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3.3v 80ma power supply for energy meter

Posted by: prateek.jain on

i want to design a power supply for single phase energy meter with following specifications

 (using switched power supply)

1. 3.3 v and 5 v

2. 80mA

3. upto 4Watt power

4. flyback topology 

5. low cost and high efficiency 

 

please help me .. 

Comments

Submitted by PI - Traveler on 11/01/2012

We actually have a section on our website for Utility/Energy/Smart Meters:

http://www.powerint.com/en/applications/utility/power-meters

 

Without knowing your input specifications, isolation requirements, etc, I can't fully make a reccomendation but there are a dozen different Reference Designs and Design Ideas on this page to help you get started.

 

Often with Utility/Energy Meter questions, the issue of high input voltages comes up.  If this is the case for your application, I would recommend searching on our website for our StackFET solution for these appliacations.

 

Here is one of our  guides/explanations of StackFET:

http://www.powerint.com/en/community/papers-circuit-ideas-puzzlers/circuit-ideas/-high-voltage-input-switching-power-supply-usi

 

Here is one of our Reference Designs that uses StackFET:

http://www.powerint.com/sites/default/files/PDFFiles/der105.pdf

 

Let me know if I can be of further help.

 

Regards,

The Traveler

 

Submitted by prateek.jain on 11/02/2012

my input will be 85-288VAC. I dont need to worry about high voltage issues right now at least..

Submitted by prateek.jain on 11/02/2012

if i get 5v output only then also it is fine. I can add some few more components to get 3.3v

Submitted by prateek.jain on 11/02/2012

my input will be 85-288VAC. ..i checked that stack FET . my input voltage range is different from that.

Submitted by PI - Traveler on 11/02/2012

The lower input voltages you have in your application make the project easier than I initially thought.

 

Based on the power levels you've described, LinkSwitch-CV would be a good fit for your needs.  If you want one of our Reference Design Kits, RDK-201 would be a good one to start with.   It's only a single output design but it would give you an idea about where to start.  When you have a better idea of what your final specs will be, you can optimize a new design using our PI Expert Design Software.

 

RDK-201 Documentation:

http://www.powerint.com/sites/default/files/PDFFiles/rdr201.pdf

 

Regards,

The Traveler

 

 

Submitted by prateek.jain on 11/05/2012

instead of lnk625 that you have mentioned ,can i use lnk304 . what are the differences between them?

Submitted by PI - Traveler on 11/06/2012

LNK304 is part of the LinkSwitch-TN product line.  It offers a simpler control scheme and a generally simpler design. It's also a bit better suited for non-isolated designs although flyback designs can be created with it.

 

The LinkSwitch-CV product line has a more advanced controller and will give you better load and line regulation, better efficiency, light-load operating characteristics, etc.

 

Regards,

The Traveler