400W MSW DC-AC Inverter

This year long engagement resulted in a successful new product for a Tier 1 automotive client.

DC/AC inverters are used to convert automotive 12V into household AC. This project was taken over at proof of concept stage and delivered as a production hardware design. The design is a 400W modified sine wave inverter in 120/230 VAC output versions. The DCDC stage is semi-resonant and capable of supporting AC loads through start-stop events. Start-stop is an emerging feature designed to improve fuel economy by shutting off the vehicle’s internal combustion engine when it is at a stop. The challenge is that when the engine is automatically re-started, the system voltage can dip momentarily to as low as 6V. For standard push-pull DCDC topologies, this is too low to continue to provide AC output. Key challenges in this engagement: New topology simulation/tuning, major BOM cost reduction, control development, thermal management, and radiated/conducted emissions.

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DEB Associates helps companies through the entire electronics design process. Our team is smart, reliable, and deeply knowledgeable about the intricacies of circuit design, PCB layout, and EMC.

DEB Associates 2020