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Welcome to Power Integrations' Green Energy Forum! Here you can discuss the latest developments in Energy Efficiency Regulations and Specifications (and circuits to meet them), EcoSmart technology, ideas on improving the energy efficiency of electronic products, or pose a question to Mr. Green. We hope that you'll find the Green Energy Forum informative and useful.

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Submitted by signtronics on 07/04/2016

Hello Sir,

I have designed a 12V-5A SMPS using TOP249 YN IC. Its a universal input design.

but its short circuit protection is not working. When I connect to the VARIAC, up to 100VAC its working

when i increases the input voltage, and then tryining to test for short circuit protection, its not working and

IC burns.

Can you plz provide me the solution.

 

Thank You

Please re-post your question to the Low Power technical forum.  Thank you.

 

-PI-ODO

Submitted by pareshj on 12/02/2016

i was designed one smps with 18V/2.5A output,but getting output voltage of 36V-37V.please guide me with proper solution.used ic is TOP248YN.

Submitted by dsahani on 05/12/2017

Dear  sir,

I am using LNK6667E for the 12v 5amp smps. Its have the output problems. I make the 5nos smps by attached schmatic whenever one smps is working and 4 giving the zero output. I am not to understand problem.

Please rectify my problem.

Thanks-

D Sahani

첨부 파일 파일 크기
SCHEMATIC_12V5A (1).pdf 21.45 KB
Submitted by dsahani on 05/12/2017

Dear  sir,

I am using LNK6667E for the 12v 5amp smps. Its have the output problems. I make the 5nos smps by attached schmatic whenever one smps is working and 4 giving the zero output. I think ICs not switching and  I am not to understand problem.

Please rectify my problem.

Thanks-

D Sahani

첨부 파일 파일 크기
SCHEMATIC_12V5A (1).pdf 21.45 KB

Dear dsahani,

 

Please re-post to the Low Power Forum.  Thank you.

 

-PI-ODO