Looking for list of materials and schematic of SMPS circuit

[kumar]

Hi!

I need a SMPS circuit for 90 to 275 VAC input and with output of +/- 7.5 VDC 500 mA.

Could someone help me by providing schematic drawing and bill of materials for this.

Thanks

Bye!

 

[horusaz1]

Kumar:

That's a bit vague. I mean, what are your constraints...what is it for...etc. That's a BIG range (90-275), though not a lot of power. For an "easy" solution, I'd recommend doing something like a switchable doubler vs. full wave bridge on the front end to deal with the wide input range, a bank of caps for clean-up, then a two output buck converter. The ccts are pretty easy to come by (recommend picking up the SMPS books by Billings and/or Pressman...it won't take you too much to spin something basic together that'd work.)

Regards,
haz1

 

[105389]

take a look at pi expert

http://www.powerint.com

you are looking for the tinyswitch-ii

you can get a cd of app notes and design sof

have fun

 

[darksky041257]

An excellent range of devices are the Topswitch.

Very reliable and easy to use.

Search on the net for 'topswitch power'