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Power conversion device, switching method of power conversion units and electronic equipment

A power conversion unit and power conversion technology, which are used in output power conversion devices, electrical components, and electrical variables to adjust and other directions, can solve the problem that the power conversion efficiency cannot meet the stable output voltage, etc.

Active Publication Date: 2013-08-14
LENOVO (BEIJING) LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, when the input voltage of the power conversion device is low (for example, the battery power of the electronic device is low so that the output voltage of the battery is lower than a predetermined threshold), the output voltage of the power conversion device and its input voltage (for example, the output voltage of the battery) When the ratio is low, the power conversion efficiency of the Buck power conversion unit cannot meet the needs of a stable output voltage

Method used

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  • Power conversion device, switching method of power conversion units and electronic equipment
  • Power conversion device, switching method of power conversion units and electronic equipment
  • Power conversion device, switching method of power conversion units and electronic equipment

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Embodiment Construction

[0011] Various embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Here, it is to be noted that, in the drawings, the same reference numerals are assigned to components having substantially the same or similar structures and functions, and repeated descriptions about them will be omitted.

[0012] A power conversion device according to an embodiment of the present invention will be briefly described below. figure 1 is a block diagram illustrating a power conversion device according to an embodiment of the present invention. Such as figure 1 As shown, the power conversion device used in electronic equipment such as mobile phones, notebook computers or tablet computers may include: an input terminal 1, an output terminal 2, a power conversion unit 3 (including a linear power conversion unit 31, a chopping power conversion unit 32) and the power conversion unit selection unit 4.

[0013] Here, the input termin...

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Abstract

The invention relates to a power conversion device, a switching method of power conversion units and electronic equipment. The power conversion device comprises an input end and an output end, wherein the input end is configured to be connected with a power supply and receives input voltage; the output end is configured to be connected with a load and provides output voltage for the load. The power conversion units comprise a first power conversion unit, a second power conversion unit and a power conversion unit selection unit; the first power conversion unit is configured to convert the input voltage into the output voltage and stabilize the output voltage; the second power conversion unit is configured to convert the input voltage into the output voltage and stabilize the output voltage; when the ratio of the output voltage to the input voltage is larger than a first threshold value, the power conversion efficiency of the first power conversion unit is higher than that of the second power conversion unit; and the power conversion unit selection unit is configured to detect information corresponding to the ratio of the output voltage to the input voltage and selects the first power conversion unit and the second power conversion unit on the basis of the information corresponding to the ratio.

Description

technical field [0001] The invention relates to a power conversion device, a switching method of a power conversion unit in the power conversion device and electronic equipment using the power conversion device. Background technique [0002] In electronic devices such as mobile phones or tablet computers, various step-down power conversion devices are usually used to convert the voltage generated by the battery into the voltage required for the operation of the electronic device, and the battery is supplied to the Various components of electronic equipment are powered. [0003] A step-down power conversion device used in electronic devices such as mobile phones or tablet computers usually includes a linear (Linear) power conversion unit and a chopping (Buck) power conversion unit. When the input voltage of the power conversion device is high (for example, the battery power of the electronic device is large, resulting in a high output voltage of the battery), that is, when t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156
Inventor 周志强
Owner LENOVO (BEIJING) LTD
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