Talking about how to distinguish the goodness of led products
As solar street lights are widely used in all walks of life, LED power supplies are more and more widely used. More and more people want to know how to identify the quality of LED power supplies. The following editor briefly introduces:
1. Driver chip
The core of the IC drive power supply is the IC, and the quality of the IC directly affects the entire power supply. The IC on the LED power supply refuses to be polished, so that the lamp manufacturer can understand the IC solution and calculate the cost of the driver, so as to purchase the power supply products at a reasonable price.
Second, the transformer
The control chip can be regarded as the brain center of the power supply, while the transformer determines the power and temperature resistance. The transformer is responsible for the completion of "AC-magnetic energy-direct current", the energy overload will saturate the bomber. The core of the transformer is the magnetic core and the wire package.
Three, electrolytic capacitors and chip ceramic capacitors
The quality and life requirements of input electrolytic capacitors may be known to everyone, and everyone attaches great importance to it. However, people tend to ignore the quality requirements of the output capacitor. In fact, the life of the output capacitor has a great impact on the life of the power supply. The output end has a switching frequency of up to 60,000 times per second, which causes the parasitic resistance of the capacitor to heat up and produce a substance similar to scale. Finally, the electrolyte heats up and bursts. So this tiny chip resistor, poor options will also lead to cost price difference and greatly shorten the life of the power supply.
Fourth, the circuit design and welding process of power products
Judgment of the pros and cons of the design: Regardless of the professional point of view, it can be distinguished by some intuitive methods, such as the neat, generous and orderly layout of the components, and the bright and straight solder points. An engineer will not make a messy design. As for flying leads and manual addition of components, it is a serious lack of technical strength. Welding process: manual welding and wave soldering process. As we all know, the quality of mechanized production of wave soldering process is definitely better than manual welding. Identification method: whether there is red glue on the back.
At present, the flashing phenomenon of lamps after a period of use is basically caused by the power supply or the weak welding of the lamp beads. However, it is extremely difficult to detect the virtual solder of the product through aging, so it is necessary to rely on AOI to detect the quality of the power supply.
Five, batch inspection of aging racks and high temperature aging rooms for power products
No matter how good the material and production process control the power supply product, it still needs to detect the aging. Because the incoming inspection of electronic components and transformers is difficult to control. Only through the aging of the entire batch of power supplies and the high temperature sampling inspection of the high temperature room, the quality stability of this batch of power supplies and whether the materials have safety hazards can be detected.
The above 5 points are the factors that distinguish the power supply of LED street lights. I hope it will be helpful for everyone to buy LED street lights.
