Patent ID: 9531261
Filing Date: 2016-12-27
CPC Classification: G05F,H02M,H03K

Claim Text:
1. A power-supply control device, comprising: a transistor that is interposed between a power source and a load; a control circuit to which a voltage from the power source is applied, the voltage being applied across a high-voltage side input terminal and a low-voltage side input terminal of the control circuit, and that is configured to turn the transistor on or off based on an operating signal for the load that is applied from an external device, and controlling supply of power to the load; a voltage detector that is configured to detect a value of the voltage applied to the control circuit by the power source, and is configured to determine whether or not the applied voltage value detected is lower than a predetermined voltage value; and a negative voltage output circuit that is configured to output a negative voltage to the low-voltage side input terminal of the control circuit if the voltage detector determines that the applied voltage value is lower than the predetermined voltage value.