A supercapacitor charging and discharging circuit and electronic product having the same

Abstract

The invention provides a supercapacitor charging and discharging circuit and an electronic product having the same, and relates to the technical field of capacitor charging and discharging circuits, wherein the supercapacitor charging and discharging circuit includes: a charging circuit, a first discharging circuit, a second discharging circuit, and Control circuit; wherein, the charging circuit is used to charge the supercapacitor; the first discharge circuit is used to provide electric energy for the load; the second discharge circuit is controlled without affecting the operation of the charging circuit and the first discharge circuit. In the control circuit, the residual voltage on the supercapacitor is released. The simple structure of the supercapacitor charging and discharging circuit can solve the damage to the life and performance of the supercapacitor caused by electric energy stored in the supercapacitor for a long time, thereby improving the operation stability and service life of electronic products with the circuit.

Description

technical field [0001] The invention relates to the field of capacitor charging and discharging circuits, in particular to a supercapacitor charging and discharging circuit and electronic products having the same. Background technique [0002] In today's society, with the development of science and technology, supercapacitors are used more and more frequently in electronic products. They often exist as energy storage components. They generally use circuits, such as figure 1 As shown, C1 is a supercapacitor, and U1 is a boost power chip. When VCC is powered off, the voltage of C1 will gradually drop. When the voltage of C1 drops to a certain value, U1 will stop working. There will still be voltage. If the C1 voltage cannot be cleared in time, it will affect the life and performance of C1 after a long time. [0003] Therefore, there is an urgent need to provide a new technical solution to solve the impact on the service life and performance of the supercapacitor if the residu...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a supercapacitor charging and discharging circuit and electronic products with it. By designing the supercapacitor charging and discharging circuit, after the electronic product with the circuit starts the emergency power consumption program, the supercapacitor discharge work ends The last retained voltage can be released quickly, which solves the problem that the retained voltage in the supercapacitor cannot be released as soon as possible after the circuit stops working, which affects its life and performance.

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