72 DESIGN007 MAGAZINE I AUGUST 2022
IR drop analysis with DC analysis, which only
works with uniform temperature. Melika also
points out the differences between typical
thermal simulation and the solver's electro-
thermal co-simulation.
Karthik then takes over, demonstrating
electrothermal co-simulation by importing an
entire CAD file into the Celsius environment.
He utilizes PowerTree technology to orga-
nize heat sources and heat sinks—definitions,
model names, target impedance constraints,
etc. He places probes at different points on
the PCB and tracks the transient results of
components across various points of time.
He shows how to trace power loss across
each layer across time, and changes in power
distribution as well. e 3D modeling capa-
bility depicts any potential hot spots on the
board.
To illustrate how this PCB would operate in
the real world, Karthik switches to the CFD
analysis environment and places the design
inside an enclosure. He adds a heat sink to one
of the thermally problematic packages, and a
cooling fan on the side of the enclosure, then
traces the cooling flow across the component
and board. Karthik closed with examples of the
more comprehensive results attained through
transient electrothermal co-simulation vs. tra-
ditional steady state analysis.
e Celsius ermal Solver continues the
"shi le" of signal integrity horsepower into
the front end of the design cycle, and it offers
functionality that will appeal to electrical
and mechanical engineers. Maybe EEs and
MEs will eventually speak the same language
aer all.
Melika and Karthik pack quite a bit into
this half-hour webinar. If you're dealing with
ther mal chal lenge s in your high-sp eed
PCB designs, you'll want to check out the
Ca d e n c eT E CH TA L K , " Ho w Sta t i c a n d
Dynamic IR Drop Analysis Can Help PCB
Designs and Challenges."
Watch now! DESIGN007
Related content:
• Shift Left: Moving Multiphysics into the
Mainstream
• The System Designer's Guide to...
System Analysis: Electromagnetic Interference
and Thermal Analysis of Electronic Systems
by Brad Griffin
• The Cadence System Design Solutions Guide
• "Cadence Provides 'Clarity' in Design Tool,"
Interview with Brad Griffin, Design007
Magazine, (July 2022)
