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Detecting failed LEDs in parallel

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eem2am

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hello

this SMPS circuit powers the parallel LED paths.

2a0c9cj.jpg


It also detects if there is any open circuit LED and latches the circuit off if there is any or all open circuit LEDs.

I wish to change it so it only latches off in the event of ....

"No LEDs lit due to failed LEDs having gone open circuit"

in other words.......

if there are any LEDs lit, i dont want it to latch off, otherwise, i want it to latch off.

...but dont bother detecting shorted LED failures as these dont occur.

also, component count needs to be low.

any ideas?
 

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