TUSB2046B, TUSB2046BI

4PORT HUB FOR THE UNIVERSAL SERIAL BUS

WITH OPTIONAL SERIAL EEPROM INTERFACE

SLLS413B − FEBRUARY 2000 − REVISED DECEMBER 2004

17

POST OFFICE BOX 655303

APPLICATION INFORMATION

self-powered hub, individual-port power management

In a self-powered configuration, the TUSB2046B 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.