Power Supply Tutorial

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Welcome to this tutorial providing basic power supply knowledge for engineers, manufacturers, students, and interested hobbyists. Our desire is to foster understanding about electronic power supplies so that you may have success in energizing your products.

This tutorial will be a continual development with new topics added on a regular basis. For your convenience, we are providing a table of contents outlining the available topics for your reading. Topics shown are those presently planned. If the topic is not shown as linked, that topic is not developed yet.

Table of Contents

What is a Power Supply?

The Achille’s Heel of Electronics Products

Unregulated Supplies

Linear Supplies

Efficiency

Power Supply Capacitors and Inductors

Power Semiconductor Switches, Ideal Switches

Power Semiconductor Switches, Classification

Power Semiconductor Switches, PIN Diode, BJT, IGBT, Thyristor

Power Semiconductor Switches, MOSFETs and Schottky Diodes

Conduction Modes

The Isolated Power Supply

Topologies

Buck and Buck Derived Topologies

Buck

Forward

Two-Switch Forward

Push-Pull

Half-Bridge

Full-Bridge

Phase-Shifted Full-Bridge

Dual Active Bridge

Boost

Buck-Boost and Buck-Boost Derived Topologies

Buck-Boost

Flyback

Cuk

SEPIC

Inverse SEPIC (Zeta)

Non-Inverting Buck-Boost

Watkins-Johnson

Inverse Watkins-Johnson

Buck-Squared

Current-Fed Designs

Hard Switching

Soft Switching

Voltage Multiplication

Charge Pumps

Resonant Designs

Control Modes

Parasitic Elements

EMC

Power Factor Correction

Start Up Issues

Input Filter Output Oscillation

DV/DT Induced Turn-On