Würth Elektronik Watts Up Podcast

USB Interface from an EMC Point of View Part II

Jun 17, 2021

In last week's broadcast, we began our discussion regarding the design of a USB but from a viewpoint of EMC considerations. We discussed the hardware and components, EMC circuitry, and the use of a USB filter. This week, we begin with the filter for DC supply.

REFERENCED IMAGES:

Figure 11:

Figure 11- Complete 2.0 Circuit Diagram

Figure 12:

Figure 12- Insertion Loss

Figure 18:

Figure 18- Theoretically Possible Insertion Loss

USB Interface from an EMC Point of View- Part I

Pdf

Jun 10, 2021

Today's discussion centers around the Universal Serial Bus, commonly known as USB. We'll be discussing the interface from an EMC point of view, and talk about technologies, hardware and components, PCB layout, and more.

FIGURE 1:

REFERENCED IMAGES IN THIS PODCAST:

Figure 1- Pin Assignment of the USB Interface

FIGURE 2:

Figure 2- USB Cable Construction

FIGURE 3:

Figure 3- USB Interface Bidirectional and Symmetrical

FIGURE 4:

Figure 4- Symmetrical transmission

FIGURE 5:

Figure 5- High Quality Circuit Design

FIGURE 7:

Figure 7-Differential Data Mode 2

Safe, Reliable Designs for Non-Isolated Offline Switchers with 400VDC Rated Power Inductors

Jun 3, 2021

Although the majority of AC offline converters and switching converters that run from hazardous voltage, include galvanic isolation for safety, there are many applications where non-isolated circuits can be used. Where mechanical isolation protects the user and service personnel from contact with hazardous voltages, or...