The LED explosion-proof lamp driving power supply is a power converter that converts the power supply into a specific voltage and current to drive the LED explosion-proof lamp to emit light. Usually, the input of the LED explosion-proof lamp driving power supply includes high-voltage power frequency AC (ie mains), low-voltage DC. , high voltage DC, low voltage high frequency AC (such as the output of electronic transformers), etc. The output of the LED explosion-proof lamp driving power supply is mostly a constant current source that can change the voltage with the change of the forward voltage drop value of the LED explosion-proof lamp.
There are two most important points when buying LED explosion-proof lamp drive power supply
A: Look for the capacitor brand, among which Ruby (Rubycom Japan) is particularly well-known, and Hengying (HY domestic) is more common. Of course, the price is a few cents more expensive than other uncomfortable brand capacitors.
Two: Whether with IC control chip, because the IC control chip has protection functions such as short circuit, overvoltage, overload, and overtemperature.
As long as these two points are in place for the drive power, the quality is already very good.
The following points should also be considered when choosing the driving power supply for LED explosion-proof lamps:
General principles
a. According to the 20W current and voltage characteristics of LED explosion-proof lamps, it is ideal to use constant current drive. It can avoid the current fluctuation caused by the change of the forward voltage of the LED explosion-proof lamp, and at the same time, the constant current can stabilize the brightness of the LED.
b. In addition, the flux of LED explosion-proof light is inversely proportional to the temperature, so the heating of the power supply should be minimized and a well-designed cooling system should be used. Thereby, the ambient temperature at which the LED works is reduced.
c. In order to ensure the overall life of LED explosion-proof light products, the junction temperature of LED must be controlled within a certain range, that is, to control the working environment temperature of LED explosion-proof light products.
1 High reliability
The product is mainly composed of LED explosion-proof sight hole lamp chip and power supply, heat dissipation shell, control circuit and so on. The quality of the LED power supply directly affects the quality of the product. Especially LED street light products, because they are installed at high altitude, maintenance is inconvenient and the maintenance cost is also high.
2 High efficiency
LED is an energy-saving product, and the drive power must also meet the requirements of energy-saving. In particular, the structure of the power supply installed in the lamp is particularly important. Because the luminous efficiency of LED decreases with the increase of LED temperature. The efficiency of the power supply is high, its power loss is small, and the heat generated in the lamp is small, which reduces the temperature rise of the lamp. It is beneficial to delay the light decay of LED.
3 Constant current drive mode
In order to match the volt-ampere characteristics of the LED, the LED power supply must be driven by constant current.
4 Surge protection
The impact resistance of LED is relatively poor, so it is necessary to strengthen the protection in this regard. Especially for some products installed outdoors, the start and stop of the grid load and lightning strikes will have an impact on the power supply. Therefore, the input end of the LED driving power supply must have a surge suppression protection circuit to avoid instantaneous damage to the LED by the switch.
