Single-stage power supply LED (Light Emitting Diode) constant-current driving analog-voltage dimming circuit
An analog voltage and constant current drive technology, applied in the direction of electric lamp circuit layout, electric light source, light source, etc., can solve the problems of complex circuit cost, large loss of two-stage circuit, temperature rise, etc., to achieve intelligentization and reduce overall cost Effect
Inactive Publication Date: 2013-06-12
SHENZHEN WELL LIT TECH
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Problems solved by technology
[0006] 1. The two-stage circuit used is used to drive the LED with a constant current and supports 0-10V analog voltage dimming, and the circuit is complex and costly
[0007] 2. The loss of the two-stage circuit is relatively large, the overall efficiency is relatively low, and the temperature rises
Unfavorable products are energy efficient
Method used
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[0029] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.
[0030] see image 3 , the present invention provides a single-stage power supply LED constant current drive analog voltage dimming circuit,
[0031] It includes an input power module 1 , a power control module 2 , an isolated power conversion module 3 , an analog voltage input current adjustment module 7 , a soft start module 5 , an output switch control module 6 and a constant current feedback module 4 .
[0032] The connection relationship of each module is as follows:
[0033] The input power module is provided with an AC input terminal, and the input power module is connected with the power control module and the isolated power conversion module; the isolated power conversion module is provided with a power supply output terminal for ...
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The invention provides a single-stage power supply LED (Light Emitting Diode) constant-current driving analog-voltage dimming circuit, which comprises an input power supply module, a power supply control module, an isolation power conversion module, an analog-voltage input current adjusting module, a soft starting module, an output switch control module and a constant-current feedback module. The single-stage power supply LED constant-current driving analog-voltage dimming circuit has the beneficial effects that since the analog-voltage input current adjusting module and the output switch control module are added in a single-stage power supply LED constant-current driving circuit and are matched with the constant-current feedback module and a constant-voltage feedback module, the problems that the efficiency of a two-stage LED driving 0-10V dimming circuit is low, the luminous efficiency of an LED lamp is low and the like can be effectively solved, the energy saving demands at present are complied, the overall cost of the LED lamp is reduced and the intelligentization of the LED lamp is facilitated.
Description
technical field [0001] The invention relates to the field of LED drive, in particular to a single-stage power supply LED constant current drive analog voltage dimming circuit. Background technique [0002] The existing LED dimming power supply circuits are mainly in two forms: [0003] like figure 1 , the alternating current AC is converted into a constant direct current DC voltage through a single-stage power supply. The constant direct current DC voltage passes through the step-down circuit again for 0-10V analog voltage control circuit output current to dim, turn on, and turn off the LED. [0004] like figure 2 , the alternating current AC is converted into a constant direct current DC voltage through a single-stage power supply. The constant direct current DC voltage passes through the step-up circuit again for 0-10V analog voltage control circuit output current to dim, turn on, and turn off the LED. [0005] It can be seen that the traditional LED dimming power su...
Claims
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IPC IPC(8): H05B37/02
CPCY02B20/40
Inventor 阳亮
Owner SHENZHEN WELL LIT TECH