The Google and Nihon-backed power conversion technology producer has now raised almost $230m in total, after securing $70m in a KKR-led round.

Transphorm, the US-based power conversion technology provider backed by semiconductor producer Nihon and diversified internet company Google, secured $70m in funding today in a round led by investment firm KKR.

Founded in 2007, Transphorm manufactures power conversion devices and modules using gallium nitride (GaN) semiconductor technology for use in products such as motor drives, electric vehicles and solar panels. It did not disclose the identity of any other investors in the round.

The company has now raised approximately $228m in…

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