Electric power voltage stabilizer outputting constant voltage

Abstract

The invention discloses a power regulator with constant voltage output, which comprises: a voltage stabilizing circuit module for receiving an input voltage, stabilizing the input voltage within a preset voltage range, and outputting a stabilizing voltage within the preset voltage range; a voltage buffer module coupled with the voltage stabilizing circuit for buffering the input stabilizing voltage and outputting the stabilizing voltage into the next grade circuit, wherein, the voltage buffer module stops the current of next grade circuit from flowing into the voltage stabilizing circuit module. By utilizing the voltage buffer module, the invention isolates the voltage stabilizing circuit module from load, avoids the load effect from influencing the output voltage of the voltage stabilizing circuit module; in addition, the voltage buffer module further stops current of the load from flowing into the voltage stabilizing circuit module, so as to further improve the output precision of the power regulator.

Description

technical field [0001] The invention relates to a power regulator (regulator) circuit, in particular to a constant voltage output power regulator. Background technique [0002] With the development of electronic technology, an electronic system includes functional circuits of various sizes (for example, rectification, filtering, voltage transformation, voltage stabilization, signal conversion or signal amplification, etc.), in order to make the electronic system Normal operation needs to be realized through power management, and the main purpose of power management is to control and maintain proper current and voltage supply in the electronic system at any time under different operating states of the electronic system. [0003] The power management circuit can be divided into power regulator (regulator), battery charging / measurement, hot swap, voltage monitoring and other types. Among them, the power regulator is mainly used when the voltage of the power supply and the load ...

AI Technical Summary

Problems solved by technology

[0005] Although the above patent application has been able to adjust the pulse modulation frequency of the pulse width modulation circuit according to the change of the load current, so as to reduce power consumption and improve the voltage regulation efficiency, the above control circuit is only applicable to the stable pulse width modulation circuit. transformer, there are still limitations in the range of circuit applications

[0006] Therefore, when the load current changes, the current of the power regulator circuit of the previous stage will be affected, so there will be a problem that the output voltage of the power regulator circuit is affected by the load effect and is inaccurate.

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