In 2011, Google Ventures invested $20 million into Transphorm. The money is to assist the companies development of power conversion technologies.[7][8] They also received capital from Kleiner Perkins and others amounting to $18 million.[8]
In September 2012, Transphorm released the TPH2006PS which was the first JEDEC qualified 600V HEMT in the industry.[9][10]
In November 2013, Transphorm teamed up with Fujitsu Semiconductor to integrate their GaN power devices into power supply businesses with Fujitsu as well as Fujitsu Semiconductor only taking minority equity positions.[11][12][13]
In 2015, they received a $70 million investment which was led by the global investment firm KKR.[14]
Transphorm went public by reversing merging with a special-purpose acquisition company, Peninsula Acquisition Corporation, in February 2020.[15][16] In August 2021, Transphorm acquired 100% interest in the AFSW wafer-fab facility from GaNovation, a manufacturer for high voltage GaNs.[17]
In March 2023, Transphorm released the first gallium nitride (GaN) System-in-Package (SiP) together with Weltrend Semiconductor Inc.. The Weltrend SiP will be showcased by Transphorm at the 2023 Applied Power Electronics Conference (APEC).[18][19]
Together with Yaskawa Electric, Transphorm has developed a new patented technology for GaN power transistors with a short circuit withstand time (SCWT) of 5 microseconds in August 2023.[20][21]
^Clark, Don (2013-11-28). "Fujitsu Reaches Deal With Transphorm". Wall Street Journal. Retrieved 2015-11-29. Transphorm Inc. said it would buy rival operations of Japan's Fujitsu Ltd. as the U.S. startup furthers its pursuit of new technology for saving energy in electronic products.
^Clark, Don (2015-06-22). "Energy-Saving Material Gets a Boost". Wall Street Journal. Retrieved 2015-11-29. [KKR] is using its own money to lead a $70 million funding round for the startup Transphorm Inc.