TOP 227Y demo board or similar

Posted by: AMG on 02/29/2012

Can you please recommend a demo board for TOP 227Y?

The one I was interested in was a TOP 227Y since we are looking at a transformer from Premier Magnetics P/N POL-24219 and we need 2 X 24VDC @ 85-265VAC (Int’l line voltage) input.

Here is the link to the application- http://www.premiermag.com/pdf/pol-24219.pdf

It does not have to be a TOP227 exactly. If you have a demo board with similar characteristics that we can test that will be fine.
It needs to work from -34C to + 74C approx. 50 watts total.

Comments

We do not have any physical board based on TOP227. The reason is that TOP227 is a very old device and we do not recommend it for new designs.

We have newer TOPswitch families and we have some demode designs in the following link

http://www.powerint.com/en/design-support/reference-designs/design-examples

We do not have anything that exact match your electrical and ambient specs. So any design listed in the link needs to be modified to meet your spec.

Can you please recommend a similar part that will work with that transformer that you have a demo board for?
I don’t have any preferences to a particular part if it meets the requirements. Thank you for your support.

This is not an easy question to answer. A lot of investigations needs to be done in order to give you an accurate answer.

I do not see any demo board that meets your needs. What I see is a reference design DER243. You can use this design as your platform. You will have to build the power supply from scratch.

DER243 uses a TOP269. This device has an internal current limit of 3.8 Amps while the TOP227 has a current limit of 3.0Amps. In order to make the TOP269 works with your transformer, you need to reduce the ILIMIT to 3.0 by adjusting the resistors connected to the X pin of the controller. You need to read the TOP269 data sheet and get familiar with the device characteristics for you to deliver a reliable design.

Now, another issue is to make your supply works in such wide range of temperature. You need to test if your supply runs and regulated at - 34C. And probably to use a fan to keep it cool when your temperature is 74 C.
It i s a big challenge design