ルネサス、GaNスイッチで電力変換を簡素化

Renesas Electronics Corporation just dropped something that quietly fixes a very real engineering headache. A 650V bidirectional GaN switch that can handle current in both directions using a single device. Sounds simple. It is not. This replaces the usual back-to-back switches that inflate component count and drag efficiency down.

Right now, most power conversion setups, especially in solar microinverters and data centers, rely on multi-stage designs because traditional silicon and SiC switches only work one way. That forces engineers into workarounds. More components, more losses, more complexity.

This new GaN approach flips that. You get single-stage conversion with fewer switches, no need for intermediate DC links, and higher efficiency. Renesas is claiming over 97.5 percent in real microinverter setups, which is not trivial when margins are already tight.

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The bigger play sits in where this goes next. AI data centers, EV onboard chargers, and solar systems are all chasing higher power density with lower losses. GaN is already trending there. What ルネサス is doing is removing friction at the design level. Fewer parts, simpler control, standard drivers. That is how adoption actually scales.