The performance of LED explosion-proof lamp mainly depends on the driving power, heat dissipation and light source, while the driving power is crucial in the work of LED explosion-proof lamp. The life of the driving power itself and the stability of output current and voltage also have a great impact on the overall life quality of the product.
Due to the particularity of the processing and manufacturing of LED explosion-proof lamp, the current and voltage characteristics of LED explosion-proof lamp produced by different manufacturers and even the same manufacturer in the same batch of products are greatly different. Is typical in high-power 1 w white LED lamp specifications, for example, according to the current and voltage variation rule of LED explosion-proof lamps to do brief description, generally 1 w white light application forward voltage of 3.0-3.6 V, that is, when the nominal 1 w LED explosion-proof light in, through the 350 ma it may at the ends of the voltage at 3.1 V, may also be at 3.2 V or 3.5 V may also be other values, to ensure the longevity of wled explosion-proof lamp 1, general work LED explosion-proof lamp manufacturers suggest lamps factory use current of 350 ma to drive, When the forward current of 350 ma at the ends of the LED lamp, LED lamp at both ends of the increase of the forward voltage is very small, can make the LED lamp forward current rise sharply, the LED lamp temperature in a straight line, so as to accelerate the LED explosion-proof lighting, shortening the service life of LED lamp, serious when even LED explosion-proof lamps burn out. Due to the particularity of voltage and current variation of LED explosion-proof lamp, strict requirements are put forward for the power supply of LED explosion-proof lamp.
Constant current source driving is the best way of LED explosion-proof lamp drivers, driven by constant current source, not in the output circuit in series current limiting resistor, LED lamp on the flow of current is not affected by the outside power supply voltage, temperature changes, and the influence of LED explosion-proof light parameter discreteness, thus to keep the current constant, give full play to the LED explosion-proof lamps, all kinds of good qualities.
Constant current power supply of LED explosion-proof working lamp is adopted to power LED explosion-proof lamp. Since the current flowing through LED explosion-proof lamp will be automatically detected and controlled during the power supply operation, it is unnecessary to worry about excessive current flowing through LED explosion-proof lamp at the moment of power connection, or the short circuit of the load to burn out the power source.