WEBENCH® Tools/LM25116: lm25116

alagar krishna

Part Number: LM25116

Tool/software: WEBENCH® Design Tools

i have designed the lm25116 pcb board for 12v @ 25 amps and used the quick start calaulator values

i got the output voltage as 12v , but when i put some load , the output voltage reduces to 2 or 3v

even i can vary the input voltage the output voltage stays constant ,this is true , but when i connect the load the output voltage goes to 2-3v

please help me out ,

pleasse let me know th error

0 Gavin Wang (Zejing) over 5 years ago

Hi alagar,

Can you share your quick start file so that I can check your spec? Your given information is limited. We can't guess the root cause.

And try to reduce your output cap to see any improvement.

Gavin

0 alagar krishna over 5 years ago in reply to Gavin Wang (Zejing)

0 Gavin Wang (Zejing) over 5 years ago in reply to alagar krishna

Hi ,

I reviewed your schematic, two suggestions:

1. Try to reduce your output cap to see any improvement.

2. Try to change Rramp=470k to see any improvement.

Gavin

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