CONTROLLER FOR DRIVING BRUSHLESS MOTOR

摘要

A low voltage off circuit (9) outputs a control signal for stopping the current to a brushless motor (1) driven by an output circuit (5) when even if the power supply voltage is too low to ensure normal operation of an output control circuit (6) but is above a predetermined voltage. If the circuit (6) is in an unstable operation because the power supply voltage is low, the switching element of the circuit (5) is reliably kept off by the circuit (9).