3 Port 45W USB-C Charger (Formarly: pcie USB card.)

[Kilrah]

You don't. With the resistors you are telling the devices how much they are allowed to pull, and they will limit themselves to that. 

[Unimportant]

8 hours ago, thDel said:

 

How would i add the resistor so that each port recieves 3a?

You can't, a simple resistor won't do it.

You need an active current limiter circuit. That's a circuit that does not interfere and allows the full 5V to pass at currents below 3A and only starts clamping down and limiting current when said current tries to go above 3A.

 

 

[thDel]

1 hour ago, Kilrah said:

You don't. With the resistors you are telling the devices how much they are allowed to pull, and they will limit themselves to that. 

so i just remove them and i dont need anything else?

[thDel]

On 6/27/2020 at 4:51 PM, Unimportant said:

You need an active current limiter circuit.

 

On 6/27/2020 at 3:18 PM, Kilrah said:

With the resistors you are telling the devices how much they are allowed to pull, and they will limit themselves to that.

So do i need a current limiter or do i just remove the resistor and thats it?

[Unimportant]

8 hours ago, thDel said:

So do i need a current limiter or do i just remove the resistor and thats it?

That IRM60-5 power supply can deliver 10A. Without some sort of per-port curent limit it would be possible to pull the full 10A trough a single USB port. Afaik USB-C is only rated for 3A@5V without negotiation. To protect cables, connectors and devices in case of some failure you should limit the current per port to 3A. Simplest would be adding a fuse to each port, but requires replacing the fuse on each failure. More advanced would be some sort of electronic current limiting, probably some sort of hiccup topology.

[thDel]

 

On 6/30/2020 at 6:04 PM, Unimportant said:

Simplest would be adding a fuse to each port

 

Is there such thing as a small circuit breaker like the ones used at the front of houses but tiny?

[Kilrah]

Yep, commonly referred to as Polyswitch

https://www.littelfuse.com/products/polyswitch-resettable-ptcs.aspx