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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

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.

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

TitleSize
SCHEMATIC_12V5A (1).pdf21.45 KB

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

TitleSize
SCHEMATIC_12V5A (1).pdf21.45 KB

Dear dsahani,

 

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

 

-PI-ODO