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Voltage conversion circuit, method and polyphase parallel power supply system

A technology of voltage conversion circuits and sub-circuits, applied in the field of electronics, can solve the problem that the operating frequency of DC-DC converters is not fixed, etc.

Active Publication Date: 2015-11-11
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Embodiments of the present invention provide a voltage conversion circuit, method and multi-phase parallel power supply system to solve the problem that the operating frequency of the hysteretic mode DC-DC converter in the prior art is not fixed

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  • Voltage conversion circuit, method and polyphase parallel power supply system
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  • Voltage conversion circuit, method and polyphase parallel power supply system

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Embodiment Construction

[0067] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0068] The embodiment of the present invention can implement a frequency-controllable voltage conversion circuit. It should be noted that the "frequency controllable" in the embodiment of the present invention specifically refers to any fixed frequency, for example, 5HZ, 8HZ, 8HZ, etc. It is flexibly set according to the load demand o...

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Abstract

Embodiments of the invention provide a voltage conversion circuit, a method and a polyphase parallel power supply system. In the voltage conversion circuit, through a feedback circuit, a feedback ripple signal with a controllable frequency is provided so that a work frequency of the voltage conversion circuit in the embodiments is controllable and a demand of a load to the frequency can be satisfied. And a response speed is fast in a hysteresis model without compensation. Simultaneously, because the work frequency is fixed, the voltage conversion circuit in the embodiments can be applied to the polyphase parallel power supply system so as to satisfy an application scene of a large load current.

Description

Technical field [0001] The embodiments of the present invention relate to electronic technology, and in particular to a voltage conversion circuit, a method and a multi-phase parallel power supply system. Background technique [0002] A DC-DC (DirectCurrent, DC for short) converter is a circuit topology that converts an input DC voltage into an output DC voltage. According to the characteristics of the system's buck-boost, DC-DC converters can be divided into main categories: boost (BOOST), buck (BUCK), and buck-boost (BUCK-BOOST). The general low-power DC-DC converter adopts the structure of step-down (BUCK) and boost (BOOST). Compared with traditional linear power systems, BUCK-type DC-DC converters have higher conversion efficiency and more energy saving. , The efficiency can reach more than 80%, and it has been widely used in mobile base stations and consumer terminals. [0003] In the existing more mature DC-DC converters, pulse width modulation (PulseWidthModulation, referr...

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Application Information

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IPC IPC(8): H02M3/156H02M3/158
CPCH02M1/08H02M3/1582H03K5/04H03K7/08H02M1/0025H02M3/1586H02M3/158H02M3/1584
Inventor 黄晨
Owner HUAWEI TECH CO LTD
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