摘要:
An electrical control unit for an automobile of which standby current is smaller. In an electrical control unit for an automobile having a microcomputer, an input circuit, a driver circuit, and a power supply circuit, which is started by a wake-up signal from the circuit other than the ignition switch even when the ignition switch of the automobile is cut off, the microcomputer is started by shifting the power supply circuit from an inert state to an active state to generate the voltage for operating the microcomputer, and the predetermined processing is executed.
摘要:
The present invention relates to a method and apparatus for monitoring a status of nodes of a communication network. The method determines first node status data at a first node by diagnosing the own status of the first node and the status of at least one second node, sends the first node status data to at least one second node, receives second node status data from at least one second node, and determines node status evaluation data at the first node based on the determined first node status data and the received second node status data. Furthermore, improvements are proposed for the sake of efficiency and/or robustness of the method.
摘要:
A power supply semiconductor IC includes: an output transistor connected between a voltage-input terminal and a voltage-output terminal; a control circuit that controls the output transistor based on a feedback voltage of an output voltage; a current-limit circuit that limits an output current of the output transistor such that the output current is not equal to or greater than a current limit; a first transistor constituting a current-mirror circuit with the output transistor; a short-circuit-fault detection circuit that detects a short circuit of the voltage-output terminal based on a voltage across a resistor connected in series to the first transistor; and a first output terminal that outputs a detection result of the short-circuit-fault detection circuit. The current limit is within a detection range of the short-circuit-fault detection circuit. The short-circuit-fault detection circuit detects a short circuit of the voltage-output terminal even while the current limit circuit limits the output current.
摘要:
A regulator circuit includes an output controlling transistor and a controller circuit. The output controlling transistor is connected between a voltage input terminal and an output terminal. The controller circuit includes an error amplifier circuit which controls the output controlling transistor according to an output feedback voltage. The error amplifier circuit includes a differential input stage, an output stage and a current increasing/decreasing circuit. The differential input stage includes input transistors and a current source. The output stage includes a current source and a transistor connected in series with the current source and amplifies a potential at one output node of the differential input stage. The current increasing/decreasing circuit includes an element having a temperature characteristic, and increases or decreases a current of the differential input stage or the current of the output stage according to the temperature characteristic.
摘要:
A power circuit includes an input terminal to which an input voltage is applied; a control element which generates an output voltage obtained by regulating the input voltage; an output terminal from which the output voltage is output; a discharge circuit which discharges by extracting an electric charge from the control element on a side of the output terminal; a drive circuit which generates a drive current for causing the discharge circuit to operate using power of the control element on the side of the input terminal; a detection circuit which detects the output voltage; and a discharge control circuit which decreases a current value of the drive current to a current value enabling the discharge circuit to continuously operate in a case where the detection circuit detects that the output voltage reaches a setup voltage by an operation of the discharge circuit.
摘要:
In a vehicle control system in which a large number of ECUs operate in coordination via a network, each node has an intra-network node status determination section, other node's status decision transmitting/other nodes' status decision receiving section, and failed-node identification section. The nodes exchange decisions made by the intra-network node status evaluation section with other nodes and thereby identify failed node.
摘要:
The present invention relates to a method and apparatus for monitoring a status of nodes of a communication network. The method determines first node status data at a first node by diagnosing the own status of the first node and the status of at least one second node, sends the first node status data to at least one second node, receives second node status data from at least one second node, and determines node status evaluation data at the first node based on the determined first node status data and the received second node status data. Furthermore, improvements are proposed for the sake of efficiency and/or robustness of the method.
摘要:
A regulator includes a transistor connected between an input and an output. A feedback voltage controls the transistor to keep the output voltage constant. A first circuit functions as a comparator to compare a detection voltage from the output of the transistor and the feedback voltage when the output current is higher than a predetermined value, and functions as a buffer when the output current is lower than the predetermined value. A second circuit receives a reference voltage, the feedback voltage, and an output from the first circuit, and generates (i) a difference between the feedback voltage and the first circuit output when the reference voltage is lower than the first circuit output, and (ii) a difference voltage between the feedback voltage and the reference voltage when the reference voltage is higher than the first circuit output, and supplies a control voltage to control the output of the transistor.
摘要:
A power supply semiconductor integrated circuit includes an output transistor, a control circuit, a first-fault detection circuit, a second-fault detection circuit, a delay circuit, and a latch circuit. The output transistor is connected between a voltage-input terminal to which a DC voltage is input and a voltage-output terminal. The control circuit controls the output transistor. The first-fault detection circuit detects a first fault. The second-fault detection circuit detects a second fault different from the first fault. The delay circuit delays an output of the first-fault detection circuit and an output of the second-fault detection circuit. The latch circuit captures and holds an output of the delay circuit. The delay circuit includes: a constant current source for charging a delay capacitor; a discharge switch for discharging the delay capacitor; and a voltage comparator circuit that compares a charge voltage across the delay capacitor and a predetermined voltage.
摘要:
A current detecting circuit includes a first switching element, a second switching element, and a third switching element electrically coupled in series with the first switching element. An output side of the third switching element is electrically coupled to an output terminal. The current detecting circuit includes a current amplifier configured to detect a difference between a first output voltage of the first switching element and a second output voltage of the second switching element. The current amplifier outputs a relative current to be used for detecting an output current that flows out from the output terminal. A ratio of resistance associated with the first switching element to resistance associated with the second switching element is n:1.