4 ms·
The problem is that on the one hand they want to enable USB-c to be low cost and universal for all devices. But on the other hand you want USB-C to support 100W
by lathiat 5y ago
The problem is that on the one hand they want to enable USB-c to be low cost and universal for all devices. But on the other hand you want USB-C to support 100W and 240W charging but it’s not cost effective to put enough copper to carry 100-240W in your average low cost phone cable.
So the cable needs something active to indicate it’s capability. So you don’t melt it.
- minitoar 5y agoI imagine you could do this passively with some differently valued resistors in the cable.
- ajsnigrutin 5y agoOr even actively by the charged device reporting the voltage on its end. Too much current, high voltage drop, better decrease the current.
- dotancohen 5y agoThat would only occur during the overcurrent event. Robust engineering would not only try to correct existing overcurrent events but also to prevent them.