SEOUL, March 30 : South Korea's Rebellions said on Monday it had raised $400 million in its latest funding round, valuing the artificial intelligence chip startup at about $2.34 billion as it accelerates expansion into the U.S. Rebellions said the round, led by Mirae Asset Financial Group and the Korea National Growth Fund, follows a $250 million Series C in September and brings its total capital raised to $850 million. Rebellions said it was entering a new phase of growth, focused on expanding