LED driving circuit and LED device

An LED driver and LED lamp technology, applied in circuit layout, lamp circuit layout, lighting devices, etc., can solve the problems of LED driver circuit without short-circuit protection function and components burned out, so as to avoid being burned out and realize short-circuit protection. Effect

Active Publication Date: 2010-06-02
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the embodiment of the present invention is to provide an LED driving circuit, aiming to solve the problem that the existing LED driving circuit does not have a short circuit protection function, which will cause the components to be burned out

Method used

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Embodiment Construction

[0015] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0016] The LED driving circuit provided by the embodiment of the present invention uses a control module to detect the negative pole voltage of the LED lamp, and compares the negative pole voltage of the LED lamp with a set threshold to determine whether the LED lamp is short-circuited. When the LED lamp is short-circuited, the output of the control module The terminal outputs a pulse control signal and controls the switch module to turn off, cut off the circuit of the LED lamp to realize short-circuit protection, and avoid the components from being burned out when the LED lamp is short-circuited. ...

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Abstract

The invention is applicable to the field of LEDs, and provides an LED driving circuit and an LED device. The LED driving circuit comprises a power module, a control module, a switch module, a first constant current module, a first voltage-dividing resistor and a second voltage-dividing resistor, wherein the detecting end of the control module is connected to the serial connecting end of the firstvoltage-dividing resistor and the second voltage-dividing resistor; whether an LED lamp has a short circuit or not is judged according to the detected negative voltage of the LED lamp by the control module; and when the LED lamp has the short circuit, the control module outputs a pulse control signal and controls the turn-off of the switch module so as to cut off the loop of the LED lamp to realize short circuit protection. In the LED driving circuit provided by the invention, the negative voltage of the LED lamp is detected by the control module; the short circuit of the LED lamp can be judged by comparing the negative voltage of the LED lamp with a preset threshold value; and when the LED lamp has the short circuit, the output end of the control module outputs the pulse control signal and controls the turn-off of the switch module so as to cut off the loop of the LED lamp to realize the short circuit protection, and components are prevented from being burned out when the LED lamp has the short circuit.

Description

technical field [0001] The invention belongs to the field of LEDs, in particular to an LED driving circuit and an LED device. Background technique [0002] The existing LED drive circuit has no short-circuit protection function. When the LED lamp is short-circuited, the LED drive circuit has no protection function, which will cause the constant current element to heat up until it burns out. Contents of the invention [0003] The purpose of the embodiment of the present invention is to provide an LED driving circuit, aiming at solving the problem that the existing LED driving circuit does not have a short circuit protection function and the components will be burned out. [0004] The embodiment of the present invention is achieved in this way, an LED driving circuit, the LED driving circuit includes: a power supply module, a control module, a switch module, a first constant current module, a first voltage dividing resistor and a second voltage dividing resistor; The input ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02F21V23/00F21Y101/02
Inventor 周明杰邵贤辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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