Buck boost converter and control method thereof

Active Publication Date: 2018-04-26
SILICON MITUS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention improves the efficiency of converters that work in multiple modes. This means that the number of modes that a converter can operate in is increased, leading to better performance and more versatility.

Problems solved by technology

However, a technology for maximizing the efficiency of the converter when the converter operates in two or more modes (e.g., buck mode and buck-boost mode) as described above is difficult to be found.

Method used

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  • Buck boost converter and control method thereof
  • Buck boost converter and control method thereof
  • Buck boost converter and control method thereof

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Embodiment Construction

[0029]Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In adding reference numerals to elements in each drawing, the same elements will be designated by the same reference numerals, if possible, although they are shown in different drawings. Further, in the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it is determined that the description may make the subject matter of the present invention rather unclear.

[0030]In addition, terms, such as first, second, A, B, (a), (b) or the like may be used herein when describing components of the present invention. These terms are merely used to distinguish one structural element from other structural elements, and a property, an order, a sequence and the like of a corresponding structural element are not limited by the term. It should be noted that if it is described in ...

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Abstract

The present invention provides a buck-boost converter including a converter power stage, a first mode control unit, and a second mode control unit. In the buck-boost converter, the converter power stage may include at least one inductor and a plurality of switching devices. Further, the first mode control unit may operate the converter power stage in a buck mode and regulate an output voltage of the converter power stage as a first voltage. Further, the second mode control unit may operate the converter power stage in a boost mode or a buck-boost mode, and regulate an output voltage of the converter power stage as a second voltage higher than the first voltage.

Description

BACKGROUND OF THE INVENTION1. Field of the Invention[0001]The present invention relates to a converter for converting a power.2. Description of the Prior Art[0002]A buck type converter, a boost type converter, and a buck-boost type converter have been widely known as switch-mode converters for converting a power using a power semiconductor.[0003]The buck type converter is referred to as a step-down converter because of outputting an output voltage to be lower than an input voltage. In the buck type converter, a ratio of the input voltage to the output voltage is proportional to a duty cycle (D) of the power semiconductor.[0004]The boost type converter is referred to as a step-up converter because of outputting an output voltage to be higher than an input voltage. In the boost type converter, generally, the ratio of the input voltage to the output voltage is inversely proportional to (1-D).[0005]The buck-boost type converter may allow the output voltage to be lower or higher than the...

Claims

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Application Information

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IPC IPC(8): H02M3/158
CPCH02M3/1582H02M3/156H02M3/06H02M1/0025H02M1/0009
InventorLAU, KIN KEUNG
OwnerSILICON MITUS