Tell me more ×
Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. It's 100% free, no registration required.
up vote 0 down vote favorite

We are designing a circuit which should be powered directly from mains (230VAC), and have in the previous design used a normal transformer.

But in the next design we would like to use an AC-DC converter, since this could make our design more flexible with possible input of 120VAC to 230VAC 50/60Hz.

The output of the converter is preferred to be 5VDC but could be higher.

I have found the bp5048-15 from ROHM, which would do the job.

www.rohm.com/products/databook/pm/pdf/bp5048-15.pdf

Does anyone have a better or cheaper solution?

EDIT: wall adaptor is not an option, we need to supply the product directly with mains.

share|improve this question
And using an off the shelf power adapter INSIDE the case? – clabacchio♦ Mar 4 '12 at 10:09
It all needs to be mounted on one pcb. We have limited space. – JakobJ Mar 4 '12 at 10:41
Fine, but it's hard to reach the same livel of integration of this – clabacchio♦ Mar 4 '12 at 10:47
1  
Lots of companies make small "power bricks" intended to be embedded into other products. They are usually already safety-certified, which is important if you want to sell this publicly. – Olin Lathrop Mar 4 '12 at 14:40

1 Answer

up vote 1 down vote accepted

A Power Integrations TinySwitch can also be used to make a simple non-isolated rail for low-power applications. I've had success with these parts in the past.

http://www.powerint.com/en/products/tinyswitch-family

(apologies for the pasted link, SE sites with iOS Safari are painful to use)

share|improve this answer
Thanks, I will go with one of the integrated power switches. Probably one from ROHM, since they meet our demands better. – JakobJ Mar 6 '12 at 8:47

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.