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A project log for Qi and USB Li Charger Flex Module

Charger system for Li batteries with fuel gauge. Works with Qi wireless or USB power source. For sale on Tindie.

Chris HamiltonChris Hamilton 02/10/2015 at 18:420 Comments

Initial design is off to OSHPark. This design is 4 layers, but kinda breaks the rules in having what is essentially 3 signal layers. The ground plane is solid, but there are many high current traces, so they are actually placed on the bottom layer instead of a split internal VCC layer. This allows the design to be functional and fit within the 4 layer stack for OSHPark. The analog ground is somewhat isolated, though there may be issues with some near traces. The inductor is well isolated from traces.

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