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Power supply device and control method thereof

A technology for power supply device and output voltage control, which is applied in the direction of output power conversion device, electrical components, high-efficiency power electronic conversion, etc.

Active Publication Date: 2020-11-24
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The disclosure provides a power supply device and its control method to solve the technical problem in the prior art that when the output power of the power supply equipment is low, the power factor correction circuit will cause unnecessary power loss and reduce the conversion efficiency of the power supply equipment

Method used

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  • Power supply device and control method thereof
  • Power supply device and control method thereof
  • Power supply device and control method thereof

Examples

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Embodiment Construction

[0063] The following examples are described in detail in conjunction with the accompanying drawings in order to better understand the implementation of the present case. However, the provided examples are not intended to limit the scope of the disclosure, and the description of the structure and operation is not intended to limit its implementation. The sequence of any components recombined to produce devices with equivalent functions are within the scope of the present disclosure. In addition, according to industry standards and common practice, the drawings are only for the purpose of assisting explanation, and are not drawn according to original scale. In fact, the dimensions of various features can be arbitrarily increased or decreased for the convenience of illustration. In the following description, the same components will be described with the same symbols for easy understanding.

[0064] Unless otherwise specified, the terms used throughout the specification and claim...

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Abstract

The present disclosure provides a power supply device and a control method thereof. The power supply device includes a power source conversion circuit, a power factor correction circuit and an output voltage control circuit; the power source conversion circuit includes a primary side and a secondary side; the power source conversion circuit is used for receiving an input voltage and converting the input voltage into an output voltage; the power factor correction circuit is electrically connected with the primary side and is used for increasing the power factor of the power supply device; the output voltage control circuit is electrically connected with the secondary side and is used for controlling the voltage level of the output voltage; when the voltage level is lower than a preset level, the power factor correction circuit is turned off; and the output voltage control circuit detects the magnitude of output current and controls the power factor correction circuit to be turned off through control signals when the output current is larger than a preset current value, and therefore, conversion efficiency reduction caused by a condition that the power factor correction circuit is turned off under a lightly-loaded state through control signals can be avoided.

Description

technical field [0001] The disclosure relates to a power supply device, in particular to a power supply device with multiple voltage outputs and a control method thereof. Background technique [0002] Recently, with the popularization of various mobile electronic devices such as smart phones, tablet computers, etc., how to meet the charging requirements of mobile electronic devices is an important research topic in this field. Among various charging devices, the importance of a universal serial bus interface power supply device (USB Power Delivery) is gradually increasing. [0003] In order to avoid negative impact on the power system, as the power increases, the existing power supply equipment must have the ability to correct the power factor to meet the relevant specifications of the regulations. However, when the output power of the power supply equipment is low, the power factor correction circuit will cause unnecessary power loss, thereby reducing the conversion effici...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/42
CPCH02M1/4208Y02B70/10
Inventor 林昆祈郑仲结郭昆让陈殿河林首杰
Owner DELTA ELECTRONICS INC
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