ESP32-S3-DEVKITC-1 ESD Protection

[Jonathan2892]

Hi,

I am designing an own development board and was wondering about the ESD protection on the esp32-s3-devkitC-1 schematic:
https://dl.espressif.com/dl/schematics/ ... 220413.pdf

For VBUS, D+ and D- a LESD5D5.0CT1G (https://datasheet.lcsc.com/lcsc/1912111 ... 383211.pdf) is used. But D+ and D- are +3.3V level and VBUS 5.0V. And the LESD5D5.0CT1G has V_RWM of 5V.

Is it save to use the LESD5D5.0CT1G for all the lines? Or should I consider to have a different one for the D+ and D- lines? For example I could use a LESD11D3.3CT5G (https://datasheet.lcsc.com/lcsc/1806082 ... 172400.pdf).

Also maybe someone can explain to me how important the Ipp is and which value I should consider for the TVS-diodes according to my power input of max 5V and 2.8A.

Best,
Jonathan

[ESP_Sprite]

The ESP32 has internal snapback devices in order to handle ESD on all pins. The external ESD protector is simply a belts-and-braces approach to make sure someone doesn't accidentally zap through the internal protections.

[Jonathan2892]

Ah I understand now. Thank you!

[ESP_LJH]

And I want to say since devkit board is mainly for develop, if you design board for products, I think you should use especial ESD diode component for USB port.