I am designing a system which has a mcu (with usb peripheral). The whole system is powered by a 18650 Li ion battery. Now, imagine I am charging the battery by plugging the usb to a computer usb socket or even a wall adapter. The max current via the usb 2.0 is 500mamps. But this is a 3400mAH battery and so would take hours.
I then saw som articles on DCP (dedicated charging port). So basically I will have to short the d+ and d- via a very small resistor. By doing so it goes into a high charging current mode.
Now imaging I am using a Li ion charger like the rt9511. It can charge the battery using only a max of 500mAmps. How can it take more than that leave alone 1.5Amps. Or do we have different Li ion charger ic that can manage charging up to 1.5Amps ?