3 ms·
> The standard has no way to detect damaged cables Of course it does. All it needs is to ask the other device what voltage is on the other side, calculate resi
by ilyt 3y ago
> The standard has no way to detect damaged cables
Of course it does. All it needs is to ask the other device what voltage is on the other side, calculate resistance off it and trip or drop to lower power mode if it deems that there is too much power lost in the cable. Still not perfectly safe as say 3W lost over whole cable is far less dangerous than this 3W loss focused solely on dodgy connection but still.
- Kirby64 3y agoWhat part of the standard mandates, or even optionally supports that? Standard USB-PD only requires that you negotiate a voltage and current suitable for both sides (among a preset list). It essentially goes open loop after that; you can't exceed the current limit set, but beyond potentially tripping the PD controller (on the sink side) if the voltage drops too low, there's not really any protection here. It's fully on the PD sink to implement (or, not implement) any sort of protections like that.
- Eisenstein 3y agoI think the parent was saying that it could be done, not that it is being done.
- ilyt 3y ago> What part of the standard mandates, or even optionally supports that? None, which is the fucking problem. Cheap cable can just lie about it's current capacity.