| 摘要 |
PROBLEM TO BE SOLVED: To prevent excessive prolongation of time required for a bypass switch element to be turned on, when an output current of a voltage converter is in a state of exceeding a current threshold.SOLUTION: A vehicular power supply controller comprises: a first power storage part in which an upper limit voltage is set to a first voltage value; a second power storage part in which an upper limit voltage is set to a second voltage value higher than the first voltage value, and which can be charged/discharged faster than the first power storage part; and a control part which, when an output current of a voltage converter exceeds a predetermined current threshold in an OFF state of a bypass switch element, stops power generation of a power generator, and when a voltage of the second power storage part decreases to a predetermined transition voltage value close to the first voltage value, turns on the bypass switch element and resumes power generation of the power generator. When temperature of the first power storage part is not more than a first temperature threshold which is predetermined to be a value lower than normal temperature, the control part sets the upper limit voltage of the second power storage part to a third voltage value which is higher than the first voltage value and lower than the second voltage value.SELECTED DRAWING: Figure 1 |
