The Amp Hour

Switching Converter Engineering with Carmen Parisi

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  • Chris and Carmen have both been co-hosts of The Engineering Commons and both wrote on EngineerBlogs.org
  • Carmen is a Staff Application Engineer at Renesas, in the division that used to be Intersil
  • Field Application Engineers (FAE) vs Application Engineer (AE)
  • The chips Carmen works on help power Intel / AMD processors
  • AE vs Silicon designer
  • Regulators
  • TDP - Total Dissipated Power
  • Core rail - 200A over short timelines (!)
  • Intel proprietary bus is called SVID
  • Multi-phase regulators can have up to 8 buck converters in line
  • Slewing current is still limited to V = L * dI/dt
  • AMD processors have proprietary buses called SVI2 or SVI3
  • Many of these chips provide telemetry (temperatures at various points, current draw, etc)
  • Carmen doesn't want to make 12 layer eval boards because most customers wouldn't be able to implement that sort of thing
  • Taller inductors are better
  • Processors throttling themselves
  • Battery upstream
  • Parasitics
  • DrMOS
  • Driver is needed to drive MOS with significant current
  • Voltage vs current mode control
  • "Virus mode" is a stress test that Intel specs
  • Performance tuning with digital
  • PMBus
  • App notes
  • People Carmen follows on Signal Integrity Journal
    • Steve Sandler
    • Eric Bogatin
    • Istvan Novak
    • Past training materials that are easy to find
      • SLVA882B - Multiphase Buck Design From Start to Finish (Part 1)
      • Power Supply Design Seminar
      • Voltage regulator design and optimization for high-current, fast-slew-rate load transients
      • Carmen has been simulating using Cadence Sigrity
      • Connect with Carmen on LinkedIn
        • ...more
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        The Amp HourBy The Amp Hour (Chris Gammell and David L Jones)
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