| 摘要 |
PURPOSE:To prevent erroneous function of a load by a constitution wherein a control IC output a significant signal upon drop of power supply voltage when conduction control of the load is performed by means of the control IC. CONSTITUTION:A power supply voltage monitoring section 38 continuously monitors fluctuation of power supply voltage Vs and delivers a significant control signal S1 to a load conducting section 40 during an interval when the monitored power supply voltage Vs exceeds a set level. When provision of the control signal S1 is interrupted due to drop of the power supply voltage Vs, the load conducting section 40 turns a common conduction line 52 for a load 12 OFF. |
