High-conversion efficiency reconfigurable series-parallel switched capacitor voltage converter

Abstract

The invention relates to a high-conversion efficiency reconfigurable series-parallel switched capacitor voltage converter. The converter comprises N-1 control units through which the voltage conversion ratio of a second conversion end to a first conversion end can be 1: 1 to N: 1; when the voltage conversion ratio of the first conversion end to the second conversion end in the reconfigurable series-parallel switched capacitor voltage converter is Nx: 1, the N-1 control units are divided into k+1 sets of control modules, k control switch tubes are arranged to correspond to the first k sets of control modules respectively, wherein each set of control module in the first k sets of control modules comprises m control units, and the last set of control module comprises t control units, whereinm=Nx-1, and k and t meet the equation that N-1=m*k + t, and k and m are 0 or positive integers at the same time, and t is as small as possible. According to the converter of the invention, each devicein the circuit is utilized to the greatest extent, and high voltage conversion efficiency and low heat loss are achieved; in addition, a use scheme of carrying out related cascading and parallel connection on charge pumps is adopted, so that design flexibility is improved, and the current performance of the charge pumps is improved.

Description

technical field [0001] The invention belongs to the technical field of power supply systems, and relates to a reconfigurable series-parallel switched capacitor voltage converter with high conversion efficiency. Background technique [0002] With the construction of data centers and the popularization of consumer electronics fast charging, the energy density of voltage converters continues to increase, and higher energy density will inevitably require higher conversion efficiency. In these new application areas, the traditional charge pump topology has been widely used. The charge pump is a switched capacitor voltage converter. Compared with other voltage converter topologies, the biggest feature of the charge pump is that it only has capacitive energy storage devices and no inductive energy storage devices. It is precisely because of this feature that the charge pump has two advantages: first, there is no magnetic energy storage device, and the charge pump can instantly red...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the shortcomings of low voltage conversion efficiency and large heat loss in the above-mentioned traditional series-parallel charge pump system, the present invention proposes a reconfigurable series-parallel switched capacitor voltage converter, which has high conversion efficiency and can Maximize the utilization of each device in the circuit, improve the voltage conversion efficiency and reduce heat loss

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