Solid-state isolators deliver fast, power-efficient switching
Infineon's new solid-state isolators are said to achieve faster and more reliable circuit switching with protection features not available in optical-based solid state relays (SSR).
The isolators use coreless-transformer technology and support 20 times greater energy transfer with both current and temperature protection contributing to a higher reliability and lower cost of ownership. The new solid-state isolators allow driving the gates of Infineon’s MOS-controlled power transistors OptiMOS and CoolMOS to reduce power dissipation of up to 70 percent of todays’ solid-state relays using SCR (silicon-controlled rectifier) and Triac switches.
“Implementing coreless transformers in solid-state isolators and relays is truly a game-changer for power engineers; it provides 50 times lower RDS (on) than existing optically controlled solutions. This enables their use in higher-voltage and higher power applications,” said Davide Giacomini, marketing director for the Green Industrial Power Division at Infineon Technologies.
According to Infineon, the solid-state isolators enable custom solid-state relays capable of controlling loads more than 1000 V and 100 A. Improved performance and reliability make coreless transformer technology suitable for applications in advanced battery management, energy storage, renewable energy systems, as well as industrial and building automation system applications.
When matched with Infineon’s CoolMOS S7 switch, the isolator drivers enable switching designs with a much lower resistance compared to optically driven solid-state solutions. This translates to longer lifespans and lower cost of ownership in system designs.
The family of devices is designed to be compatible with Infineon’s broad switching portfolio including Infineon’s CoolMOS S7, OptiMOS and linear FET portfolios.
