May 2010

Doc ID 15906 Rev 1

1/18

UM0727

User manual

STEVAL-ISA018V1 demonstration board based on resonant

half-bridge SMPS for industrial applications

Introduction

This user manual describes a high efficiency solution for industrial power supplies with a

continuous output power of 150 W and peak power up to 240 W. It takes advantage of the

resonant approach to minimize switching losses, resulting in higher than 90% efficiency. The

topology is based on half-bridge and operated in a resonant fashion by means of a resonant

LC tank, driven by the L6599 dedicated controller.

voltage and constant current controller, providing square output regulation, while the

overload is managed by thermal protection (PTC) on the output rectifiers.

The board, shown in Figure 1, is obtainable using the order code STEVAL-ISA018V1.

Figure 1.

STEVAL-ISA018V1 board prototype

www.st.com