High-power LED refers to a light-emitting diode with a large rated working power. Ordinary LED power is generally 0.05W, working current is 20mA, while high-power LED can reach 1W, 2W, or even tens of watts, and working current can range from tens of milliamps to hundreds of milliamps. Due to the current constraints of high-power LEDs in terms of luminous flux, conversion efficiency and cost, it is determined that the short-term applications of high-power white LEDs are mainly lighting in some special fields, and the medium- and long-term goal is general lighting.

    Restricted by the heat dissipation of high-power LED light source technology and concentrated light and other technical conditions, the high-power LED lamps of wall washer manufacturers basically form a "chip-aluminum substrate-heat sink three-layer structure", that is, the chip is packaged in The LED light source module is formed on the aluminum substrate, and then the light source module is placed on the radiator to manufacture a high-power LED lighting fixture. The advantage of this structure mode is that the assembly method is simple, and the disadvantages are limited by the heat dissipation technology in the design and application promotion. At the same time, the limitation of heat dissipation technology also hinders high-power LED lamps from directly imitating traditional lamps. The enclosure of the "snake head lamp" is not conducive to heat dissipation and affects the service life of the product. Therefore, many manufacturers abandon the traditional lamp housing, and directly expose the heat sink, etc., these "bare lamps" present the functional semantics of high-power LED lamps with high heat dissipation, but ignore the product should have. Aesthetic semantics.

The technical requirements of high-power LED lamps for power supply drive are embodied as: high reliability, high efficiency, high power factor, reasonable driving mode, surge protection (LED has poor anti-surge ability, especially anti-reverse Voltage capability), protection function (except the general protection function of the power supply, fortunately, the negative feedback function of LED temperature is added to the cross-current output to prevent the LED temperature from being too high; when the driving circuit is faulty, the LED is short-circuited or open, the circuit can affect the LED and itself Play a very good protective role), protective measures (such as outdoor installation of lamps and lanterns, its structure should be moisture-proof, waterproof, and the shell can withstand high and low temperature sudden changes), the life of the driving power supply can match the life of the LED, etc.

    The combination of LED and building components makes LED lamps and lanterns themselves decorative. They can also be installed in transparent hollow pipelines to make linear light-emitting strips or strips, which are embedded on the outer edges of building facade components that require night scene decoration. Lights and small light-emitting boxes and other luminous bodies are integrated with the wall or roof.

    Yueyao's high-power wall washer has two characteristics to start: one is that the higher the temperature, the easier it is to start; the other is that the lamp is turned off and will not flicker. In addition, it is worth mentioning that many high-power wall washers are very dark when turned on, which is detrimental to the life of the bulb. High-power wall washers should have a power supply circuit and PCB board inside. When the led light is turned on, there is a time difference between a few tenths to two seconds between the power on and the light emitting, which is a normal phenomenon. Usually the light is driven by a constant current source with an IC integrated circuit, and its steady current and voltage stabilization performance is better. ,stable job.