Patent ID: 9336976
Filing Date: 2016-05-10
CPC Classification: H01H

Claim Text:
1. A relay driving device for driving a relay, said relay driving device comprising: a first power supply module for outputting a first voltage that has a magnitude sufficient to activate the relay; a second power supply module for outputting a second voltage that has a magnitude lower than that of the first voltage and sufficient to maintain an activated state of the relay; a switching circuit coupled to said first and second power supply modules and to be coupled to the relay; and a control module coupled to said switching circuit and configured to control said switching circuit to connect the relay to said first power supply module and to disconnect the relay from said second power supply module so as to provide the first voltage to the relay for activating the relay, and to subsequently connect the relay to said second power supply module and to disconnect the relay from said first power supply module so as to provide the second voltage to the relay for maintaining the activated state of the relay; wherein said switching circuit includes a switching transistor for coupling said first power supply module to the relay, and a switching diode for coupling said second power supply module to the relay.