Resistance-capacitance step-down circuit and electronic switch

Abstract

The invention provides a resistance-capacitance step-down circuit and an electronic switch, and relates to the field of resistance-capacitance step-down circuits. The resistance-capacitance step-down circuit comprises a step-down module, a voltage stabilizing module and a filtering module, the voltage stabilizing module comprises a bias assembly, a first voltage stabilizing diode and a first switching tube, the input end of the bias assembly is connected with the output end of the step-down module, and the first output end of the bias assembly is connected with a first port of the first switching tube; the second output end of the bias assembly is connected with the negative electrode of the first voltage stabilizing diode and the second port of the first switching tube, the third port of the first switching tube is connected with the filtering module, the positive electrode of the first voltage stabilizing diode is grounded, and the bias assembly is further used for limiting the current of the voltage stabilizing module. According to the technical scheme, a traditional voltage stabilizing diode is replaced with the voltage stabilizing module, the problem that the standby power consumption of a traditional resistance-capacitance voltage reducing circuit is large can be solved, and meanwhile the voltage stabilizing module can be suitable for application scenes with large circuit load current.

Description

technical field [0001] The invention relates to the field of resistance-capacitance step-down circuits, in particular to a resistance-capacitance step-down circuit and an electronic switch. Background technique [0002] At present, the resistor-capacitor step-down circuit is one of our commonly used power supply methods. It has the advantages of simple structure and low circuit cost. Since the resistor-capacitor step-down circuit has a power supply characteristic similar to constant current, it is generally used in applications with low power consumption. In the power supply circuit, such as small appliances, LED lights and other circuits. [0003] The traditional RC step-down circuit mainly adopts a capacitive step-down circuit, which provides current for electrical appliances through step-down capacitors, rectifier diodes, and Zener diodes. However, the existing RC step-down circuit consumes a lot of standby power and wastes power resources. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0003] The traditional RC step-down circuit mainly adopts a capacitive step-down circuit, which provides current for electrical appliances through step-down capacitors, rectifier diodes and Zener diodes. However, the existing RC step-down circuit consumes a lot of standby power and wastes power resources.

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