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Adaptive-gain step-up/down switched-capacitor dc/dc converters

A technology of DC converter and capacitor, which is applied in the direction of converting DC power input into DC power output, output power conversion equipment, and conversion equipment without intermediate conversion into AC, which can solve the problems of doubling switches and capacitors, and achieve good input noise, low input noise, and high efficiency

Inactive Publication Date: 2011-03-23
THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIV OF ARIZONA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, to provide the same benefits of interleaving for this topology, the number of switches and capacitors needs to be doubled

Method used

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  • Adaptive-gain step-up/down switched-capacitor dc/dc converters

Examples

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Embodiment Construction

[0057] Preferred embodiments will be described in detail below with reference to the accompanying drawings, wherein like reference numerals represent like elements.

[0058] A preferred embodiment involves a new topology that offers the same advantages but uses only half the switches. The preferred embodiment uses 3 capacitors and 18 switches, this number is exemplary and not limiting. Figure 5 A complete power supply stage 500 is shown. Using the on / off characteristics of the switches, the switch array can be configured to give 6 different gain states: 1 / 3, 1 / 2, 2 / 3, 1, 3 / 2, 2 and 3. This task is accomplished using a three-phase clock. The clock signal is routed according to the desired gain. Figure 6A and Figure 6B The clock signal and capacitor configuration are shown separately for all gain settings. In each phase of the clock, at least one capacitor is charged from the input and one capacitor is discharged at the output. Another capacitor is used or provided for ...

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Abstract

A switched-capacitor DC-DC converter has a reconfigurable power stage with variable gain ratio and / or interleaving regulation for low ripple voltage, fast load transient operation, variable output voltage and high efficiency. Since the power stage has multiple switches per capacitor, the converter exploits reconfigurable characteristics of the power stage for fast dynamic control and adaptive pulse control for tight and efficient voltage regulation.

Description

[0001] References to related applications [0002] This application claims priority to US Provisional Patent Application No. 61 / 004,095, filed November 21, 2007, the disclosure of which is hereby incorporated by reference into this disclosure in its entirety. technical field [0003] The present invention relates to direct current / direct current (DC / DC) converters, and more particularly to such converters using switches and capacitors in a reconfigurable manner. Background technique [0004] In recent years, multifunctional portable devices have grown rapidly in the electronics industry. Multifunctional modules in such devices are usually optimized at different power levels. To achieve long battery run times and low system profiles, efficient and compact power conversion circuits have become essential in these systems. [0005] Conventional switching converters provide high power efficiency but suffer from severe electromagnetic interference (EMI) noise and bulky system fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/07H02M3/155
CPCH02M3/07
Inventor 马东昇因沙德·乔杜里
Owner THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIV OF ARIZONA
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