MacroFab Engineering Podcast

MacroFab's Engineering Podcast! Where Electrical Engineers, Parker Dillmann and Stephen Kraig talk about electrical engineering topics, DIY projects, and industry news. Sometimes cool people stop by the podcast to drop some knowledge.


episode 316: Chunk 2 Chunk Current Returns

MEP EP#316: Chunk 2 Chunk Current Returns
Circuit grounding - How big is too big?

  • Stephen has a new design that is trying something very odd
    • Planes that connect to the star
  • Difference between different grounding techniques
  • 8 layer monster board with multiple power supplies - low noise
  • Parker likes to think of these problems as the extremes of certain examples as a way to think about what happens
    • Take a "star" topography ground for instance
      • Make the trace lengths that connect to the "star" really small
      • Make the star point really "big"
      • This is vias connections direct to a plain
Coilcraft has “Elevated” inductors
  • Parker found this tweet by Lukas Henkel showing coilcraft has inductors that are elevated off the PCB which allows placing parts under the component
  • Coilcraft XAR7030 series
    • Unique off-the-board design provides 1.5 mm clearance for parts to be mounted underneath
    • Magnetically shielded for high density applications
  • Torex Semiconductor has combined switch mode controllers and inductors to build micro DC/DC converters
  • PCB Assembly problems?
    • Should XYRS now have a Z height?
    • This is typically on the CMs to "get it right"
    • Probably best to let your CM know what your doing in this case to reduce confusion


 2022-02-19  56m