Electronic device
AssigneeAlps Alpine Co., Ltd.
InventorKazuhiko Kinemura
Life of this patent
Estimating the term…
Abstract
An electronic device includes: a plurality of loads, a switching element provided in a current path connected to the plurality of loads, a failure diagnosis unit that performs failure diagnosis according to voltages applied to the plurality of loads, and a driving circuit that drives the switching element. The driving circuit outputs, to the switching element, a driving control signal that represents a result of comparison between a load signal resulting from converting a current flowing in the current path to a voltage and a reference signal used as a reference for the operation of the switching element. If the failure diagnosis unit detects a voltage outside a normal voltage range, the failure diagnosis unit decides that the load is in an abnormal state.
Claims11
An electronic device comprising:
- a plurality of loads;
- a switching element provided in a current path connected to the plurality of loads;
- a failure diagnosis unit that performs failure diagnosis according to a voltage applied to the plurality of loads;
- and
- a driving circuit that drives the switching element, wherein
- the driving circuit outputs, to the switching element, a driving control signal that represents a result of comparison between a load signal resulting from converting a current flowing in the current path to a voltage and a reference signal used as a reference for an operation of the switching element,
- the driving control signal is generated only in a failure diagnosis mode in which the reference signal is set as a predetermined diagnostic voltage that is applied to the plurality of loads, and the predetermined diagnostic voltage is lower than an operating voltage of the plurality of loads, and
- when the failure diagnosis unit detects a voltage outside a normal voltage range, the failure diagnosis unit decides that the plurality of loads are in an abnormal state.
An electronic device comprising:
- a load;
- a switching element provided in a current path connected to the load;
- a failure diagnosis unit that performs failure diagnosis according to a voltage applied to the load;
- and
- a driving circuit that drives the switching element, wherein
- the driving circuit outputs, to the switching element, a driving control signal that represents a result of comparison between a load signal resulting from converting a current flowing in the current path to a voltage and a reference signal used as a reference for an operation of the switching element,
- the driving control signal is generated only in a failure diagnosis mode in which the reference signal is set as a predetermined diagnostic voltage that is applied to the load, and the predetermined diagnostic voltage is lower than an operating voltage of the load, and
- when the failure diagnosis unit detects a voltage outside a normal voltage range, the failure diagnosis unit decides that the load is in an abnormal state.
Dependencies are inferred from the claim text.