Hi team,
I have some question about LP8860-Q1:
- I saw some discussion about Rsense selection, just want to clarify: for Rsense=25mohm, BOOST_IMAX_SEL=000 mean maximum current limit is 2A; for Rsense=10mohm, does BOOST_IMAX_SEL=000 mean maximum current limit is 5A?
- Could you explain why we need sense the low-side switch current? For boost over-current protection? However, from the DS P43, over-current protection is achieved by detecting the Vboost.
- For Fig.21, how to keep the output current constant since we didn't detect the LED current?
- Since the output voltage is the same for 4 led strings, the dropout voltage of LED strings may not be different even with a same current flow through. How to close this gap?
Thanks.
Dongbao