I might have guessed that would be a reservoir capacitor for the fan to keep in-rush dips, noise and ripple, off the 5V rail.Yes, I did wonder about that one. Mine is marked "100" and with polarity bar, but a different code. Looks more like a capacitor than a TVS, but appearances can be deceptive.The Pi5 does have a component with similar appearance immediately behind the stacked USB-2 connectors and next to the fan connector.. Mine is labelled "100" and "38VPF". Also has a bar at one end indicating polarity. Maybe TVS or capacitor. My Googling didn't find anything.Note, however, that this TVS is a fairly bulky component, and I can't see an equivalent on the Pi5.
Is it possible that any over-voltage protection is included within the DA9090 PMIC ?
This is my assessment of how things are for a Pi 4 which I would expect to be the same on a Pi 5 though the exact voltage points may vary, E&OE -
Code:
.------------------------. --. | Over-Voltage Breakdown | | 6.74V -|------------------------| | Potential damage | Over-Voltage | | 6.00V -|------------------------| --' | More than allowed | 5.50V -|------------------------| --. | Allowed | | 5.25V -|------------------------| | | Nominal VIN | | USB VBUS voltage range 4.75V -|------------------------| | | Allowed | | 4.40V -|------------------------| --' | | -| Reliable Operation |--------------------------. | | | -|------------------------| Under-Voltage Indication | | Unreliable Operation | | 0.00V -^------------------------^--------------------------'Statistics: Posted by hippy — Fri Jun 28, 2024 10:22 am