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It's My First Time Using USBLC6-2. Is This Design Good?
Shiro , 11-11-2025, 07:29 AM
Hello!I am trying to add a protection circuit for my STM32F411. I've never used the USBLC6-2 before. Is this design OK, or is it overkill? I am new to PCB design and looking forward to learning more.
QDrives , 11-11-2025, 08:58 PM
Overkill - No.So add some 22 Ω or 27 Ω resistors in series with the USB to the MCU.Be careful with the ferrite bead (inductance) and ceramic capacitor. Chances are great that it will cause anto-resonances that are more problematic than the problem it may solve.
Shiro , 11-12-2025, 02:37 AM
Should i also define USB_DIN_P and USB_DIN_N as differential pairs?
Robert Feranec , 11-12-2025, 05:12 AM
in some recommended schematics I saw a capacitor close to the power pin of the protection
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