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LED driving power supply and working method thereof, and LED lamp

A technology of LED drive and power supply, applied in the field of chargers and LED lighting, can solve the problems of poor anti-surge ability, poor reliability, grid interference, etc., and achieve the effect of convenient expansion, lifespan and reliability advantages

Inactive Publication Date: 2018-12-14
SHENZHEN TSYL GENERAL TECH LTD
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  • Claims
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Problems solved by technology

[0010] The main purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, and provide LED drive power supply, which adopts a brand-new topology structure, that is, a combination topology structure of low-frequency power supply conversion, active impedance characteristic conversion and intelligent digital power supply technology , can solve the defects of the current LED drive power supply, such as poor anti-surge ability, easy to interfere with the power grid, poor reliability, short life, and low working environment temperature

Method used

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  • LED driving power supply and working method thereof, and LED lamp
  • LED driving power supply and working method thereof, and LED lamp

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Embodiment Construction

[0042] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0043] Such as figure 1 , 2 , the realization idea of ​​LED drive power supply is as follows:

[0044] (1) The entire topology is divided into two levels, such as figure 1 .

[0045] Among them, the first-stage conversion circuit adopts a power frequency transformer to convert the mains high-voltage AC into low-voltage AC. The output AC voltage of the first stage is generally 12VAC ~ 48VAC to meet the requirements of SELV (Safety extra lowvoltage) in IEC 61558 . Generally, a fuse or a self-recoverable fuse can also be added to the primary side of the power frequency transformer to provide self-protection capability under abnormal conditions.

[0046] The power frequency transformer used in this stage has the characteristics of inductive impedance on the primary side...

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Abstract

The invention discloses an LED driving power supply, comprising a first stage conversion circuit and M parallel second stage conversion circuits. Wherein, the primary side of the first stage conversion circuit is connected with the mains power, and the secondary side is respectively connected with M second stage conversion circuits to convert the mains high-voltage alternating current into low-voltage alternating current; Each second stage conversion circuit comprises a switching impedance characteristic conversion circuit and a constant current control circuit, wherein the capacitive characteristic of the later stage LED load is converted into a resistive characteristic, the constant current control function is simultaneously completed, and the input low-voltage AC signal is converted into a low-voltage constant-current DC voltage of 24-120V, and the output voltage is output to the LED load. The second stage conversion circuit comprises a switching impedance characteristic conversioncircuit and a constant current control circuit. The invention adopts a brand new topological structure, that is, a topological structure combining low-frequency power conversion, active impedance characteristic conversion and intelligent digital power technology, can solve the defects of poor anti-surge capability, easy interference to a power network, poor reliability, short service life, low working environment temperature and the like of a current LED driving power supply.

Description

technical field [0001] The invention relates to the field of LED lighting, in particular to an LED driving power supply and its working method, an LED lamp, and also to other power supply fields, such as the field of chargers. Background technique [0002] With the maturity of LED technology, lighting products using LEDs as light sources have gradually replaced fluorescent lamps, gas discharge lamps, tungsten filament lamps and other light sources. LED lighting products generally need to use a power supply (also known as a driving power supply) to convert AC mains power into DC and provide various control functions. [0003] The current LED drive power supply has the following three situations: [0004] 1. Most of them use switching power supply conversion to achieve constant current or constant voltage functions. This kind of power supply has large input surge current at startup, large harmonic distortion of input current, and high-order harmonics. At the same time, There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00Y02B20/30
Inventor 赖秋萍
Owner SHENZHEN TSYL GENERAL TECH LTD
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