Bode Plots and Stability of Power Supplies (Buck Converters)

Name: Bode Plots and Stability of Power Supplies (Buck Converters)
Rating: 3.3 (14 reviews)

Stability Analysis / Phase Cross Over Frequency Bode plot, stability, crossover frequency, phase margin, gain margin

Created bykayhan ince

Last updated 3/2026

English

What you'll learn

The Bode plot of a switching DC/DC converter
The phase margin of buck converter
A step load response of the converter
Phase margin, gain margin, and stability margin

Course content

2 sections • 5 lectures • 36m total length

Bode Plots and Stability of Power Supplies10:05
By the end of the article you should be very comfortable with the concepts of frequency domain analysis, Bode plots, gain margin, phase margin, cross over frequency and the power supply stability criteria.

Frequency Response Measurement4:52
In this video we will explain how to measure the loop, compensator and plant of our power supply using a vector network analyzer. The measurements are made by injecting a sinusoidal of varying frequency into the loop and measuring how this signal changed as it passed through the system.
Power Supply Compensators5:17
Using Transfer Functions8:36
In this video, transfer functions from first principles is discussed and how you can use them to analytically design a compensator for a power supply in order to meet the stability criteria.
Voltage Mode PSU Compensator Design8:06
In this video, stabilizing the buck converter with voltage-mode error amplifier is discussed. The goal is to highlight the advantage of this control scheme and illustrate how a high performance feedback loop that allows fast load transient response and accurate steady state output can be achieved.

Requirements

Power Electronics and DC-DC converters

Description

In this lecture, the concepts of frequency domain analysis, Bode plots, gain margin, phase margin, cross over frequency and the power supply stability criteria are explained.

Power supplies are mostly designed in the frequency domain to obtain a lot more information about the relative stability of the power supplies. In the time domain where the power supply is given a step load and looked at its transient response, the stability criteria are not investigated properly.

Who this course is for:

Electrical Engineering students, teaching staff and power electronics design engineers

Bode Plots and Stability of Power Supplies (Buck Converters)

What you'll learn

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Course content

The Bode plot of a switching DC/DC converter1 lecture • 10min

Introduction4 lectures • 27min

Requirements

Description

Who this course is for: