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Constant current and constant voltage output multi-channel power supply system

A multi-channel power supply and constant voltage output technology, which is applied in the electronic field, can solve the problems of difficulty in integration, low cost, and low work efficiency, and achieve the goals of improving reliability and stability, improving work efficiency, and reducing power loss. Effect

Active Publication Date: 2013-09-04
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of this, the purpose of the present invention is a new multi-channel power supply system with constant current and constant voltage output, to solve the problems of large power loss, low work efficiency, low cost of implementation and difficulty in integration

Method used

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  • Constant current and constant voltage output multi-channel power supply system
  • Constant current and constant voltage output multi-channel power supply system
  • Constant current and constant voltage output multi-channel power supply system

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Embodiment Construction

[0036] Several preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made on the spirit and scope of the present invention. In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.

[0037] refer to figure 2 , shows a functional block diagram of a multi-channel power supply system with constant current and constant voltage output according to the first embodiment of the present invention. In this embodiment, a multi-channel power supply system with one constant current output and one constant voltage output is taken...

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Abstract

The invention provides a constant current and voltage output multi-channel power supply system, which comprises a transformer formed by (m+n) secondary side windings and primary side windings, m first output circuits and n second output circuits, wherein each primary side winding receives a half sine wave DC (Direct Current) voltage, and each first output circuit is used for driving an LED (Light Emitting Diode) load formed by one channel or multiple channels of LED lamp strings; m constant current control circuits are used for controlling the drive current of the LED load to keep constant, and n step-down switching regulators are correspondingly connected with n second output circuits and are used for receiving the output voltage of the second output circuits and controlling the output voltage of the step-down switching regulators to keep constant.

Description

technical field [0001] The invention relates to the field of electronic technology, more specifically, to a multi-channel power supply system with constant current and constant voltage output applied to LED devices. Background technique [0002] With the continuous innovation of liquid crystal display technology and the increase of application products, LED backlight has developed rapidly due to the advantages of energy saving, environmental protection and light and thin volume. However, since the brightness of the LED lamp is proportional to the driving current and the forward voltage drop, it also changes with the temperature. Therefore, the drive of the LED needs a constant current power supply to achieve the ideal luminous intensity. In order to ensure the normal operation of the LED, it is necessary for the driving power supply to provide corresponding driving voltage and driving current. In the prior art, a driving power supply used in LED backlight usually has multi...

Claims

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Application Information

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IPC IPC(8): H05B37/02H02M3/335
Inventor 陈伟赵晨
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD
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