Key Points

• Switched mode power supplies (SMPS) are more efficient than linear regulators.
• Capacitors and inductors play crucial roles in energy storage and voltage conversion.
• Different topologies of SMPS allow for various voltage outputs, including step-up and step-down.

Introduction

In this video, Christoph Maier discusses the fundamentals of switched mode power supplies (SMPS), highlighting their efficiency compared to linear voltage regulators. Learn more about linear regulators.

Efficiency of SMPS

• Linear regulators cannot increase output voltage beyond input voltage and are inefficient due to heat loss. Inefficiency explained.
• SMPS utilize energy storage elements like capacitors and inductors to improve efficiency. Energy transfer process.

Capacitors and Charge Pumps

• The video explains how charge pumps work using capacitors. Charge pump example.
• When two capacitors are connected, they equalize their charge, demonstrating energy transfer. Capacitor behavior.
• The concept of the capacitor paradox is introduced, explaining energy loss during charging. Capacitor paradox.

Inductors and Their Role

• Inductors also play a significant role in SMPS, with energy transfer occurring through magnetic fields. Inductor behavior.
• The video discusses the challenges of switching inductors, particularly the risk of voltage spikes. Inductor switching issues.

Switching Elements

• The importance of diodes and transistors, especially MOSFETs, in SMPS is covered. Switching elements overview.
• MOSFETs are preferred for their low voltage drop and high switching speeds, enhancing efficiency. MOSFET advantages.

Types of SMPS

• Various topologies of SMPS are introduced, including boost, buck, and inverter converters. Overview of topologies.
• The video concludes with a summary of how these elements work together to create efficient power supplies. Conclusion.