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Switch power supply with high power factor and controller of switch power supply

A switching power supply, power switching tube technology, applied in output power conversion devices, control/regulation systems, DC power input conversion to DC power output and other directions, can solve the problems of complex circuit structure, short life, high cost, and achieve the Complex circuit structure, high power factor, and the effect of realizing power factor

Active Publication Date: 2012-09-19
SHENZHEN SUNMOON MICROELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a switching power supply controller with high power factor, which aims to solve the problems of complex circuit structure, high cost and short life in the prior art

Method used

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  • Switch power supply with high power factor and controller of switch power supply
  • Switch power supply with high power factor and controller of switch power supply
  • Switch power supply with high power factor and controller of switch power supply

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Embodiment Construction

[0020] 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.

[0021] In the embodiment of the present invention, by using a switching power supply controller including a clock circuit, a multiplier, a reference signal generating module, a comparator, and a digital logic processing circuit, the power switching tube is controlled without an optocoupler for secondary side feedback. On and off to adjust the output current and power factor of the switching power supply, and then achieve the purpose of controlling the constant current output of the switching power supply and achieving high power factor. The entire switching power supply controller has a simple struc...

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Abstract

The invention is suitable for the field of a switch power supply and provides the switch power supply with a high power factor and a controller of the switch power supply. In the invention, on / off of a power switch tube is controlled under the condition of carrying out secondary feedback without an optical coupler to adjust the output current and the power factor of the switch power supply by adopting a switch power supply controller including a clock circuit, a multiplying unit, a reference signal generating module, a comparator and a digital logic processing circuit, thereby the purposes of controlling constant current output of the switch power supply and realizing high power factor are achieved. The overall switch power supply controller is simple in structure and long in service life, thereby the problems of complicated structure, high cost and short service life of the circuit in the prior art are solved.

Description

technical field [0001] The invention belongs to the field of switching power supplies, in particular to a switching power supply with high power factor and a controller thereof. Background technique [0002] At present, with the continuous development of switching power supply technology, switching power supply has the advantages of high efficiency, small size and low cost. Therefore, switching power supply is more and more widely used in various electronic devices. Especially in many LED drive power supplies, the switching power supply also needs to have a constant current output function; in addition, in the relevant standards formulated by many countries and organizations, in order to reduce the pollution to the power grid, the switching power supply in the LED drive power supply is also required to have High power factor, which requires switching power supply with power factor correction function at the same time. [0003] In order to have two functions of high power fa...

Claims

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Application Information

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IPC IPC(8): H02M7/217H02M3/335
Inventor 李照华赵春波林道明陈克勇谢靖胡乔
Owner SHENZHEN SUNMOON MICROELECTRONICS
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