Abstract: A first power source line disposed between a positive electrode side of an electricity storage unit and a first external terminal, a second power source line disposed between a negative electrode side of the electricity storage unit and a second external terminal, a power source circuit connected to both the first and second power source lines and configured to supply an output voltage to a control circuit in an operating state, a power source control circuit configured to control an operating state and a non-operating state of the power source circuit, a first control signal generation circuit configured to supply a first control signal corresponding to transition of an external voltage applied to the first external terminal and the second external terminal to the power source control circuit to set the power source circuit in an operating state for a prescribed time, and a second control signal generation circuit configured to generate a second control signal that allows the power source circuit to be set i

Abstract: There is provided a power supply circuit including a first series regulator including a first semiconductor element and a first constant voltage source, and a second series regulator including a second semiconductor element and a second constant voltage source, wherein the first series regulator and the second series regulator are cascaded and an input voltage to the first series regulator is a high voltage equal to or greater than 500 V.

Abstract: A first power source line disposed between a positive electrode side of an electricity storage unit and a first external terminal, a second power source line disposed between a negative electrode side of the electricity storage unit and a second external terminal, a power source circuit connected to both the first and second power source lines and configured to supply an output voltage to a control circuit in an operating state, a power source control circuit configured to control an operating state and a non-operating state of the power source circuit, a first control signal generation circuit configured to supply a first control signal corresponding to transition of an external voltage applied to the first external terminal and the second external terminal to the power source control circuit to set the power source circuit in an operating state for a prescribed time, and a second control signal generation circuit configured to generate a second control signal that allows the power source circuit to be set i

Abstract: There is provided a power supply circuit including a first series regulator including a first semiconductor element and a first constant voltage source, and a second series regulator including a second semiconductor element and a second constant voltage source, wherein the first series regulator and the second series regulator are cascaded and an input voltage to the first series regulator is a high voltage equal to or greater than 500 V.