 

[blueroomelectronics]

What sort of current?

 

[Berserk87]

150V input , 32V ouput at 1Amp.

 

[bountyhunter]

150V input , 32V ouput at 1Amp..

You could easily build a buck to do that. However, it would be running at only 20% duty cycle so it wouldn't be real efficient.... still way more efficient than a linear.

 

[Berserk87]

Any links or suggestions? The only bucks I've "designed" are using national semiconductors web bench, and they don't seem to have a solution for what I need.

 

[Speakerguy]

What is your load? A DC source, or does transient response matter?

You can totally made a DC/DC converter without some pre-fabbed chip or module meant for that purpose. The dsPICs are used a lot for power converter 'brains'.

 

[Berserk87]

It doesn't matter, the load would be a bunch of LEDs and a possibly a micro controller or other simple things.

 

[bountyhunter]

Any links or suggestions? The only bucks I've "designed" are using national semiconductors web bench, and they don't seem to have a solution for what I need.

As loathe as I am to throw NS business, you could probably use a 400V PNP or P-FET as the power pass device bucking the main DC input, and use a switcher IC to drive an NPN with it's emitter grounded whose collector pulls down on the P buck transistor. There are probably a bunch of generic switcher controllers you could use, you will have to create a lower voltage rail like 20V to run the IC maybe with a power resistor and zener down from 150V. That bias voltage rail can be poorly regulated, doesn't matter.

 

[Mr RB]

Just buy a 110v mains to 32v DC switchmode supply. That will work fine from 150v DC input instead of 110v AC.

 

[RCinFLA]

Regular AC switching power supply will work from 150 vdc.

Just don't get a power factor corrected power supply.

If you want you can bypass the rectifier bridge in the switching power supply.