DEVICE AND METHOD FOR CONTROLLING INSULATION SWITCH

摘要

An apparatus and a method for controlling an isolated switch are disclosed. The apparatus and the method for controlling an isolated switch according to the present invention, configure a circuit so as to maintain a light emitting diode (LED) included in an isolated switch in an OFF state at normal times and control the LED in an ON state when an event occurs in an isolated switch such as a photo MOS relay to reduce power consumed for emitting the LED by decreasing a duration for which the LED is maintained in an emission state and improve durability of a system adopting the isolated switch by improving a life-span of the isolated switch.

主权项

1. An apparatus for controlling an isolated switch, the apparatus comprising:
a first current source; an event signal generating unit generating a high signal at normal times and generating a low signal when an event occurs; a transistor switch connected with the first current source and the event signal generating unit and being in an off state when receiving the high signal from the event signal generating unit and being in an on state when receiving the low signal; an isolated switch having an input terminal connected with the transistor switch and being maintained in the off state when current does not flow on the input terminal and then, being in the on state when current from the first current source flows on the input terminal as the transistor switch becomes in the on state; and a contact control unit connected to an output terminal of the isolated switch, and maintaining a contact of a load in the on state when the isolated switch is in the off state and controlling the contact of the load in the off state as the isolated switch becomes in the on state.