@mjg59@nondeterministic.computer
2026-09-20 07:26 UTC
Ok, I have perhaps got an idea here? The PD controller is receiving 5V from the charger, but is not receiving 3.3V on its input line. That /should/ be coming from a TCK107AG, which seems to be getting 3.3V on its input and on its control but does *not* appear to be generating 3.3V on its output. This would probably explain the behaviour, but if so I am going to have problems because this fucker is 0.79mmx0.79mm
Replies (2)
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@faebudo@ioc.exchange 2026-09-20 08:07
@mjg59@nondeterministic.computer A shorted TVS diode (or another component) somewhere on the 3.3V rail supplied by that regulator?
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@womble@infosec.exchange 2026-09-20 08:25
@mjg59@nondeterministic.computer that is quite the smol boi.