I am designing a single port USB charger, and am trying to better understand the difference between TPS2511 and other devices like TPS2546. In the TPS2511 data sheet there is no specific explanation as far as how the Auto-detect feature works (page 13), just mentioning of auto selecting the divider mode, or a short, or 1.2V. In TPS2546 there is a more in depth explanation. Does the TPS2546 do it any differently (better?) than the other device. Also, the TPS2546 device tests the connected device and makes a selection of Divider one mode or devider 2 mode. (page 19). What is the advantage to that? If our 5V power source is sized to provide 3A for example, could not we just select the divider 2 mode and stay there; if a divider 1 devices is connected, it would just draw lesser current. Is there a benefit to switching the charger to the divider mode 1 instead of staying in higher power divider 2 mode?
Thx
