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Charge pump circuit and electronic device using it

A charge pump and circuit technology, applied in the field of circuits, can solve problems such as high driving voltage of power chips

Active Publication Date: 2020-06-05
SHANGHAI AWINIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as mentioned earlier, this requires a higher driving voltage to turn on the power DNMOS tube
[0003] Therefore, it is urgent to provide a technical solution to effectively solve the problem of selecting a smaller power tube and requiring a higher driving voltage when reducing the area and cost of the power chip.

Method used

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  • Charge pump circuit and electronic device using it
  • Charge pump circuit and electronic device using it
  • Charge pump circuit and electronic device using it

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Embodiment Construction

[0013] Implementing any technical solution of the embodiments of the present application does not necessarily need to achieve all the above advantages at the same time.

[0014] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the embodiments of the present application shall fall within the protection scope of the embodiments of the present application.

[0015] The specific implementation of the embodiment of the present application will be further described below in conjunct...

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PUM

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Abstract

The embodiment of the invention provides a charge pump circuit and an electronic device employing the same. The charge pump circuit comprises a first branch circuit, a first energy storage unit and adetection unit, wherein the first branch circuit comprises a plurality of first switching devices, and is used for enabling the first energy storage unit to be in a charged state through the switchingoperation cooperation of a plurality of switching devices. The detection unit is used for detecting the electric signals of detection ends in the first energy storage unit so as to at least change the switching operation cooperation of the plurality of switching devices, thereby enabling the voltage difference between the detection ends in the first energy storage unit to meet a preset electric signal threshold value, and enabling the output level of the charge pump circuit to be higher than a drive signal of a power voltage.

Description

technical field [0001] The embodiments of the present application relate to the field of circuit technology, and in particular, to a charge pump circuit and an electronic device using the same. Background technique [0002] In order to reduce the area and cost of the power chip without sacrificing the driving ability, there is a way to select the power transistor with the smallest possible size under the premise of the same on-resistance, and for this purpose, it is necessary to provide a higher The power supply voltage can make the power tube with smaller size turn on. For example, if the traditional power chip includes a power PMOS transistor, under the premise of having the same on-resistance, the size of the power NMOS transistor is much smaller, especially in more and more product applications that require class D power amplifiers and motors. When driving equal-power chips to achieve high voltage, large driving capability and lower cost, in the high-voltage DMOS proces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/07
CPCH02M3/07
Inventor 杨志飞张海军姚炜周佳宁杜黎明
Owner SHANGHAI AWINIC TECH CO LTD