Patent ID: 7492620
Filing Date: 2009-02-17
Classification: H02M,H05B,Y02B

Abstract:
1. A controller IC for controlling the ac power to be supplied to a load by driving a semiconductor switch circuit, said controller IC comprising: a first terminal for receiving a run-stop signal; a second terminal for receiving a signal based on current flowing in said load; a third terminal for outputting a signal to drive said semiconductor switch circuit; a control signal generation circuit for generating a control signal for controlling said semiconductor switch circuit based on a signal inputted from said second terminal; and a switch driving circuit receiving said control signal and said run-stop signal, said switch driving circuit adapted to provide said third terminal with a switch drive signal in accord with said control signal when said run-stop signal has a logical run-state instructing running; when said run-stop signal has a stop-state instructing stopping, provide said third terminal with a switch drive signal that turns off said semiconductor switch circuit.