Everyone knows that our current residential electricity is 220v AC. For LED LEDs , it needs a low-voltage DC power supply. The main component of the LED lamp is the LED chip, and the LED chip is DC driven, so the conversion of the power supply is an indispensable condition when using the LED lamp.
　　 LED energy-saving lamp drive power quality has a great impact on the luminaire ;
Voltage and current to the chip LED lamp inside, lifetime, wavelength and luminous intensity of the LED lamps, and other light fades have a great influence, so that in the purchase process, the drive power is also an important quality factor.
　　 LED chip chips require low voltage DC for operation and generally require a power driver to provide a stable voltage and safe current. LED lamp drivers are built-in and external.
　　 Is the LED built-in power supply good or the external power supply good ??
The specifics depend on the use of the luminaire and the actual requirements of the luminaire. Look at the power size , if the power is large, it needs a large heat dissipation area , and the temperature inside the lamp body will be higher . At this time, it is recommended to use an external one . When the power is not too large, the heat dissipation of the lamp body is good and the temperature is not high . 40 degrees or less ) can be selected for built-in ; however, the external power supply, in fact, heat is better than the built-in !
Most of the LED lights currently on the market are built-in LED driver power supplies, and this kind of driving power supply is not easy to understand for the majority of consumers ;
For the driving power of the LED lamp, it is generally divided into two kinds of constant voltage source and constant current source, and the LED T8 tube is preferably a constant current source, and the LED lamp is sensitive to current, so the constant current is for the LED . The luminous intensity of the service life, the light decay is very helpful.
Therefore, when you buy, you must look for the constant flow source business. If you are going to the physical store to buy, here are some tips to let you determine the performance of the power supply you purchased.
There are transformers, power supply constant current chips, safety capacitors and other components in the drive circuit. If you don't understand it, it doesn't matter. Find a friend who knows this familiarity and buy it .
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