ctzof
Full Member level 3
Hallo,
I want to create an esd protection for my USB port. Searching on the internet I've found many possible configurations so I decided to use the following. I've created a GND_EARTH plane where USB Shield is connected. This plane is connected to the normal GND through an RC filter. ESD diodes are connected to each USB signal to GND_EARTH. For the data lines I use STF203 which is also connected to GND_EARTH and VBUS (5V) from USB. GND_USB is connected to normal GND directly. The thing is I'm not really sure if this configuration is correct and won't create any problem due to different grounds in the circuit. Attached you can find a picture of the circuit.
I want to create an esd protection for my USB port. Searching on the internet I've found many possible configurations so I decided to use the following. I've created a GND_EARTH plane where USB Shield is connected. This plane is connected to the normal GND through an RC filter. ESD diodes are connected to each USB signal to GND_EARTH. For the data lines I use STF203 which is also connected to GND_EARTH and VBUS (5V) from USB. GND_USB is connected to normal GND directly. The thing is I'm not really sure if this configuration is correct and won't create any problem due to different grounds in the circuit. Attached you can find a picture of the circuit.