Vishay provides a recommended PCB layout and land pattern in their application note AN1026, which can be found on their website. It's essential to follow these guidelines to ensure proper thermal performance and reliability.
The datasheet recommends using a thermal interface material (TIM) with a thermal conductivity of at least 1 W/m-K. Apply a thin, even layer of TIM to the die attach surface, and ensure the TIM is compatible with the device and PCB materials.
Vishay recommends derating the voltage by 10% to 15% to ensure reliable operation and prevent premature failure. This means that for a 680V rated device, the maximum allowed voltage would be around 612V to 578V.
Follow the recommended soldering profile and use a solder with a melting point above 220°C. Ensure the PCB is clean and free of oxidation. Use a soldering iron with a fine tip and apply gentle pressure to avoid solder bridging.
Vishay provides reliability data in their datasheet, including FIT rates and MTBF calculations. The device is designed to meet or exceed industry standards for reliability and lifetime, but actual performance may vary depending on application conditions and quality of assembly.
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IDC7328ER680M Overview
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