| 摘要 |
A standby power consumption control circuit, comprising a main power supply, a transformer, a first switch transistor, a load, a low frequency voltage divider circuit, and a device system; the transformer is connected respectively to the main power supply and a drain electrode of the first switch transistor, and is also connected to one end of the device system and to a voltage input end of the low frequency voltage divider circuit; the device system is used for, on the basis of the operating mode, sending a power level signal to the low frequency voltage divider circuit and acquiring the power supply voltage of the transformer; the power level signal comprises a normal mode low power level and a standby mode high power level; an output end of the low frequency voltage divider circuit is connected to a gate electrode of the first switch transistor, and is used for dividing the acquired power supply voltage on the basis of the power level signal and determining the frequency of an output signal; a second frequency of the low power level is greater than a first frequency of the high power level; a source electrode of the first switch transistor is connected to the load, and is used for acquiring the frequency of the output signal to be the working frequency, and controlling the conduction time of the transformer. The power supply voltage in the standby mode is thereby reduced, decreasing the standby power consumption of a household electrical device. |
