9.2.2 Detailed Design Procedure

In a self-powered configuration, the TUSB2046x can be implemented for individual-port power management when used with the TPS2044 because it is capable of supplying 500 mA of current to each downstream port and can provide current limiting on a per-port basis. When the hub detects a fault on a downstream port, power is removed from only the port with the fault and the remaining ports continue to operate normally. Self-powered hubs are required to implement overcurrent protection and report overcurrent conditions. The SN75240 transient suppressors reduce inrush current and voltage spikes on the data lines.

Figure 11. TUSB2046x Self-Powered Hub, Individual-Port Power-Management Application