Monday, July 15, 2024

Efficient Solid-State Isolators For Improved Circuit Switching

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Utilising coreless transformer technology, iSSI devices offer a 20-fold increase in energy transfer and up to 70% lower power dissipation, making them ideal for applications in battery management, energy storage, and automation systems.

Infineon Technologies AG has unveiled a product family of Solid-State Isolators (iSSI) that revolutionises circuit switching by offering faster and more reliable performance with advanced protection features. Unlike traditional optical-based solid-state relays (SSR), iSSI employs coreless transformer technology, enabling a remarkable 20-fold increase in energy transfer. This technology also incorporates current and temperature protection, enhancing the overall reliability and reducing the cost of ownership.

The iSSI devices are designed to drive the gates of the company’s MOS-controlled power transistors, OptiMOSTM and CoolMOSTM, significantly reducing power dissipation by up to 70% compared to conventional solid-state relays that use SCR (silicon-controlled rectifier) and Triac switches. This makes iSSI an ideal solution for applications requiring efficient power management. The key features include:

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  • The isolators can customise solid-state relays for controlling loads exceeding 1000 V and 100 A.
  • Superior performance and reliability are provided by coreless transformer technology.
  • Ideal for advanced battery management, energy storage, renewable energy systems, and industrial and building automation system applications.

Engineers can leverage iSSI drivers further to enhance the efficiency of electronic and electromechanical systems. When paired with a CoolMOS S7 switch, iSSI drivers enable switching designs with much lower resistance than optically driven solid-state solutions. This results in longer lifespans and lower cost of ownership in system designs. Additionally, solid-state isolators offer superior performance compared to electromagnetic relays, including 40% lower turn-on power and increased reliability due to the elimination of moving parts. The iSSI family of devices is designed to be compatible with the company’s broad switching portfolio, including CoolMOS S7, OptiMOSTM, and linear FET portfolios, providing engineers with versatile and efficient solutions for their power management needs.

Davide Giacomini, Marketing Director for the Green Industrial Power Division at Infineon Technologies, highlighted the significance of this innovation: “Implementing coreless transformers in solid-state isolators and relays is a game-changer for power engineers; it provides 50 times lower RDS(on) than existing optically controlled solutions, enabling their use in higher-voltage and higher-power applications.”

Akanksha Gaur
Akanksha Gaur
Akanksha Sondhi Gaur is a journalist at EFY. She has a German patent and brings a robust blend of 7 years of industrial & academic prowess to the table. Passionate about electronics, she has penned numerous research papers showcasing her expertise and keen insight.

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