Clock power supply circuit with power failure self-switching function, and control method thereof
A technology of clock circuit and power supply circuit, which is applied in the direction of circuit devices, electrical components, emergency power supply arrangement, etc., can solve the problems of consuming battery power and shortening battery service time, and achieve the effect of prolonging service time and ensuring reliability
Inactive Publication Date: 2019-06-11
ZHEJIANG WANMA NEW ENERGY
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Problems solved by technology
The disadvantage of the above clock power supply circuit is that when the input power supply is powered, it still consumes battery power, which greatly shortens the battery life
Method used
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Embodiment
[0017] Embodiment: a kind of power-down self-switching clock power supply circuit of this embodiment, such as figure 1 As shown, it includes a battery 4, an automatic on-off control circuit 1, an energy storage filter circuit 2, a status indication circuit 3 and a clock circuit 5. The positive pole of the battery 4 is connected to the input terminal of the automatic on-off control circuit 1, and the automatic on-off control circuit The output terminal of the clock circuit 5 is connected to the working voltage input pin VDD of the clock circuit, and the input power supply 6 and the energy storage filter circuit 2 are also respectively connected to the working voltage input pin VDD of the clock circuit. The automatic on-off control circuit 1 is also connected to the state indicating circuit 3 .
[0018] like figure 2 As shown, the automatic on-off control circuit includes a field effect transistor Q1, a resistor R1 and a diode D1; the status indication circuit includes a resis...
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The invention relates to a clock power supply circuit with a power failure self-switching function, and a control method thereof. The clock power supply circuit with the power failure self-switching function comprises a battery, an automatic on-off control circuit, an energy storage filtering circuit and a clock circuit, wherein the positive electrode of the battery is connected with the input endof the automatic on-off control circuit, and the output end of the automatic on-off control circuit is connected with a working voltage input pin VDD of the clock circuit; and the input power supplyand the energy storage filtering circuit are also connected with the working voltage input pin VDD of the clock circuit separately. According to a situation that whether the input power supply suffersfrom power failure or not, the automatic on-off control circuit is used for controlling the on-off of the battery power supply line, so that the battery is prevented from still consuming electric energy when the power supply is not needed, and the service life of the battery is further prolonged. Meanwhile, the energy storage filtering circuit is arranged, so that electric energy is provided forthe clock circuit during the process that the clock circuit is converted into the battery power supply mode from the input power supply mode, and the reliability of switching of the power supply of the clock circuit is ensured.
Description
technical field [0001] The invention relates to a clock power supply circuit, in particular to a clock power supply circuit and a control method thereof which are self-switching upon power failure. Background technique [0002] Existing clock power supply circuits are divided into two types: battery power supply and supercapacitor power supply in terms of power supply sources. When designing electrical equipment or instruments with a long service life, such as charging piles and electric meters, the average service life is about 10 years. The clock circuit powered by supercapacitors is subject to certain restrictions due to the influence of supercapacitor capacity, price, and high and low temperature environments. limit. Batteries are widely used in long-life devices due to their high energy density, moderate price, and good environmental adaptability. [0003] The existing clock power supply circuit is generally composed of a battery, two diodes and a capacitor. The posit...
Claims
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IPC IPC(8): H02J9/06
Inventor 海建伟康亮陈亮
Owner ZHEJIANG WANMA NEW ENERGY