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ADP8140 3-string operation and sink pin over voltage

Question asked by m-kun on Jul 20, 2018
Latest reply on Jul 22, 2018 by JonD

Hi

I have two question about ADP8140.

 

1:

Can ADP8140  operate under 3-string?

Under 1-string open circuit(SINKx),

 

 

 

2:

Absolute Maximum Ratings about SINKx is 21V(max).

 

 

If all LED gets shorted  when using 100V as power line we would see 100V on SINKx .

This condition of all LEDS short is valid when testing for system integrity and will exceed SINKxs Absolute maximum rating .

 

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