Current increasing and voltage stabilizing circuit with current limiting function

Abstract

The invention relates to a current increasing and voltage stabilizing circuit with a current limiting function, comprising a current increasing unit used for increasing and outputting a current, a current limiting unit used for limiting overlarge current output by the current increasing unit and a voltage stabilizing unit used for supplying stable output voltage to voltage output by the current increasing unit and the current limiting unit, wherein the input end of the current increasing unit is electrically connected with a power input end of the current increasing and voltage stabilizing circuit, the output end of the current increasing unit is connected with the input end of the current limiting unit, the output end of the current limiting unit is electrically connected with the output end of the voltage stabilizing unit, and the point in which the output end of the current limiting unit is electrically connected with the output end of the voltage stabilizing unit is electrically connected with the power input end of the current increasing and voltage stabilizing circuit. The current increasing and voltage stabilizing circuit with the current limiting function limits the current of the current increasing and voltage stabilizing circuit by adopting the current limiting unit and the voltage stabilizing unit, thereby avoiding that the current is too large to damage the voltage stabilizing unit.

Description

【Technical field】

[0001] The invention relates to the field of electronic circuits, in particular to a current increasing and voltage stabilizing circuit with a current limiting function. 【Background technique】

[0002] At the current stage, the voltage of the power supply used by many electrical products is lower than the mains voltage. At this time, it is necessary to adopt a step-down circuit design to provide a suitable power supply for the load. At present, when designing a step-down circuit, a three-terminal voltage stabilizing circuit is generally used, which is simple and applicable.

[0003] However, after the current is increased by using the three-terminal voltage stabilizing circuit, the transistor or the voltage stabilizing device is often damaged due to excessive current. 【Content of invention】

[0004] Based on this, it is necessary to provide a current increasing and voltage stabilizing circuit with a current limiting function that can limit excessive cur...

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