Switch Mode Power Supply Measurements and Analysis

Описание: Learn how to use an oscilloscope to debug your power supply!

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Keysight's Johnnie Hancock teaches how to use a digital storage oscilloscope or mixed signal oscilloscope to debug, characterize, and analyze your switching power supply. Learn basic tips and techniques for measuring, probing, and analyzing your designs.

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Agenda:

Power supply basics 1:35
linear power supplies vs switch mode power supplies

Switching power supply measurements overview 2:57
Switching power supply trends 3:57

Probe Deskew 4:36

Power supply measurments
-input line measurements and analysis 5:40
--Power quality 6:08
--Current harmonics 10:20
--Inrush current 12:20

-switching device analysis 13:40
--Switching losses 14:03
--Switching Phases 16:30
--Power Losses and Energy Losses 17:17
--Rds(on) 19:15
--Conduction and Toff Losses 21:02
--Vconduction measurement limitations 21:51
--Slew Rate 24:26
--Modulation 26:10

-Design Trade-offs 28:25

-output measurements 26:25
--Output Ripple 29:43
---Probing Limitations & techniques 31:15
--Turn on time & turn off time 37:05
--Transient Response Analysis 38:12
--Efficiency 39:42
--Power Supply Rejection Ration (PSRR) 40:45

Wrap up & review 46:36
Recommended probes & commonly used probes 47:27
Additional technical resources 49:23

Q&A 49:46

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Music by Lou Leaves the Room