Re: Schematic Review Request: ESP32-S3 Mini-1U + SDNand Flash + I2S Microphone for Drone Audio Logger
Posted: Thu Jan 15, 2026 3:58 pm
Throwing in my 2 bits...
1) Consider the TI ESDS312 sot23 packaged device to protect the USB lines.
https://www.ti.com/product/ESDS312?utm_ ... CMQAvD_BwE
2) Consider the use of a USB load switch over the diode that is currently in place. This load switch can offer a slow start for protection against in-rush currents on VBUS which are very deadly to semiconductors.
WCH CH213K = Diodes AP2331
https://www.lcsc.com/product-detail/C5456874.html
English documentation:
https://akizukidenshi.com/goodsaffix/CH213.pdf
https://www.diodes.com/part/view/AP2331
3) In addition to the above, we apply series EMI filters onto the USB lines.
Kingcore WCM-1210HS-600T (lots of drop in replacements for this footprint and part but Kingcore is a very high quality mfr of the same product for other OEMs under private label. They are in Taiwan).
https://www.kingcore.com/storage/produc ... %20A05.pdf
We are a long time design house and manufacturer for tier 1 OEMs including Foxconn. The above combination of parts are used on our medical products with very high shipped volumes and zero failures.
Hope this helps.
1) Consider the TI ESDS312 sot23 packaged device to protect the USB lines.
https://www.ti.com/product/ESDS312?utm_ ... CMQAvD_BwE
2) Consider the use of a USB load switch over the diode that is currently in place. This load switch can offer a slow start for protection against in-rush currents on VBUS which are very deadly to semiconductors.
WCH CH213K = Diodes AP2331
https://www.lcsc.com/product-detail/C5456874.html
English documentation:
https://akizukidenshi.com/goodsaffix/CH213.pdf
https://www.diodes.com/part/view/AP2331
3) In addition to the above, we apply series EMI filters onto the USB lines.
Kingcore WCM-1210HS-600T (lots of drop in replacements for this footprint and part but Kingcore is a very high quality mfr of the same product for other OEMs under private label. They are in Taiwan).
https://www.kingcore.com/storage/produc ... %20A05.pdf
We are a long time design house and manufacturer for tier 1 OEMs including Foxconn. The above combination of parts are used on our medical products with very high shipped volumes and zero failures.
Hope this helps.