Bosch said it plans to invest $1.5 billion to retool TSI's chip production facilities in Roseville, California to start producing silicon carbide chips by 2026.
Bosch said the TSI facility would become the "third pillar" of in-house semiconductor production, along with two sites in Germany.
The silicon carbide chips Bosch said it will manufacture at the TSI Roseville site are increasingly in demand by electric vehicle manufacturers.
U.S-based Wolfspeed Inc (WOLF.N) is building new plants to make silicon carbide chips in New York State and in Germany.
Bosch plans to acquire the buildings, machines and infrastructure of TSI as well as well as its commercial semiconductor business.