Fairphone 2 hardware extensions

[keesj]

Hello,

@Aypac

My personal understanding of this is, that there is a Schottky diode (or something similar) between VBUS and Bat+ => You can not charge via VBUS, you won’t get higher Voltages than ~4.15V.

VBUS is conected to the PMIC’s charge pump (the same one delivering 5V when using USB OTG). It is not possible to charge via that pin.

The charge pin allows charging it is connected to the secondary charge pin(DC_IN) of the 8941 PMIC.