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Method and apparatus for high voltage power supply circuits

A power supply circuit and circuit technology, which is applied in the direction of output power conversion devices, electrical components, and adjustment of electrical variables, can solve problems such as increased cost of power supply circuits

Inactive Publication Date: 2011-12-21
POWER INTEGRATIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In this case, the cost of the power supply circuit is greatly increased due to the addition of a large additional input capacitance

Method used

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  • Method and apparatus for high voltage power supply circuits
  • Method and apparatus for high voltage power supply circuits
  • Method and apparatus for high voltage power supply circuits

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Embodiment Construction

[0016] Some examples of devices and methods for implementing high-voltage power supply circuits are disclosed. In the following description, many specific details are listed for a thorough understanding of the present invention. However, it is obvious to those of ordinary skill in the art that specific details are not required to implement the present invention. In order to avoid obscuring the present invention, the well-known methods related to implementation are not described in detail.

[0017] Throughout the specification, reference to "one embodiment" or "an embodiment" refers to a specific feature described in relation to the embodiment, and the structure or characteristic is included in at least one embodiment of the present invention. Therefore, the appearances of the terms "in one embodiment" or "in an embodiment" in various places throughout the specification do not all refer to the same embodiment. In addition, specific features, structures, or characteristics may be...

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Abstract

A high voltage power supply method and apparatus is disclosed. An apparatus according to aspects of the present invention includes a power supply circuit having a rectifier circuit coupled to input terminals of the power supply circuit that are to be coupled to receive an AC input voltage. A switchmode power converter circuit is coupled to the rectifier circuit to receive a rectified input voltage to generate a regulated output voltage in response to the rectified input voltage. A switch is coupled between the rectifier circuit and the switch mode power converter circuit. A sense circuit is coupled to detect the AC input voltage. The switch is coupled to be switched in response to the sense circuit . The switch is coupled to be switched off when an absolute value of the AC input voltage exceeds a first threshold value. The switch is coupled to be switched on when the absolute value of the AC input voltage is below a second threshold value.

Description

[0001] This application is a divisional application of the invention patent application with the application number 200710146426.8 and the application date on July 12, 2007, entitled "Method and Device for High Voltage Power Circuit". Technical field [0002] The present invention generally relates to power supplies, and more specifically, the present invention relates to power supplies capable of operating within a high-voltage AC input voltage range. Background technique [0003] In some applications of AC / DC power supply, sometimes it is desired that the power supply runs outside the normal operating voltage range. Typically, an AC / DC power supply designed to operate over a wide range is designed to operate at an AC input voltage between 85-265VAC rms. However, in emerging markets like India and China, the AC input voltage can be as high as 420VAC for a long time under certain conditions. [0004] In the power supply, the AC input voltage is typically rectified by a rectifier ci...

Claims

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Application Information

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IPC IPC(8): H02M7/12H02M3/335H02M7/539
CPCH02M7/062
Inventor D·M·H·马休斯
Owner POWER INTEGRATIONS INC
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