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An open-loop charge pump circuit for increasing output voltage ripple frequency

A technology of output voltage ripple and output voltage, applied in the field of open-loop charge pump circuit, can solve the problems of low ripple frequency and low sound quality, and achieve the effect of solving the problem of low sound quality and flexible and convenient setting.

Inactive Publication Date: 2017-09-26
WILL SEMICON (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the above problems, the present invention aims to provide an open-loop charge pump circuit that increases the frequency of the output voltage ripple, which adds an output voltage ripple detection and control module on the basis of the original open-loop charge pump circuit to solve the problem of Problems such as sound quality reduction caused by low output voltage ripple frequency

Method used

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  • An open-loop charge pump circuit for increasing output voltage ripple frequency
  • An open-loop charge pump circuit for increasing output voltage ripple frequency
  • An open-loop charge pump circuit for increasing output voltage ripple frequency

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Embodiment Construction

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other accompanying drawings based on these drawings and obtain other implementations.

[0046] Such as image 3 Shown is the open-loop charge pump circuit provided by the present invention. It can be seen from the figure that the open-loop charge pump circuit includes: an overvoltage protection signal generation module 100, a working clock generation module 200, and a boost control signal generation module 300. , boost module 400 and output voltage ripple detection and control module 500, wherein, the input end of the overvoltage protection signal generation module 1...

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Abstract

The present invention provides an open-loop charge pump circuit for increasing output voltage ripple frequency, comprising: overvoltage protection signal generation module, working clock generation module, boost control signal generation module, boost module, and output voltage ripple detection And the control module, wherein, the input end of the overvoltage protection signal generation module is connected with the output end of the boost module, and the output end is connected with the input end of the boost control signal generation module; the output end of the working clock generation module is connected with the boost control signal The input end of the generation module is connected; the output end of the boost control signal generation module is connected to the input end of the boost module; the input end of the output voltage ripple detection and control module is connected to the output end of the overvoltage protection signal generation module, and the output end Connected to the output terminal of the boost module, it adds an output voltage ripple detection and control module on the basis of the original open-loop charge pump circuit to solve the problem of sound quality degradation caused by the output voltage ripple frequency being too low.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to an open-loop charge pump circuit. Background technique [0002] The charge pump boost circuit is the most common DC-DC (Direct Current, direct current) boost power supply circuit for portable electronic devices. Compared with the inductive Boost boost circuit, the EMI (Electro Magnetic Interference, electromagnetic interference) of the charge pump boost circuit ) has better performance, which uses a boosted pump capacitor to store energy, and controls the charging / discharging of the boosted pump capacitor through the control circuit to achieve boosting and transfer the energy to output. [0003] Generally speaking, the charge pump booster circuit is divided into a closed-loop charge pump circuit and an open-loop charge pump circuit. The closed-loop charge pump circuit outputs a constant output voltage slightly lower than the boost multiple through loop control, while ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/07
Inventor 张振浩余维学仲志华尹辉胡颖余维科
Owner WILL SEMICON (SHANGHAI) CO LTD
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