ST AN2384 Application note

1 Introduction

Generally speaking, the resonant circuit of a resonant converter consists of a capacitor, an
inductor, and resistance. Two types of resonant converters are generally used: a series
resonant circuit and a parallel resonant circuit.

The Induction Cooking evaluation board has been provided with a series resonant circuit.
The component L is the cooking element itself.

AN2384

Applica t ion note

How to size the resonant tank

of the Induction Cooking Evaluation Board

September 2006 Rev 1 1/10

www.st.com

Contents

How to size the resonant tank of the Induction Cooking Evaluation Board

Contents

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2 The resonant converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3 The half bridge driver configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4 References and related materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

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How to size the resonant tank of the Induction Cooking Evaluation Board

List of figures

List of figures

Figure 1. The series resonant circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 2. The resonant curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 3. The power stage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

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