Power Integrations (NASDAQ:POWI) reported quarterly earnings of $0.31 per share which beat the analyst consensus estimate of $0.28 by 10.71 percent. This is a 72.22 percent increase over earnings of $0.18 per share from the same period last year. The company reported quarterly sales of $105.53 million which beat the analyst consensus estimate of $105.37 million by 0.15 percent. This is a 15.10 percent increase over sales of $91.69 million the same period last year.