How To Simulate Your Power Supply | Explained by Benjamin Dannan

Setting up simulation of a power supply, comparing the results with real measurements and fixing the real power supply. Thank you very much Benjamin Dannan
DesignCon: www.designcon.com/
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Other Links:
- Ben's Linked In: / benjamin-dannan
- FEDEVEL courses: fedevel.com/courses
Link to book. Example workspaces can be downloaded from this link.
www.picotest.com/ADSBook.html
Link to my publication page:
www.signaledgesolutions.com/p...
Link to paper discussed from DesignCon 2023
cfb65d34-6a9f-4894-b3d1-0a0a8...
Link to slides presented:
cfb65d34-6a9f-4894-b3d1-0a0a8...
Link to video on my youTube channel showing how to do impedance measurements:
• 2-Port Shunt Through I...
Link to Picotest Probes
www.picotest.com/products_PDN...
Link to App Note to do 2-port impedance measurements with Picotest P2102A and Bode 100
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Link to where the ADS workspace that I presented can be downloaded using the TPS7H4003 VRM.
www.picotestonline.com/Design...
Chapters:
00:00 What is this video about
00:48 How power supply is simulated
03:59 About the regulator and our setup we used as an example
06:45 Model of power supply for simulation
09:25 Where to get parameters for the model
14:28 How to measure parameters for model and simulation
20:29 Explaining the blocks used in the simulation
28:28 What is inside of the power supply model main block
34:48 Transient vs. harmonics simulation
39:44 Running and results for a simulation without board effects
46:49 Comparing with real results and fixing the simulation
47:51 Adding real board effects into simulation of power supply
50:20 Simulating with board effects
52:15 Fixing the problem in power supply
1:01:19 What Ben does
1:01:48 DesignCon
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It is much appreciated. Thank you,
- Robert

[@acanadianbear6966]

Hi Robert! I would like to emphasize how much this stuff works and how easy it is. We actually modelled the same rad-hard power supply from TI, and also Renesas, using the same methodology that Ben uses. Of course, it is time consuming. But, if a dumb guy like me managed to do it, then anyone can. And if anyone is wondering, you can use LTSpice or any SPICE simulator you have access to. If anyone is curious, the fundemental principles of this modelling technique comes from the paper by Ridley, Ray. (1991). A New, Continuous-Time Model For Current-Mode Control.

[@maupaz92]

Great video! Always focused in real-life designs. Keep them coming.

[@Gengh13]

This is awesome, I need to learn more about this subject.

[@varbanmetodiev2552]

You may also make a video for multi-phase VRM/pulse power supply simulations in QSPICE (especially load transient analysis).

[@rfrisbee1]

I think an important point to mention is that super accurate simulations are only required when you are getting close to a performance or cost limitation. I.e. you are pushing the capability of the components or are trying to use the fewest/lowest cost components possible. For those of us who have to design entire systems in a reasonable time a more feasible approach is to use parts well within their performance capabilities and/or modules that have already been designed, such as the Analog Devices uModules.

[@pochuanpeng1729]

Hi Robert, could you also have a video that walks through how to extract PCB with ADS PIPRO?

[@pochuanpeng1729]

Thanks, what if we do not have access to COMP pin for some buck regulators? Or LDO? How to do the behavior model?

[@christopherjackson2157]

Its really hard to imagine Steve Sanders having a boss lol

[@lumianic]

Hi Robert, can you guys explain the theory of harmonic balance? How do this HB operate or work to simulate this result?

[@sigfreed11]

The part I dont get is that it seems that all these simulations of power supplies (and other components) are all done in conjunction with actual built hardware. That largely defeats the benefits of simulation, if you need the hardware measured… How can I accurately simulate and estimate the power supply BEFORE building any hardware?

[@udhayakumara4033]

ADS? I can't afford it. Not for me 😊

[@RobertFeranec]

I still found it very interesting 1) first to learn the concept of power supply simulation 2) to see how accurate the simulation can be. BTW: often these software companies are giving interesting discounts

[@robr8554]

Sadly ADS is expensive... can't afford it