LED constant current driving protection circuit and lamp
A protection circuit, constant current drive technology, applied in emergency protection circuit devices, lamp circuit layout, electric light source, etc., can solve the stability discount of the light source working circuit, the inability to maintain the LED constant current driver, and the inaccuracy of the LED constant current protection circuit. And timely reflect the LED constant current driver working status and other issues to achieve the effect of improving stability
Inactive Publication Date: 2015-05-27
OCEANKING DONGGUAN LIGHTING TECH +2
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Problems solved by technology
[0003] However, the traditional LED constant current protection circuit cannot accurately and timely reflect the working status of the LED constant current driver, and cannot repair the LED constant current driver in time, which greatly reduces the stability of the entire light source working circuit
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[0018] Such as figure 1 Shown is a block diagram of an LED constant current drive protection circuit in an embodiment. The LED constant current drive protection circuit is used to indicate the working state of the LED constant current drive and disconnect the output of the power supply when the LED constant current drive fails. The LED constant current drive circuit includes a sampling module 110 for sampling the current flowing through the LED light source, a control module 120 for controlling the output of the power supply to the LED constant current driver according to the output of the sampling module, and issuing instructions according to the output of the control module The signal indicates the indication module 130 of the working state of the LED constant current driver.
[0019] Wherein, the sampling module 110 is connected between the LED light source and the ground, and the control module 120 is connected between the power supply and the ground. The control module 1...
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The invention discloses an LED constant current driving protection circuit. The LED constant current driving protection circuit is used for indicating the working condition of an LED constant current driver and disconnecting output of a power supply when the LED constant current driver is broken, and comprises a sampling module, a control module, and an indication module, wherein the sampling module is connected between an LED light source and the ground, and used for sampling the current flowing through the LED light source; the control module is connected with the sampling module and used for controlling the output of the power supply to the LED constant current driver according to the output of the sampling module; the input end of the indication module is connected with the control module, and the output end is grounded; the indication module is used for transmitting indicator signals and indicating the working condition of the LED constant current driver according to the output of the control module. The LED constant current driving protection circuit not only can protect the LED light source operating circuit, but also immediately indicates the working condition of the LED constant current regulator, so as to ensure the stability of the light source operating circuit.
Description
technical field [0001] The invention relates to the field of circuit protection, in particular to an LED constant current drive protection circuit and a lamp. Background technique [0002] In the lighting circuit, when the LED light source is working normally, an LED constant current driver is needed to convert the grid voltage into direct current and supply it to the LED light source. When the LED constant current driver fails, the current flowing through the LED light source will increase and damage the circuit components and LED light source. At this time, a protection circuit is needed to protect the entire light source working circuit. [0003] However, the traditional LED constant current protection circuit cannot accurately and timely reflect the working status of the LED constant current driver, and cannot repair the LED constant current driver in time, which greatly reduces the stability of the entire light source working circuit. Contents of the invention [000...
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IPC IPC(8): H02H7/20H05B37/00
Inventor 周明杰杨俊昌
Owner OCEANKING DONGGUAN LIGHTING TECH