The power of the LED street lights, LED tunnel lights belongs to a class of electronic products for use outdoor, the poor working conditions puts forward strict requirements on the reliability of its work.. Surveyed and judged according to the failure analysis of the LED power , in addition what’s the factors resulting in the power failure is their own , a good power supply environment and the proper installation make a great impact on the reliability of the LED street lighting and LED tunnel lights such as the 60W LED tunnel lights, the following is need to be paid focus attention to when the LED drive power is installed and tested and used.



1 Product Description 1.1 the AC input line is the three cores , namely L, N, G test , connect the wiring and energized according to what the specifications requires ( Note: the input and output terminals of the power must be sure before the test , so as to avoid that the input voltage is directly applied on the output power ,resulting in the burned ) .

1.2 Ensure that the input voltage within the specified range of the product specification, prohibited that input voltage exceeds the scope of the requirements .

1.3 before the energized test , make sure all cables are connected properly : Ensure that the AC input line , the constant current output line and input line , constant current output line fully contact with the fixtures ( or load ), prevent poor contact caused that the test results is no exact, seriously , it may cause damage to the product .

1.4 Before testing , make sure that the load specifications , the input voltage and 1.3 is correct, then connect the AC power source.

1.5 input, output high voltage test , s the high voltage output terminal of the high-pressure machine must be connected to the L, N of the AC input line , and connect the low- end ( or the constant voltage module output ) to the fixtures, and make sure fully connect.

1.6 high-pressure test , make sure that the test voltage is within the requirements of the specifications , the test voltage that exceeds the standard requirements is strictly prohibited .

1.7 Before the test, the voltage of the high-pressure machine shall be adjusted to “03 V, mustn’t Power-on the booster until make sure that the setting of the test voltage and 1.5 is correct,then adjust the test voltage from ” 0 “V to the desired test voltage within 5-10 seconds.

Note: Do not instantly apply the test voltage on the product tested .

1.8 for the input to ground test , the high voltage output terminal of pressure machine must be connected to the L, N of the AC power line , and low pressure side terminating at cover screws of the constant module , and make sure fully connect . When testing, operation according to 1.7.

1.9 The user performing light aging , make sure the cable connection is fully guaranteed , and the input voltage are controlled within the range of allowable input voltage of the products, and prevent the large voltage consecutive beats .

Having known what should be paid attention to when we install the power of the LED street lights and LED tunnel lights,choosing the qualify LED road light is surely the key,there are a large number of excellent manufacturer engaging in researching and producing the LED street lights and the LED tunnel lights,of which Shenzhen Lead lighting is just one, the customer satisfaction and outstanding energy saving effect is the biggest encouragement of the company , Lead lighting has always been committed to R & D and production of more environmentally friendly energy-saving LED street lights, LED tunnel lights, LED High Bay Light, LED Flood Light, LED Panel,LED Ceiling Light etc with OEM&ODM service. As an ISO 9001:2000-certified factory, it can meet the strict standards of CE, RoHS, FCC certificate, these strict producing standards guarantee our products distribute smoothly both in domestic and international markets.Just browse http://www.lead-lighting.com/products/bid32-1.htm for the comprehensive performance and features of the LED tunnel lights or return the homepage for other vivid and awesome LED lights.

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Oznake: LED street lights, AC power, LED tunnel lights, RoHS, AC, ISO 9001:2000, LED flood light, G test, power supply, FCC

LED lighting requirements for low-voltage driver chip

1.The input voltage range of the nominal DC of the driver chip should satisfy 8 ~ 40V, which is to cover a wider application needs. Pressure capacity is preferably greater than 45V. When the input is AC 12V or 24V, the output voltage of the simple bridge rectifier will fluctuate with the grid voltage, especially when the voltage is high, the output DC voltage will be high. If there is not wide input voltage range for the driver IC, which tends to be

breakdown when the grid voltage rises, thereby burning the LED light source.

2.the nominal output current of the driver chips required is greater than 1.2 ~ 1.5A. For the LED light source used for lighting, the nominal operating current of 1W LED light source is 350mA, 3W LED light source nominal operating current is 700mA. Power LED light source needs more current, the LED lighting driver IC selected must have enough current output, the driving IC must also be operated at the optimum working area that is 70 to 90% of the full load output when the product is designed. There is poor heat dissipation when the driver IC is used in the small spaces at the full-load output current, which easily lead to fatigue and early failure.

3.the output current of the driver chip must be kept constant, so to stabilize the LED light, no flash. When the Same batch driver chip is used under the same conditions, the output current should be as consistent as possible, which is discrete to be small, so that ensure the effectiveness and orderliness on the high-volume automated production line. For the drive chip whose output current has certain discrete, required the sub-file selection before the factory or production line, adjust the size of the resistor set by the current on the PCB, so that LED constant current driver of LED lamps board produced is consistent with the emission luminance of the similar light source in order to maintain the consistency of the final product.

4. the package of the driver chip should facilitate rapid cooling of the die of the driver chip, such as the die is directly bind on the copper, and there is a direct extension of the pin outside of the package, in order to that the copper foil directly soldered on the PCB rapidly transfer the heat. If the chip that is similar to the 4X4mm through 300 ~ 1,000 mA current for long time, the power consumption and heat is inevitably generated, therefore, the physical and thermal structure of the chip itself is also very important.

5. driver chip anti-EMI, noise and high pressure capability is also related to that whether the entire LED lighting products can pass CE, UL certification, so the advanced topology structure and high-pressure production process should be used when the driver chip is designed.

6.driver chip’s own power requirements is less than 0.5W, the switching frequency is greater than 120Hz, in order to avoid visible flicker produced by the frequency interference.

In short, LED driver chip urge the green lighting to the development of innovative design. LED lighting without driver chip, requiring multi-functional LED light source driver IC. If the power supply that is less than 36V AC is used for the LED lamps, the non-isolated power supply can be considered; if the choice is 220V and 100V AC power, you should consider the isolating power supply. For the AC 100 ~ 220V drive chip directly used, because the application excessively depends on the volume demanding, there is higher demand, the greater difficulty on the technically, the countries are currently making efforts to develop. The Massive demand for LED lighting market gives the chances of success to all the IC design company again, if rapid transformation and pushing the product as early as possible, then there is a lot chances to win.

Nowadays,the LED flood light and LED tube light is most widely used as the representatives of the decorative lighting and the home lighting in daily life,the LED tube light enjoys a great popularity in our corridor, restaurants, shopping, leisure and entertainment, galleries, exhibition halls and other indoor environments everywhere, the LED flood light is mainly used in city squares, parks, stadiums, the facades of large commercial buildings and hotel, stage, waiting rooms, airports etc. where the higher brightness is needed to illuminate,meanwhile,there a large number of factory engaging in developing and producing the LED light,Lead Lighting is just one of them,which adopts high brightness SMD as the light source of the LED tube and highly integrated and high brightness COB as the light source of the LED flood light so that fully guaranteed stabe and soft light of the LED tube light and octahedron breadth and brightness irradiation range of the LED flood light, while low voltage constant current driver ensure the AC can be converted into the DC to improve energy efficiency of the LED tube light and LED flood light and reduce the waste heat energy and stroboscopic effect exciting 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 Known as energy-saving and environmental protection ,login http://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.

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Oznake: LED lamps, LED flood light, dc, voltage, IC, design, AC power, constant current, ma, light source