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High-power LED constant-current driving circuit

A constant-current drive, high-power technology, applied in the direction of lamp circuit layout, electric light source, lighting device, etc., can solve the problem of inapplicability of series LED lamp groups

Inactive 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 constant power output, so it is not suitable for series LED lamps with large power.

Method used

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Embodiment Construction

[0021] like figure 1 Shown is the block diagram of the high-power LED constant current drive circuit.

[0022] A high-power LED constant-current drive circuit includes a voltage conversion module 101, a constant-current drive module 102 for adjusting output voltage, and an energy storage module 103.

[0023] The input terminal of the voltage conversion module 101 is connected to the input power supply, the output terminal is connected to the enable terminal of the constant current drive module 102, and the ground terminal is grounded; the input terminal of the energy storage module 103 is connected to the input power supply, and the output terminal is connected to the series LED Light group: the input terminal of the constant current drive module 102 is connected to the input power supply, the first switch terminal and the second switch terminal are simultaneously connected to the series LED light group, and the ground terminal is grounded.

[0024] The voltage conversion mod...

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Abstract

A high-power LED constant-current driving circuit converts an input power supply into an enable signal through a voltage conversion module, and outputs the enable signal to a constant-current driving module. An energy storage module starts energy storage when connected to the input power supply. The input power supply supplies power to a series LED lamp group through the energy storage module. When an enable end of the constant-current driving module receives the enable signal, a first switching end and a second switching end of the constant-current driving module are switched on. The constant-current driving module is used for boosting and driving the LED lamp group to turn on the LD lamp group. When the enable end of the constant-current driving module does not receive the enable signal, the first switching end and the second switching end of the constant-current driving module are switched off. The energy storage module supplies power to the series LED lamp group. When the constant-current driving module receives the enable signal, the series LED lamp group is boosted and driven, and the working power of a load series LED lamp group is increased. Thus, the high-power LED constant-current driving circuit can be connected with a high-power series LED lamp group.

Description

technical field [0001] The invention relates to an LED drive circuit, in particular to a high-power LED constant current drive circuit. 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, so they are not suitable for series-connected LED lamps with large power. Contents of the invention [0003] Based on this, it is necessary to provide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 周明杰刘百顺
Owner SHENZHEN OCEANS KING LIGHTING ENG CO LTD
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