What‘s the working principle of the power in the LED tube light

The power  is a very important component in the LED tube light, also called: drive, the quality of the power  make a direct impact on the life of the LED tube light. If the LED tube light is considered as a man, then the lamp beads of the LED light source  is the body of the tube, and the lamp power is the heart，which shows the importance of the power, so the power is also known as the soul of LED tube light by the industry professionals

A, the main requirements of the LED drive 

1, the double-height, namely: high power factor (PF), high conversion efficiency. PF = 0.9 and above, has been far more than the standard requirements of the world grid, thereby reducing the pollution of the grid; while the products with high conversion efficiency, in order to maximize the conversion of electrical energy into light energy, reducing heat loss.

2, the power is distinguished according to the voltage at the electrical connection: Wide voltage power supply - the so-called wide voltage refer to the normal operating voltage that can adapt to most countries，the wide voltage is generally :85-265VAC or 100-265VAC;

3, narrow voltage supply: the so-called narrow voltage actually is a relative term, mostly narrow voltage range :175-265V (there are 185-265V), the different power suppliers differ.

4, according to the input and output to distinguish: There are isolated and non-isolated power supply.

Simple Tip: teach you a trick best way to determine that LED driver is isolated or non-isolated power supply: isolated volume is too large, in use, the safety factor is the highest, on the contrary, non-isolated is smaller. Due to cost reasons, the application range of the isolation products in the market is narrower than of the non-isolated in the market.

Second, isolated and non-isolated power supply

The non-isolated constant current power supply: the non-isolated refers to the direct connection between the load terminal and the input terminal，so there is risk of electric shock to touch load. Currently the most used is non-isolated directly buck，which is that the AC is rectified to obtain the DC high voltage, then directly use the antihypertensive (Buck) circuit to buck and control constant current and the advantage of the non-isolated constant current source is simplicity and high efficiency.

2, isolated constant current power supply: Isolated refers to the isolation transformer isolate the input and output，the isolation transformer may be the power frequency or high frequency. However, both can isolate the input and output. Before and after the  isolation, without danger to the earth after level voltage, the output voltage can be equal to the input voltage or an range that can contain input voltage， not threat to humans, the performance of  the wide voltage is very good. The Disadvantages of the Isolated power : bulky, or the power of the equivalent volume is less.

Three, LED power fundamentals

Generally speaking, LED power mainly through the following three steps:

1, the buck: the 220V (or 110V) AC mains accessed buck the low voltage.

2, rectified: the low-voltage DC that has been step-down then through LED (LED diode characteristics: One-way conductivity) into a stable DC voltage electricity.

3, filter: through the capacitive inductive, becoming the stable low-voltage DC after several filter.

4, supply to the LED power .


Understanding  works working principle of the power in the LED tube light, another key is how to choose quality LED tube light,  there is no doubt that the best way is choosing a good LED manufacturers.Lead  lighting is constantly improving Production and R & D team, strict applying qualified LED chips, drivers, housing, radiator to produce all kinds of LED flood light, LED tube light, LED tunnel light and other indoor and outdoor LED lighting, high brightness SMD is used as the light source of the LED tube light and highly integrated and high brightness COB as the light source of the LED flood light, which fully guaranteed stability and soft light of the LED tube light and octahedron breadth and brightness irradiation range of the LED flood light, while LED tube light  and LED flood light use low voltage constant current driver, which current the alternating into direct current so that improve energy efficiency and reduce the waste heat energy and stroboscopic effect excite the human eye, the most important is that the LED lighting without adding mercury and other heavy metals harmful to our body and pollution the environment, that’s why the LED light is famous for energy-saving and environmental protection ，login www.ledclan.com to learn more features and uses of the LED tube light and surf www.lead-lighting.com to know more awesome LED floodlights and other LED lighting.