| 摘要 |
PURPOSE: To provide a dead time compensation circuit which detects the failure of a voltage detection circuit for detecting the state of the output voltage of a main circuit to be supplied to a load and at the same time transmits an output signal by switching from a dead time compensation output signal to a PWM command when the failure is detected. CONSTITUTION: A specific counting operation is made by a counter A12 while a PWM command U* and a dead time compensation output signal U' differ by obtaining the exclusive OR between the PWM command U* and the dead time compensation output signal U', an SR latch circuit A13 is set by detecting the failure of a voltage detection circuit due to the generation of the overflow signal of the counter A12, and at the same time a selection switch A14 is switched for changing from the dead time compensation output U' to the PWM command U*, thus outputting the PWM command U*. |
