& # 8203; Ordinary solar led road lamp driver power supply design form

LED lights are LED lamps and lanterns in recent years the fastest most used in outdoor lighting products in China. Led street lamp power supply is the key to the led street lamp inside is the most important components, is a bottle of development of led lights so the reasonable design of led street lamp power source to realize high efficiency and high reliable

led street lamp is the most widely used in China in recent years, the fastest growing outdoor lighting products. Led street lamp power supply is one of the most important key equipment of Led street light, it is also the bottleneck for the development of the Led street lamp. As a result, the reasonable design of led street lamp power source to realize high efficiency and high reliability has become the consensus of the industry, is also the focus of many research and development of led street lamp manufacturers. Common led street lamp power supply has the following four forms in the first place, the led street lamp power ac input directly, the series of led lights for constant current control, respectively. Its advantage is high efficiency, low cost, the disadvantage is that ac input, the design of complex, high cost. It must be a can directly by the ac input of street lamp. The second is DC or battery input, using multiple string of booster structure design, a series of led lamp bead, respectively, for constant current control. Its advantage is simple in design, circuit of low cost, but the efficiency is low, is used to input by solar cells or street lamp adapter. The third is a single string of step-down structure. Single string design with modular design, easy to maintain, step-down structure of high efficiency, single string design and advantages of flexible configuration, but the circuit cost is high, the light emitting diode series restricted by integrated circuit withstand voltage. Usually used for through the adapter type street light is the fourth monochord booster structure. Although it is also a single string design, but the number of led street light bulbs in series connection is determined by metal oxide semiconductor, no longer restricted by integrated circuit withstand voltage. Series can be more led road lamp bulb. Booster structure is very suitable for solar street light. This is due to the constant flow design of current mode, the output current is affected by the change of the input voltage is lesser, so can be loaded with the battery solar street lamps and maintain the same brightness when the battery is low.