Videos

MEASURING HIGH-PERFORMANCE POWER SUPPLY FEEDBACK LOOPS
Publish date: 20 oct 2013 // Published by: Dr. Ray Ridley

In this video, we demonstrate the low-frequency performance of the AP300 and show why you need large dynamic range and noise rejection for measuring high performance power supply control loops.

MEASURING HIGH-PERFORMANCE POWER SUPPLY FEEDBACK LOOPS
Publish date: 20 oct 2013 // Published by: Dr. Ray Ridley

In this video, we demonstrate the low-frequency performance of the AP300 and show why you need large dynamic range and noise rejection for measuring high performance power supply control loops.

Frequency Response Analysis for Power Supplies Part I - Why do you need it?
Publish date: 09 apr 2013 // Published by: Dr. Ray Ridley

In this first part of a series of videos on frequency response analysis, Dr. Ridley explains the need for frequency response analysis for switching power supplies. The high-noise environment means that time-domain waveforms are of very little use in solving stability problems.

Frequency Response Analysis Part II  What frequency range do you need?
Publish date: 23 apr 2013 // Published by: Dr. Ray Ridley

In this second part of a series of videos on frequency response analysis, Dr. Ridley shows the frequency range of testing needed to cover just about every power application. The range starts at below 1 Hz for power factor correction feedback loops, and extends above 10 MHz for magnetics characterization.

Frequency Response Analysis Part III  How much signal do you need?
Publish date: 29 apr 2013 // Published by: Dr. Ray Ridley

In this third part of a series of videos on frequency response analysis, Dr. Ridley shows the range of signal needed to inject into the loop of a power system. At low frequencies, with high gains, a 5 V signal often needs to be injected to overcome the noise issues. 

Frequency Response Analysis Part IV  Power Supply Loop Measurement
Publish date: 29 apr 2013 // Published by: Dr. Ray Ridley

In this fourth part of a series of videos on frequency response analysis, Dr. Ridley shows how to inject into the loop of a noisy switching power supply. Clean measurements are obtained with over 80 dB of gain at low frequencies.

Engineer It - How to test power supplies - Measuring Stability
Publish date: 26 march 2013 // texasinstruments

TI's Bob Hanrahan demonstrates how to measure stability when testing power supplies.