Charging circuit

Abstract

A charging circuit comprises a charging circuit input end, a charging circuit output end and a main loop, a main switch tube, an inductor and a diode are sequentially connected in series on a positive pole line of the main loop, a positive pole end of the diode is connected with the inductor, and a negative pole end of the diode is connected with the output end of the charging circuit. A capacitor is electrically connected between the cathode end of the diode and the grounding wire of the main loop; and a control device is also arranged between the positive line of the main loop of the charging circuit and the grounding line of the main loop. The charging circuit provided by the invention has two functions of voltage boosting and voltage reducing at the same time, and can be switched between the voltage boosting function and the voltage reducing function as required.

Description

technical field [0001] The invention relates to a charging circuit. Background technique [0002] The boost circuit and the step-down circuit are two common charging circuits. In a charging circuit, the boost circuit and the step-down circuit are usually set independently. For example, a charging circuit with a boost circuit structure usually only has a boost function. A charging circuit with a step-down circuit structure usually only has a step-down function, and its function is usually relatively single. For a voltage stabilizing function that requires both a step-up function and a step-down function, a charging circuit usually cannot meet the use requirements. [0003] In order to overcome the defects of the above traditional charging circuit, the patent document of Chinese Patent No. ZL201921635496.4 discloses a voltage boosting circuit using a card reader. In this circuit, a voltage boosting circuit and a voltage reducing circuit are respectively provided. Voltage circ...

AI Technical Summary

Problems solved by technology

[0002] The boost circuit and the step-down circuit are two common charging circuits. In a charging circuit, the boost circuit and the step-down circuit are usually set independently. For example, a charging circuit with a boost circuit structure usually only has a boost function. A charging circuit with a step-down circuit structure usually only has a step-down function, and its function is usually relatively single. For occasions that require both a step-up function and a step-down function, a charging circuit usually cannot meet the requirements for use.

[0003] In order to overcome the defects of the above traditional charging circuit, the patent document of Chinese Patent No. ZL201921635496.4 discloses a voltage boosting circuit using a card reader. Voltage circuit, and then connect the two circuits to the power supply respectively, and output the boost power signal and the step-down power signal to the outside respectively; although the charging circuit structure has the functions of boosting and stepping down at the same time, it ensures the stability of the power supply voltage , to realize the stable switching of high and low voltages, but the structure of the charging circuit simply integrates the traditional boost circuit and step-down circuit into the same circuit, and the structure of the boost circuit and step-down circuit itself is not too big Changes, the boost circuit and the step-down circuit also work independently, and cannot quickly and orderly switch between the boost and step-down functions according to needs; and its structure is complex and the cost is relatively high

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