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power charge pump

A charge pump and power technology, applied in the field of electronics, can solve the problem of high cost and achieve the effect of optimizing efficiency

Active Publication Date: 2016-11-30
WUXI ZGMICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More flying capacitors allow for more rate modes, but at a higher cost

Method used

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Embodiment Construction

[0024] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0025] The core idea of ​​the embodiment of the present invention is to use more other voltages in the system, such as tablet computers, smart phones, bluetooth headsets and other systems are equipped with power management units (Power Management Units), they can usually support multiple voltage outputs, Some are linear voltage regulators, and some are DC-DC converters. Through these as the second input voltage source and the battery as the first voltage source, design a power charge pump and build more voltage modes with other ratios to optimize the power charge pump. efficiency.

[0026] An embodiment of the present invention provides a power charge pump, the power charge pump includes an output capacitor, at least one flying capacitor, a first voltage source and a second voltage source, and a first group of clock sw...

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Abstract

The first aspect of the embodiment of the present invention provides a power charge pump, the power charge pump includes an output capacitor, at least one flying capacitor, a first voltage source and a second voltage source, and a first group of clock switches and a second group of clocks switch, the first and second clock switches each include at least two clock switches, and the conduction times of the first group of clock switches and the second group of clock switches do not overlap; when the first group of clock switches is turned on, at least one flying capacitor is controlled to generate The third voltage is the difference between the first voltage of the first voltage source and the second voltage of the second voltage source; when the second group of clock switches is turned on, the output capacitor is controlled to generate an output voltage proportional to the third voltage. Through the power charge pump provided by the embodiments of the present invention, more voltage modes that generate more input voltage / output voltage multiples can be constructed, which helps to optimize the efficiency of the power charge pump.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a power charge pump. Background technique [0002] Charge pump circuits based on switched capacitors are widely used in voltage conversion circuits, which can achieve high voltage conversion efficiency. The power charge pump in the prior art generally adopts an input voltage to generate an output voltage higher than the input or an output voltage lower than the output, and its efficiency is higher than that of a linear voltage regulator. [0003] Compared to inductor-based DC-DC converters, power charge pumps do not require bulky inductors, are more suitable for applications with less PCB space, and are less costly. For an ideal switch, its energy loss can be ignored, in this case, the efficiency of the power charge pump circuit can be considered as 100%. But when the power charge pump circuit can only convert the voltage at some fixed rate, its ideal power is 100%. However, such fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/07
Inventor 王钊
Owner WUXI ZGMICRO ELECTRONICS CO LTD