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Controller, system and method for controlling light source energy

A controller and energy technology, applied in the field of controllers, can solve problems such as large size, and achieve the effect of reducing electromagnetic interference effects

Inactive Publication Date: 2012-10-17
AOTU ELECTRONICS WUHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the conventional flyback converter 100 is that its size is relatively large, and the electromagnetic induction of the transformer causes electromagnetic interference effects in the circuit work engineering

Method used

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  • Controller, system and method for controlling light source energy
  • Controller, system and method for controlling light source energy
  • Controller, system and method for controlling light source energy

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Embodiment Construction

[0018] A detailed description will be given below of embodiments of the present invention. Although the present invention has been illustrated and illustrated by these embodiments, it should be noted that the present invention is not limited to these embodiments. On the contrary, the invention covers all alternatives, modifications and equivalents which are within the spirit and scope of the invention as defined by the appended claims.

[0019] In addition, in order to better illustrate the present invention, numerous specific details are given in the specific embodiments below. It will be understood by those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, processes, components and circuits are not described in detail so as to highlight the gist of the present invention.

[0020] The invention provides a power converter and a method for controlling the power converter. A power converter c...

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Abstract

The invention provides a controller, a system and a method for controlling the light source energy of a light emitting diode (LED). The controller comprises a control terminal which is for providing control signals to control a transformer. A cycle of the control signal comprises a charging phase, a discharging phase and an adjusting phase. The controller further comprises a control circuit, wherein the control circuit is coupled with the control terminal and is for controlling a primary winding of the transformer to receive energy at the charging phase, for controlling a secondary winding of the transformer to discharge to the LED light source at the discharging phase, and for periodically changing the frequency of the control signal by controlling the adjusting phase. According to the invention, the electromagnetism interference effect in the circuit is reduced.

Description

technical field [0001] The invention relates to a controller, in particular to a controller, system and method for controlling the energy of a light source. Background technique [0002] A flyback converter is a switching regulated power supply that can be applied to an AC / DC adapter or battery charger. figure 1 Shown is a schematic structural diagram of a conventional flyback converter 100 . The flyback converter 100 utilizes a controller 120 to control a transformer. The transformer includes a primary winding 104 connected to a DC power source VBB, a secondary winding 106 connected to a load 112 and an auxiliary winding 108 . Controller 120 controls switch 118 in series with primary winding 104 . When the switch 118 is turned on, current flows through the primary winding 104 and the magnetic core 124 of the transformer stores energy. When the switch 118 is turned off, the diode 110 connected to the secondary winding is forward biased, and the energy stored in the magne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 任智谋许育彰谢云宁
Owner AOTU ELECTRONICS WUHAN