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Buck DC-DC converter and electronic device

A DC-DC and converter technology, applied in the field of step-down DC-DC converters and electronic equipment, can solve problems such as inability to be widely used, improve power level, reduce voltage stress and output current ripple, and improve step-down effect of ability

Active Publication Date: 2019-02-19
SUZHOU INOSA UNITED POWER SYST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a new step-down DC-DC converter for the above-mentioned step-down DC-DC converter that is difficult to achieve high-efficiency conversion in the field of low-voltage conversion ratio conversion and cannot be widely used and electronic equipment

Method used

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  • Buck DC-DC converter and electronic device
  • Buck DC-DC converter and electronic device
  • Buck DC-DC converter and electronic device

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Embodiment Construction

[0037]In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0038] Such as figure 1 Shown is a schematic circuit diagram of an embodiment of the step-down DC-DC converter of the present invention. The step-down DC-DC converter is suitable for new energy electric vehicles, uninterruptible power supplies, industrial instrumentation, aerospace power supplies and other fields. The step-down DC-DC converter includes an input unit 1, a first-phase step-down unit 2, a second-phase step-down unit 3, an output unit 4 and a control unit; wherein, the input unit 1 is used to connect a DC power supply, and the output unit 4 It is used to connect a DC load (specifically...

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Abstract

The invention provides a buck DC-DC converter and an electronic device. The buck DC-DC converter comprises an input unit, a first phase buck unit, a second phase buck unit, an output unit and a control unit; the input unit is used for connecting with a direct current source, and the output unit is used for connecting with a direct current load. The first phase buck unit and the second phase buck unit are connected with the direct current load; the first phase buck unit includes a first switch tube; the second phase buck unit includes a second switch tube and a third switch tube; the control unit outputs pulse width modulation signals respectively to the first switch tube, the second switch tube and the third switch tube such that the first phase buck unit and the second phase buck unit outputs a voltage alternately to the output unit. The two-phase alternate parallel technique is used herein, buck capacity of the converter is improved, voltage stress and output current ripple of a switch device are decreased, and power level of the converter is increased.

Description

technical field [0001] The invention relates to the field of power electronic converters, more specifically, to a step-down DC-DC converter and electronic equipment. Background technique [0002] In new energy electric vehicles, uninterruptible power supplies, industrial instrumentation, aerospace power supplies and other application fields, step-down DC-DC converters play an important role in power conversion. The traditional Buck circuit has a simple structure and is easy to realize, and has a wide range of applications in medium and low power applications. However, the traditional buck circuit has limited step-down capability, and the voltage stress of switching devices is large, and it is difficult to achieve high-efficiency conversion in high-power applications. [0003] The Chinese invention patent application with the publication number CN107863882A discloses a step-down conversion BUCK circuit, which uses interleaved parallel technology to alternately provide energy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158H02M1/14
CPCH02M1/14H02M3/158
Inventor 吴贵洋郭建刘铁
Owner SUZHOU INOSA UNITED POWER SYST CO LTD
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