Maxim introduced the MAX16841 offline LED driver. Universal input (90VAC to 265VAC) allows the MAX16841 LED dimmer to be used in international dimmers, saving design time and cost. Leading (triac) and trailing edge (transistor) dimmers are used to provide flicker-free dimming from maximum light intensity to zero light intensity. Fixed frequency control optimizes the efficiency of low and high voltage AC lines. With a wide input range from 90VAC to 265VAC, the MAX16841 is a universal solution...
High-power led lamp beads 1W white light Sanan 30mil high power LED lamp beads imitation lumens Crystal oscillator 5050 green light LED 5050 lamp green light green light pure green super bright LED sticker Diodes Incorporated (Diodes Incorporated) having a current rise Release, buck and inverter functions - DC converter AL8812. The device integrates a 60V/3.6A NMOS channel to meet the basic functions of the DC-DC controller in a compact dual-band thermal pad DFN6040-12 package that reduces the...
Due to the advancement of LED technology , LED applications are increasingly diversified, from the early power indicator lights to LED lighting products with advantages of power saving, long life and high visibility. However, since only 15 to 20% of the input power of the high-power LED is converted into light, the remaining 80 to 85% is converted into heat. If the heat is not properly discharged to the outside world, the interface temperature of the LED die will be too high and the...
The need to provide higher performance and higher cost performance for LEDs has never been met, prompting the rapid adoption of LED headlamps for a variety of new models. The new LED driver IC meets these needs. It has constant current, high efficiency, wide dimming ratio range, and various protection functions to achieve system reliability. In the solution proposed in this paper, the LED driver circuit footprint is very compact, flat and highly efficient. By 2015, the market for...
Affected by the decrease in working days and the adjustment of inventory by customers, the first quarter revenue of Xindian was 1.766 billion yuan (NTD, the same below), the quarter was down 10.6%, the annual growth rate was still 21.7%, and the gross profit margin was 33.7% from the previous quarter. It fell to 28.8%, but it was better than the 28.1% level in the same period last year. It also reached the target of 25~30%. The net profit after tax was 325 million yuan, the quarter was reduced...
Topic: Technology 1 Introduction With the rising awareness of global environmental protection, energy saving has become a trend today. The LED industry is one of the most watched industries in recent years. Up to now, LED products have the advantages of energy saving, power saving, high efficiency, fast reaction time, long life, no mercury, and environmental benefits. However, usually the input power of LED high-power products is about 20%, which can be converted into light, and the remaining...
Is it good to heat or heat sink? With the rise of the real estate industry, many people have bought new homes. When they are remodeling their homes, they will be equipped with floor heating or radiators. Many people are tangling up with such problems. Is it really good to go? Is it better to have a radiator? Today, Xiaobian on this site will introduce you to a good or a good heat sink. Are there good ground heating or cooling fins? In fact, this does not have a specific answer, because...
The third quarter earnings report was released. The single-season revenue was 284 million yuan (NTD, the same below), and the quarter was down 2.2%, but the single-quarter gross profit margin was as high as 40.49%, the operating net profit was 67 million yuan, and the quarterly growth rate was 39.58%. The net profit for a single season is 52 million yuan and the EPS is 0.6 yuan. Guangsheng accumulated revenue of 827 million yuan in the first three quarters, an annual growth rate of 5.62%, a...
The main function of the heat sink substrate is to provide the power and heat transfer medium required for the LED. A good LED heat sink can transfer the heat of 80-90. Such a heat sink substrate is a good substrate. The current development of the LED industry is also focused on the development of high-power, high-brightness, small-size LED products. The above three factors will make the LED's heat dissipation efficiency higher and higher, but the LED is limited to the package size and other...
The aluminum profile radiator is also called the radiator aluminum profile or the sunflower profile aluminum profile. The aluminum profile radiator has the characteristics of beautiful appearance, light weight, good heat dissipation performance and good energy saving effect. installation steps: 1. First of all, please open the package of the aluminum profile radiator first, first install the bleed valve and the union. 2. You can draw the position of the hole on the wall to install the special...
With the widespread use of LED lamps, how to increase their use rate, reduce the warranty rate, and extend the use of results have become hot topics for a while. LED lamps are widely used in major shopping malls, office buildings, streets and other places, but they still cause higher costs due to heat dissipation problems. In order to seize the market, major material companies have continuously launched new R&D projects for heat sinks, from the initial metal aluminum casings to ceramic...
The LED industry is one of the most watched industries in recent years. Up to now, LED products have the advantages of energy saving, power saving, high efficiency, fast reaction time, long life cycle, and no mercury, and have environmental benefits; However, usually the input power of LED high-power products is about 20%, which can be converted into light, and the remaining 80% of the energy is converted into heat. In general, if the thermal energy generated by LED illumination cannot be...
