Power supply system and method for restraining ripple current of power supply system

A technology of power supply system and current source, which is applied in the direction of control/regulation system, electrical components, and adjustment of electrical variables, etc., can solve the problems of increasing cost and system volume, and achieve the effect of small size, low cost, and suppressing ripple

Active Publication Date: 2013-01-30
CHENGDU MONOLITHIC POWER SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, large capacitance will greatly increase the cost and system volume

Method used

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  • Power supply system and method for restraining ripple current of power supply system
  • Power supply system and method for restraining ripple current of power supply system
  • Power supply system and method for restraining ripple current of power supply system

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Embodiment Construction

[0022] Specific embodiments of the present invention will be described in detail below, and it should be noted that the embodiments described here are only for illustration, not for limiting the present invention. In the following detailed description of the invention, numerous details are set forth in order to better understand the invention. However, it will be understood by those skilled in the art that the present invention may be practiced without these specific details. In order to clearly illustrate the present invention, detailed descriptions of some specific structures and functions are simplified herein. In addition, similar structures and functions that have been described in detail in some embodiments will not be repeated in other embodiments. Although terms of the present invention have been described in conjunction with specific exemplary embodiments, these terms should not be construed as being limited to the exemplary embodiments set forth herein.

[0023] Th...

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PUM

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Abstract

The invention discloses a power supply system and a method for restraining a ripple current of the power supply system. The power supply system comprises a current source, a load and a ripple restraining circuit, wherein the current source is provided with an output end which is used for outputting the current, the load is provided with a first end and a second end, the first end is in a coupling connection with the output end of the current source, the current source provides power for the load, the ripple restraining circuit is provided with a first end and a second end, the first end of the ripple restraining circuit is in the coupling connection with the second end of the load, the second end of the ripple restraining circuit is in the coupling connection with reference ground, and the ripple restraining circuit can self-adaptively adjust the current to reach to the preset current of the current source and restrain the ripple in the current.

Description

technical field [0001] Embodiments of the present invention relate to a circuit system, in particular but not limited to a power supply system applied to a light-emitting diode (LED) and capable of adaptively suppressing current source ripple. Background technique [0002] A typical LED power supply controls the current flowing through the LED light source at a predetermined current. Therefore the LED power supply is approximated as a current source. figure 1 A schematic diagram of an existing LED power supply system 100 is shown. The power supply system 100 includes a converter 12 , which converts an alternating current (AC) voltage 11 such as 220V commercial power to form a current source I1 to provide power for the LED light string 13 . However, the current source I1 contains ripples, which will reduce the service life of the LED lamp 13 . In order to suppress the ripple, the power supply system 100 usually adopts a larger capacitor 14 . However, large capacitance wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/14
CPCG05F1/563H02M1/15
Inventor 邝乃兴俞佳琦余波
Owner CHENGDU MONOLITHIC POWER SYST
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