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Eletimes
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Securing EMI Resilience with Software-Driven Smart Electronic Fuses
- Integrated smart power devices are becoming increasingly crucial in automotive systems due to their ability to combine power management with advanced diagnostic and protection features.
- Electronic fuses, a prominent type of smart power device, are particularly remarkable for their reliability under harsh environmental conditions, including high operating temperatures and mechanical stress.
- To ensure the correct operation of electronic products, they need to be tested for electromagnetic emissions that may negatively affect nearby equipment.
- CISPR 25 is the standard developed for vehicles and boats to protect on-board receivers from such emissions.
- For CISPR 25, emission limits are divided into Class 1, 2, 3, 4, and 5 products, specifying how to measure the noise using peak, quasi-peak, and average detection methods.
- Conducted Electromagnetic Emission is the noise current generated by the EUT that propagates through the harness to other components/systems or power grid. This noise current can be measured using either the voltage method or the current method.
- The experimental data have been collected for the STi2Fuse product VNF9Q20F, which is a 4-channel monolithic electronic fuse fully programmable through serial peripheral interface (SPI).
- The EMI behavior of a smart electronic STi2Fuse device has been investigated, demonstrating compliance with the CISPR 25 standard under class 5 specifications.
- Compliance with the CISPR 25 standard, particularly under class 5 specifications, is essential for these devices to ensure they do not interfere with other components and equipment within the vehicle.
- The STi2Fuse products are critical components in modern vehicles, providing overcurrent protection and ensuring the safe operation of electrical circuits.
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