Louis Lugnutz
Junior Member
Just got my new Samsung Galaxy Note 9, ok cool. I hesitated for a moment buying it when I realized it had USB type c, as I don't care about the reversible connector and I have some high quality micro USB cables, but made the purchase anyway, along with some adapters for micro USB to USB C.
Well now with a bit of research I learned there is a problem with this and I would like to know the experience and thoughts of others who have experimented or understand the electronics involved.
My understanding so far is that USB Type C is 3A, while previous was 2.1A or 1A. So if you just put an adapter on a microUSB cable that the 3A current draw can easily burn out your charging source, a real bummer if it's a laptop or something expensive that you plugged it into.
One solution to that problem is that many USB Type C cables and adapters have a built in 56k ohm resistor built in to reduce the current draw, but that will slow down the charging significantly.
An aside, I was wondering then why doesn't a 1A charger blow out if I plug my old Note 5 into it which charges faster on a 2.1A charger, but I think there is something in the circuitry that limits the current, but not effective enough for the 3A draw, still trying to figure that one out in detail.
The real question is does anyone have any experience and/or know the current rating for the USB charging port in my 2015 RAM 1500. I'm inferring that it is likely not 3A rated and that I will likely blow it or its fuse out if I try charging my new phone without a resistor. I'm tempted to try it though as I infer that the truck must have a fuse to that port to protect the truck from this action, so if it blows it I can just replace the fuse and if it doesn't blow it then great.
Has anyone been charging their USB Type C device from the USB port without using a resistor?
Well now with a bit of research I learned there is a problem with this and I would like to know the experience and thoughts of others who have experimented or understand the electronics involved.
My understanding so far is that USB Type C is 3A, while previous was 2.1A or 1A. So if you just put an adapter on a microUSB cable that the 3A current draw can easily burn out your charging source, a real bummer if it's a laptop or something expensive that you plugged it into.
One solution to that problem is that many USB Type C cables and adapters have a built in 56k ohm resistor built in to reduce the current draw, but that will slow down the charging significantly.
An aside, I was wondering then why doesn't a 1A charger blow out if I plug my old Note 5 into it which charges faster on a 2.1A charger, but I think there is something in the circuitry that limits the current, but not effective enough for the 3A draw, still trying to figure that one out in detail.
The real question is does anyone have any experience and/or know the current rating for the USB charging port in my 2015 RAM 1500. I'm inferring that it is likely not 3A rated and that I will likely blow it or its fuse out if I try charging my new phone without a resistor. I'm tempted to try it though as I infer that the truck must have a fuse to that port to protect the truck from this action, so if it blows it I can just replace the fuse and if it doesn't blow it then great.
Has anyone been charging their USB Type C device from the USB port without using a resistor?
