To provide a voltage output device capable of appropriately detecting a voltage of a power source when necessary while reducing the dark current of the power source.SOLUTION: A voltage output device 12 outputs a monitor voltage for measuring a voltage of a power source 3 to be monitored. The voltage output device 12 includes a voltage dividing circuit 12a and an auxiliary circuit 12b connected in parallel to the power source 3. The voltage dividing circuit 12a outputs the monitor voltage obtained by dividing the voltage of the power source 3. The auxiliary circuit 12b includes a resistor R21 and a switching element Tr connected in series to the resistor R21. The switching element Tr is turned on before outputting the monitor voltage from the voltage dividing circuit 12a. When the switching element Tr is turned on, a current larger than a current flowing in the voltage dividing circuit 12a flows into the auxiliary circuit 12b. Thus, the device can appropriately detect the voltage of the power source when necessary while reducing the dark current of the power source.SELECTED DRAWING: Figure 2
【課題】電源の暗電流を低減しつつ、必要なときに電源の電圧を適切に検出し得る電圧出力装置を提供する。【解決手段】電圧出力装置12は、モニター対象の電源3の電圧を測定するためのモニター電圧を出力する。電圧出力装置12は、電源3に対して並列接続された分圧回路12aと補助回路12bとを備える。分圧回路12aは、電源3の電圧を分割したモニター電圧を出力する。補助回路12bは、抵抗R21と、抵抗R21と直列接続されたスイッチング素子Trとを含む。スイッチング素子Trは分圧回路12aからモニター電圧を出力する以前にオン状態となる。スイッチング素子Trがオン状態となるとき、分圧回路12aに流れる電流よりも大きな電流が補助回路12bに流れる。これにより、電源の暗電流を低減しつつ、必要なときに電源の電圧を適切に検出することができる。【選択図】図2
VOLTAGE OUTPUT DEVICE
電圧出力装置
2021-02-12
Patent
Electronic Resource
Japanese
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
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