Isolated USB Repeater – USB2.0

The project presented here is a USB port-powered, USB 2.0 isolator that isolates the USB host and USB device. It is a galvanically-isolated USB2.0 repeater, that supports low speed  1.5Mbps,  and full speed  12Mbps  communication. The project automatically connects and detects the bus speed. This  USB 2.0 isolator  is efficiently powered from the USB port and requires no external power, on board isolated DC-DC converter U1 provides 5V to the other side of the circuitry and USB port. U2 LDO provides  3.3V  to the chip. L1 and L2 ferrite beads take care of noise immunity on the DC bus. The project protects the host USB port from noise and high voltage.

C107