Vehicle control device
AssigneeHitachi Automotive Systems, Ltd.
InventorItaru TANABE
Life of this patent
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Abstract
Provided is a vehicle control device comprising a plurality of constant voltage generation circuits, wherein a specified voltage is supplied to a load even if any one of the constant voltage generation circuits outputs a voltage that exceeds the specified voltage. This vehicle control device is provided with a first and second constant voltage generation circuit that each output a voltage to a load, and when either the first or second constant voltage generation circuit outputs a voltage that exceeds a reference voltage, cuts off the output of that constant voltage generation circuit from the load.
Claims9
A vehicle control device that controls an operation of a vehicle, the vehicle control device comprising:
- a first and a second constant voltage generation circuits that each output a constant voltage to a circuit that performs processing to control the operation of the vehicle;
- a first high voltage detection circuit that detects that the first constant voltage generation circuit has outputted a voltage equal to or more than a first reference voltage;
- a second high voltage detection circuit that detects that the second constant voltage generation circuit has outputted a voltage equal to or more than a second reference voltage;
- a first switch that is arranged between the circuit and the first constant voltage generation circuit, and cuts off a voltage output to the circuit from the first constant voltage generation circuit when the first high voltage detection circuit detects that the first constant voltage generation circuit has outputted a voltage equal to or more than the first reference voltage;
- a second switch that is arranged between the circuit and the second constant voltage generation circuit, and cuts off a voltage output to the circuit from the second constant voltage generation circuit when the second high voltage detection circuit detects that the second constant voltage generation circuit has outputted a voltage equal to or more than the second reference voltage;
- and
- an output circuit that outputs any larger one of an output voltage of the first switch and an output voltage of the second switch, to the circuit, wherein
- the first reference voltage is larger than a rated voltage of the first constant voltage generation circuit, and
- the second reference voltage is larger than a rated voltage of the second constant voltage generation circuit.
Dependencies are inferred from the claim text.