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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
QDrives , 11-12-2025, 04:15 PM
Close to the connector is best in my opinion.
QDrives , 11-12-2025, 04:17 PM
It depends on the length of the traces. If they are short, it does not help.
Shiro , 11-12-2025, 06:31 PM
Alright, thank you so much 🙏 I have one more question. I really want to improve my PCB design skills, but I’m not sure where to start. I’d like to learn more about high-speed design and signal integrity. Could you please recommend some courses I should take?
Shiro , 11-12-2025, 06:32 PM
I am planing to get Advanced PCB Layout CourseAdvanced Hardware DesignAdvanced Digital Hardware DesignMixed-Signal Hardware Design with KiCadbut i don't know which order should i go with
Robert Feranec , 11-12-2025, 11:08 PM
If I can recommend my course, then Advanced PCB Layout
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