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High-power dimming LED constant-current driving circuit

A constant-current drive, high-power technology, applied in the layout of electric lamp circuits, light sources, electric light sources, etc., can solve the problems of user inconvenience, inability to adjust output power, and inability to adjust light intensity.

Active Publication Date: 2015-07-08
SHENZHEN OCEANS KING LIGHTING ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, integrated integrated high-frequency modules are used to design LED drivers in DC low-voltage places, but these driving methods are all constant power output, and the output power cannot be adjusted, and the light intensity cannot be adjusted, which brings great inconvenience to users. serious inconvenience

Method used

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  • High-power dimming LED constant-current driving circuit
  • High-power dimming LED constant-current driving circuit

Examples

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Embodiment Construction

[0019] Such as figure 1 Shown is a block diagram of a high-power dimmable LED constant current drive circuit.

[0020] A high-power dimmable LED constant current drive circuit includes a dimming module 103 , a voltage divider module 101 and a constant current drive module 102 .

[0021] The power supply terminal of the dimming module 103 is connected to the working voltage, and the output terminal is connected to the enable terminal of the constant current drive module 102; the output terminal of the voltage dividing module 101 is connected to the power supply terminal and the ground terminal of the constant current drive module 102 Grounding; the first output terminal and the second output terminal of the constant current drive module 102 are simultaneously connected to the negative pole of the series LED lamp group, and the positive pole of the series LED lamp group is connected to the input power supply, wherein the input terminal of the voltage divider module 101 Connect ...

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Abstract

A high-power dimming LED constant-current driving circuit comprises a dimming module, a voltage dividing module, and a constant-current driving module. The voltage dividing module is used for providing working voltage for the constant-current driving module to enable the constant-current driving module to drive an LED to be turned on. The dimming module outputs a pulse modulation and demodulation signal to the constant-current driving module to change the magnitude of current output by the constant-current driving module. Therefore, the input current of a series LED lamp group connected with the output end of the constant-current driving module is changed, and the illumination brightness of the series LED lamp group is changed.

Description

technical field [0001] The invention relates to an LED constant current drive circuit, in particular to a high-power adjustable light LED constant current drive circuit with multi-level light intensity adjustment function. Background technique [0002] LEDs are widely used as light sources, and various LED drive circuits have emerged accordingly. Since the LED itself has strict requirements on the working voltage, the working current of the LED will fluctuate greatly if the voltage is too high or too low, so the constant current and voltage limiting driving method is generally used for the LED. Therefore, when the LED is used as a current-type work load, the current flowing through the LED must be guaranteed to be within the rated current. At present, integrated integrated high-frequency modules are used to design LED drivers in DC low-voltage places, but these driving methods are all constant power output, and the output power cannot be adjusted, and the light intensity ca...

Claims

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Application Information

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IPC IPC(8): H05B37/02
Inventor 周明杰刘百顺
Owner SHENZHEN OCEANS KING LIGHTING ENG CO LTD
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