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Charge pump circuit

A technology of charge pump and circuit, which is applied in the direction of electrical components, automatic power control, and conversion equipment without intermediate conversion to AC, and can solve the problem of large output voltage ripple of the charge pump.

Active Publication Date: 2021-09-14
CHANGXIN MEMORY TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a charge pump circuit that can reduce the ripple size of the output voltage of the charge pump circuit for the above-mentioned problem that the ripple of the output voltage of the charge pump circuit is relatively large

Method used

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Embodiment Construction

[0027] In order to better understand the purpose, technical solution and technical effect of the present invention, the present invention will be further explained below in conjunction with the accompanying drawings and embodiments. At the same time, it is stated that the embodiments described below are only used to explain the present invention, and are not intended to limit the present invention.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0029] In the case of using "comprising", "having", and "comprising" described herein, anot...

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Abstract

The invention discloses a charge pump circuit. The charge pump circuit comprises: a charge pump core circuit used for generating an output voltage; an oscillator used for providing a clock signal for the charge pump core circuit; and a feedback circuit used for controlling the oscillator according to the output voltage, and comprising an internal loop. The charge pump circuit has the advantages that the internal loop can dynamically adjust the sampling value of the voltage at the output end of the charge pump core circuit through the control signal output to the oscillator, so that the starting and closing time of the charge pump core circuit is adjusted, and the purpose of adjusting the output voltage ripple of the charge pump through the internal loop is achieved, thereby the ripple of the output voltage of the charge pump is reduced.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a charge pump circuit. Background technique [0002] Charge pump circuits are widely used in various electronic chips, such as memories, display drivers, and other electronic chips. A charge pump, also known as a switched capacitor voltage converter, is a type of converter that uses so-called "flying" or "pumping" capacitors to store energy. They can step up or down the input voltage and can also be used to generate negative voltages. Its internal switch array controls the charging and discharging of the flying capacitor in a certain way, so that the input voltage is multiplied or reduced by a certain factor, so as to obtain the required output voltage. Since the charge pump circuit is essentially a switching power supply, its output voltage will inevitably produce ripples. [0003] The output voltage ripple of the existing charge pump circuit is relatively large, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/07H02M1/14
CPCH02M3/07H02M1/14H02M1/088H02M1/0006H03L7/00H03L7/093
Inventor 许海宁
Owner CHANGXIN MEMORY TECH INC