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badgeteam / why2025-hardware

Hardware design files for the WHY2025 badge
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VBUS to connect <-> pmic trace not wide enough #73

Closed ranzbak closed 1 month ago

ranzbak commented 1 month ago

Given that the badge needs to be powered from USB-C even when no battery is present, the 0.45mm from the USB-C connector to the PMIC is not wide enough.

Suggest 1.2mm(+?) wide track to the PMIC to keep the impedance and voltage drop as low as possible between the USB-C port and the PMIC.

After the PMIC the trace can continue narrower as the current will be lower in that segment.

ranzbak commented 1 month ago

Lagest part of the USB-C connector to the PMIC is 1.2mm wide, which should result in a lower voltage drop.