Lesson 8/1080%
MODULE 08

Design Flow & Interface-Wise Protection

Every port on a product needs its own protection decision -- an AC mains input, a USB port, and an RS-485 bus all see fundamentally different surge exposure and need different topologies.

Learning Objectives

πŸ—ΊοΈ
Follow a complete 12-step surge protection design flow
πŸ”Œ
Recognize typical protection topologies per interface type
πŸ“
Spot good vs. poor PCB layout practice for surge protection

The Same Topology on a Real Circuit & Board

These two views update with the interface selected above. Left: the concrete schematic of the animated topology. Right: where each part physically sits on the board — the first stage at the connector with the shortest possible ground/earth return, the decoupling element between stages, and the second stage placed at the IC it protects.

Schematic
Board placement (top view)

πŸ”Š Audio Explanation: Section 3

Prefer to listen? Press play for a full narrated walkthrough of why PCB layout matters as much as component selection, before (or instead of) toggling between the two layouts yourself below.

Ready to play · about 2 minutes

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KNOWLEDGE CHECK

Module 8 Quiz

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