LED lamp and drive circuit
A technology of LED lamps and driving circuits, which is applied in the field of lighting, and can solve the problems that the driving circuits do not have their own emergency functions, which is not conducive to the smooth development of business and office work.
Inactive Publication Date: 2013-06-19
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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Problems solved by technology
[0002] Currently, incandescent lamps or fluorescent lamps are generally used in household or commercial lamps. From the perspective of energy saving, environmental protection and service life, there are problems with the environment and economy. However, the use of such small power ( (mainly below 8W) LED lamps can greatly improve these problems, but the existing drive circuits using this kind of LED lamps rarely have their own emergency functions. From the perspective of frequent power outages, it will bring harm to the environment and economy. Many disadvantages are not conducive to the smooth development of business and office work
Method used
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Embodiment Construction
[0019] Such as figure 1 As shown, in the logic structure diagram of Embodiment 1 of the drive circuit of the LED lamp of the present invention, the drive circuit of the LED lamp includes a rectification unit 100, a step-down unit 200, a constant current drive unit 300, a feedback unit 400 and an emergency unit 500 , wherein the input end of the rectification unit 100 is connected to the alternating current for converting the input alternating voltage into a direct current voltage; the input end of the step-down unit 200 is connected to the output end of the rectification unit 100 for the direct current The voltage is subjected to step-down processing; the input end of the constant current drive unit 300 is connected to the output end of the step-down unit 200, and the output end of the constant-current drive unit 300 is connected to the LED, which is used to use the DC voltage output by the step-down unit 200 to implement the LED lamp. Constant current drive, providing a stabl...
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The present invention relates to an LED lamp and a drive circuit thereof, wherein, the drive circuit comprises a rectifying unit, a voltage reduction unit, constant-current drive unit and an emergency unit. In the emergency unit, the base electrode of a triode is connected with the output of the voltage reduction unit through a first divider resistance while the emitter of the triode is grounded;a second divider resistance is connected between the base electrode and the emitter of the triode; the collector electrode of the triode is connected with the grid electrode of an MOS tube; the source electrode of the MOS tube is connected with the output of an emergency power supply while the drain electrode is connected with the power input of the constant-current drive unit; a pull-up resistoris connected between the grid electrode and the source electrode of the MOS tube; and the positive electrode of a blocking diode is connected with the output of the voltage reduction unit while the negative electrode is connected with the power input of the constant-current drive unit. The present invention can guarantee that the constant-current drive unit can output current for driving LEDs to work and light normally even though alternate current fails.
Description
technical field [0001] The invention relates to the technical field of lighting, and more specifically, to an LED lamp and a driving circuit thereof. Background technique [0002] Currently, incandescent lamps or fluorescent lamps are generally used in household or commercial lamps. From the perspective of energy saving, environmental protection and service life, there are problems with the environment and economy. However, the use of such small power ( (mainly below 8W) LED lamps can greatly improve these problems, but the existing drive circuits using this kind of LED lamps rarely have their own emergency functions. From the perspective of frequent power outages, it will bring harm to the environment and economy. Many disadvantages are not conducive to the smooth development of business and office work. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an LED driving circuit capable of driving LED lamps to work,...
Claims
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IPC IPC(8): H05B37/02H02J9/06H02M7/08
Inventor 周明杰廖启博
Owner OCEANS KING LIGHTING SCI&TECH CO LTD