LED lighting system design LED explosion-proof lamp lighting performance

LED lighting system design LED explosion-proof lamp lighting performance An LED lamp contains one to a dozen or more LED chips, which are usually connected in series. The brightness of each chip is determined by the current passing through it. Due to the series connection, each LED chip in the bulb will automatically pass the same current, but the voltage on each chip is different. The forward voltage drop of the LED is usually .V, but it can vary from .V to .V. LEDs can be classified to limit the voltage fluctuation range, but this will increase the cost, and the forward voltage drop will still vary with temperature and usage time. To provide consistent light output, LED lights must be driven by a strictly regulated high-efficiency constant current power supply. As an alternative to incandescent lamps, LED lamps, the power supply must be integrated in the lamp housing. The requirements for LED drivers are very strict. It must be highly energy-efficient, must meet strict EMI and power factor specifications, and be able to safely withstand various fault conditions. Among them * is one of the difficult requirements is to have a dimming function. Due to the mismatch between the characteristics of the LED lamp and the dimming controller designed for incandescent lamps, it is easy to cause poor performance. The problem may manifest as a slow start-up speed, flickering, uneven lighting, or flickering when adjusting the brightness. In addition, there are problems such as inconsistent performance of each unit and audible noise from LED lights. These negative situations are usually caused by factors such as false triggering or premature shutdown of the controller and improper LED current control.