Hi,
How does the LM5160A work when sink current hits limit value(5.4A(typ)?
It seems to not to be described on the datasheet.
Best Regards,
Kuramochi
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Hi,
How does the LM5160A work when sink current hits limit value(5.4A(typ)?
It seems to not to be described on the datasheet.
Best Regards,
Kuramochi
Hi Kuramochi,
My understanding is when negative current limit is being hit, then the next cycle the positive current limit will also be hit since the value of negative current limit is almost 2x of the positive one.
Then after that it will follow the current limit description on the datasheet where the off timer will be engaged dependent upon what is the feedback voltage and the VIN
Thanks
-Arief
Arief-san,
Thank you for your help.
>the value of negative current limit is almost 2x of the positive one.
I can't understand this.
Could you explain me in detail?
I'm supposing fly-buck topology.
Best Regards,
Kuramochi
Hi,
Yes, what it means that whenever the negative current limit is hit, most likely the positive current limit will also be hit in a flybuck topology and there will be an off timer that gets engaged that makes your frequency foldback.
On this document, figure 12 you will see how the part handles the short circuit on the secondary side of flybuck converter
http://www.ti.com/lit/ug/snvu408a/snvu408a.pdf
Thanks
-Arief
Hi
Hopefully the explanation above answers your question. I will close this thread for now.
Thanks
-Arief