Protect And Enhance High-Power Designs With Integrated Solid-State Isolators

Focus:

An integrated solid-state isolator (SSI) based on coreless transformer galvanic isolation provides many design benefits. Unlike optical-based solid-state relays (SSRs), an integrated SSI driver can provide the required isolation and energy transfer to ensure proper operation and extended life for high-power systems as well as several integrated protection features. In this 16-page article, the authors describe the features and characteristics of Infineon’s integrated SSI drivers and then present a series of examples demonstrating how these devices can be combined with power MOSFETs and other supporting components to replace conventional DIN-rail and panel-mount SSRs. The calculations and data required for selection of MOSFETs and other components, as well as calculation of leakage current, are presented. The SSI plus power MOSFETs designs are compared against the conventional SSRs they replace.

What you’ll learn:

• How to understand the benefits of Infineon’s integrated solid-state isolators versus conventional solid-state relays
• How to implement solid-state relays with galvanic isolation and protection features based on Infineon’s integrated solid-state isolators

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Author & Publication:

Davide Giacomini, Infineon Technologies, Pavia, Italy and Sameh Snene Infineon Technologies, Munich Germany, How2Power Today, Mar 14 2025

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