With the heavy use of high-power LED light source, the technical requirements for LED drivers are increasing. High-voltage high-power LED driver can be connected directly to the grid (85V-265V). Can provide 100W of power. These drivers usually provide high current and high voltage output and have high efficiency. At the same time provide a variety of protection to improve the reliability of the drive. Based on AX6066 + A433LED driver circuit design The AX6066 is a converter with primary...
The AT8001 is a high-efficiency driver chip for the backlight drive field, allowing a wide power supply voltage range of 2.7V to 5.5V, which is particularly suitable for lithium battery-powered devices. The AT8001 sets the LED current through an external resistor. When the power supply voltage is above 3V, the AT8001 can drive up to 30mA per channel and the total current drive capability can reach 120mA. The AT8001 can adaptively switch between the 1x operation mode or the 1.5x operation mode...
Due to the low price, low heat generation and high luminous efficiency of low-power white LEDs, they have been widely applied to general lighting and landscape lighting. Therefore, there is an urgent need for the design and performance improvement of low-power LED driving power supplies. LED illuminators are usually powered by mains. Due to the low operating voltage of LEDs and low current, driving LEDs with mains to solve the buck and rectification problems requires higher efficiency, smaller...
This article describes an LED driver reference design for high power LED bulb replacement applications. The driver provides the power required for a 100W A19 incandescent bulb replacement lamp. It is a non-isolated, high efficiency (about 93%), high power factor (PF) LED driver that fits into the A19. The bulb not only meets the EN61000-3-2 C(D) standard, but also easily meets the THD limit. The power factor (PF) value exceeds 0.95, making it suitable for both commercial and consumer...
Color screen hoisting screen above the stage of the concert station (Source: Shenzhen Big Eye) Arc push screen at the world premiere ceremony of "Founding of the People's Republic of China" Taiwan, Hsinchu Shenzhen Big Eye Optoelectronics Technology Co., Ltd. uses the high-current LED driver MBI5042 with economical and high-performance 16-bit PWM control function, which was successfully introduced into the LED color curtain hoisting screen and circular screen, respectively in the longitudinal...
High power LED driver light design to replace low voltage halogen lamps: LED street lights meet the general direction of “energy saving and emission reduction” and have become the focus of attention of local governments. The Ministry of Science and Technology carried out the "Ten Cities and Ten Thousand Miles" LED lighting demonstration project, and Guangdong Province proposed the "Thousands of Miles" plan and so on. The Electronic Components Technology Network understands that while local...
1. Main current loop PCB as short as possible. LAYPCB experience, and layout, this is nothing, the quick way is to see more works of manufacturers. 2. Optimize the transformer parameter design to reduce eddy current losses caused by ringing. This is more difficult, we must first grasp the basic electromagnetic theory, design a reasonable transformer, the most important thing is patience, even if it is to think of can improve the efficiency of 0.5%, but also to try. 3. Reasonable selection of...
As energy saving has become a major issue in today's world, LED driver power supply is also more and more attention, the improvement of technology is constantly optimizing the energy efficiency of the system. However, in the face of such concepts as "high level of integration" and "digitization," enterprises are still paying more attention to realistic problems such as market and cost. LED driver chip has been described as the Cinderella semiconductor industry, which shows that LED driver power...
Several errors that are easy to make in LED circuits: For the novice, LED driver design is actually not an easy task. In this regard, Xiaobian specially summarizes some of the problems that design people need to pay attention to at work and personal design experience to share. Do not use bipolar power devices Since bipolar power devices are cheaper, generally about 2 cents, some designers use bipolar power devices to reduce the cost of LED driving, which will seriously affect the reliability of...
Microchip's CL88020 is an off-line LED driver with an input voltage of 120VAC and 8.5W of LED power. The device includes the CL88020 LED driver, six resistors and a bridge rectifier. It has programmable overtemperature protection, allowing THD to be thick and optional to reduce light load output. Ripple, using only one external ceramic storage capacitor, TRIAC dimming compatible, mainly used in LED lights and LED lighting fixtures. This article describes the main features of the CL88020, block...
Recently, Xiao Bian interviewed Doug Bailey, a senior expert in LED driver circuit design. He summed up the problems that need to be paid attention to in the design work and personal experience. I would like to share the following conclusions: First, do not use bipolar power devices Doug Bailey pointed out that because bipolar power devices are cheaper than MOSFETs, generally about 2 cents, some designers use bipolar power devices to reduce the cost of LED driving, which will seriously affect...
LED lighting has been rapidly developed in the near future, and LED has been widely recognized as a clean and clean light source. LED light source has long service life, energy saving, simple and convenient application, and low cost of use. Therefore, it will be used in a large number of home lighting applications. As early as 2008, the annual global sales of home lighting fixtures was about 50 billion. The technology of LED light source is becoming more and more mature, and the luminous lumen...
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