Power conversion device and electronic device comprising same

A technology of power conversion and power conversion unit, which is applied in the direction of output power conversion devices, circuit devices, emergency power arrangements, etc., and can solve problems such as unsatisfactory performance of Buck power conversion circuits, low power conversion efficiency, and large ripples.

Inactive Publication Date: 2012-10-10
LENOVO (BEIJING) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the load power requirement of the electronic equipment is high (for example, the screen is bright, or the program is running, etc.), thus requiring a large output current (that is, the load current), the Buck power conversion device usually has more power than the Linear power conversion device. High power conversion efficiency, while the power conversion efficiency of Buck power conversion device is lower than that of Linear power conversion device when the load power demand of electronic equipment is low (for example, standby) and thus requires a small output cur

Method used

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  • Power conversion device and electronic device comprising same
  • Power conversion device and electronic device comprising same
  • Power conversion device and electronic device comprising same

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Embodiment Construction

[0013] 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.

[0014] A power conversion device according to an embodiment of the present invention will be briefly described below. According to an embodiment of the present invention, a power conversion device used in an electronic device such as a mobile phone, a notebook computer or a tablet computer may include: an input terminal, an output terminal, a linear (Linear) power conversion unit, a chopper (Buck) power conversion unit unit and power conversion unit selection unit.

[0015] Here, the input end of the power conversion device may be connected to a power source (such as a battery) of the electronic device, and used to receive...

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Abstract

A power conversion device and an electronic device comprising the same. The power conversion device comprises an input terminal configured to connect with a power source and receive an input voltage; an output terminal configured to connect with a load and provide an output voltage for the load; a first power conversion unit configured to convert the input voltage into the output voltage and stabilize the output voltage; a second power conversion unit configured to convert the input voltage into the output voltage and stabilize the output voltage, the second power conversion unit having a higher power conversion efficiency than the first power conversion unit when an output current provided for the load is higher than a first threshold value; and a power conversion unit selection unit configured to detect parameters corresponding to the output current and select the first power conversion unit and the second power conversion unit based on the parameters corresponding to the output current.

Description

technical field [0001] The invention relates to a power conversion device and electronic equipment including 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] Step-down power conversion devices used in electronic devices such as mobile phones or tablet computers generally include linear (Linear) power conversion devices and chopping (Buck) power conversion devices. When the load power requirement of the electronic equipment is high (for example, the screen is bright, or the program is running, etc.), thus requiring a large output current (that is, the load current), the Buck power conversion device usually has more power than th...

Claims

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Application Information

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IPC IPC(8): H02M3/158H02J9/06
Inventor 杨明盛
Owner LENOVO (BEIJING) CO LTD
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