## Course Info

This course introduces the basic concepts of switched-mode converter circuits for controlling and converting electrical power with high efficiency.

Principles of converter circuit analysis are introduced, and are developed for finding the steady state voltages, current, and efficiency of power converters.

Assignments include simulation of a dc-dc converter, analysis of an inverting dc-dc converter, and modeling and efficiency analysis of an electric vehicle system and of a USB power regulator.

## Objective:

- Understand what a switched-mode converter is and its basic operating principles;
- Be able to solve for the steady-state voltages and currents of step-down, step-up, inverting, and other power converters;
- Know how to derive an averaged equivalent circuit model and solve for the converter efficiency.

## Syllabus:

### Chapter 1- Introduction

– Introduction and administrative matters

– Achieving high efficiency by switched-mode power conversion

– Simulation of a buck converter using LTspice

– Homework assignment #1, Simulation of a boost converter

### Chapter 2- Principles of Steady State Analysis

– The techniques of inductor volt-second balance, capacitor charge balance, and the small ripple approximation, for finding the dc voltages and currents of converters operating in steady state

– Homework assignment #2, Analysis of a buck-boost converter

### Chapter 3- Steady-state equivalent circuit modeling, losses, and efficiency

– Modeling the ideal power conversion functions using the dc transformer model.

– Refinement of converter equivalent circuit models by incorporation of elements modeling conduction losses and other losses

– Homework assignment #3, Equivalent circuit models of two non ideal converters: a buck-boost USB power supply, and an electric vehicle dc-dc boost converter with bidirectional power flow