The LED driving power supply is a voltage converter that converts the power supply into a specific voltage and current to drive the LED to emit light. Usually, the input of the LED driving power source includes high-voltage power frequency alternating current (ie, mains), low-voltage direct current, high-voltage direct current, low voltage high. Frequency communication (such as the output of an electronic transformer). The output of the LED driver is mostly a constant current source that...
By 2015, the market for high-brightness (HB) LEDs is expected to reach $20.2 billion (source: Strategies Unlimited). One of the key application areas driving this growth is the LEDs used in automotive design, including headlights, daytime running lights, brake lights, instrument panel backlighting, and various interior dressing lighting. This amazing growth rate is not only due to the high reliability, low power consumption and compact form factor of LEDs, but also because LEDs can be used to...
The LED power supply is the core component of the LED lamp. The LED drive power directly determines the service life of the LED lamp. Especially for outdoor lighting, its driving power must have strict waterproof function, otherwise it cannot withstand the harsh environment of the external environment. . Zhuhai Jinxing Technology Co., Ltd. specializes in the research and development of LED waterproof power supply, the main components are imported materials, and after a perfect DMT, DVT...
Topic: Industrial application technology enjoys a high market in the notebook computer (NB) keyboard control IC market? 茁 ㄍ迳 ㄍ迳 C design manufacturer Xunjie (ENE), recently actively entered the LED driver field, began to cultivate the city of LED related IC LEDinside recently visited Xunjie, through the product manager Mr. Zheng Wensheng, to understand the company's current status as the industry's fastest mid-level LED driver products, and Xunde's future development strategy in the driver...
Supertex has launched the LED driver IC "HV9985" with an input voltage range of +10 to 40V. Integrated 3-channel drive circuit for driving R (red), G (green) and B (blue) LED strings (connecting LED components) or driving 3 white LED strings. Mainly for LED backlights for LCD TVs. The product integrates a Linear Regulator that converts the +10 to 40V input voltage to +5V to the IC's internal circuitry. Inside the IC, three switching regulator control circuits that stabilize the voltage supplied...
First, the current situation of the use of LED drive power Standard lights are undergoing a revolution. In order to protect energy and respond to global warming, some states in the United States and other countries have begun to ban the use of energy-efficient incandescent bulbs. A variety of new technologies are being used to replace incandescent bulbs, with compact vacuum fluorescent lamps (CFLs) being the primary alternative. Although this CFL lamp consumes only 20% of the energy of an...
San Jose, California, USA – Power Integrations, Inc., the world’s most efficient and long-life manufacturer of off-line LED driver ICs, is today announced as its LinkSwitch? - PH IC product line adds new devices. The new device will enable commercial lighting applications up to 75W to benefit from a single-stage design, resulting in a significant reduction in BOM costs and smaller drives that achieve extremely high efficiency. LNK410EG (dimming) and LNK420EG (non-dimming) provide constant...
LED1642GW is ST's next-generation LED array driver, adding a series of fully configurable innovative features, while retaining the original 24-pin standard package, requiring only an external resistor in practical applications, which can significantly reduce component costs and improve System design flexibility. New embedded features make system design more flexible, providing users with different configuration options: local dimming, global current regulation, switching time setting,...
How to choose your own suitable LED driver IC? 1, the market is mixed LED driver IC-AMC7150 At that time, the AMC7150 was still good. I thought about it or mentioned it. It has a very important factor is the price, and the market price of less than 2 yuan is the reason you use it. The AMC7150 currently has dozens of IC models that can be directly replaced, and the price war cannot be avoided. It can be selected in low-voltage 4-25V products with low design parameters, and the basic drive...
At the end of 2012, when the sun rising early in the morning revealed her round smiling face on the horizon, the slender figure of three young men from the Institute of Engineering Thermophysics of the Chinese Academy of Sciences had been integrated into a dish like a satellite dish. In the huge figure. It is a solar-powered dish condenser that stands on the edge of the desert. The parabolic mirror composed of 33 high-end mirrors is at this moment just like a magnificent sunflower that slowly...
At the beginning of the new year, when many home-based businesses opened their doors with a beautiful touch, the radiators in Florence ushered in overwhelming criticism and hundreds of posts reprimanding the brand. "Don't dare to buy Florentine products anymore," "This famous brand will also have installation problems," "Consumers are weak, Florence is too irresponsible..." Many questioned Florence has become the focus of attention. After investigation, the reason was that some people faked the...
The advent of the renovation season, we should pay attention to what aspects of the problem when purchasing radiators? First of all, to understand the water quality of the community, is the acid or partial alkali, according to the characteristics of raw materials corrosion: steel afraid of acid, aluminum afraid of alkali, copper afraid of electrolytes, choose their own heat sink material. Second, to understand the various materials radiator manufacturing process, the steel is usually the...
【China Aluminum Industry Network】 1. For aluminum molds with high denticity and tongue ratio, the aluminum rod must be a short 150-200mm aluminum rod or a pure aluminum rod. 2. Before the trial moulding, the extrusion center of the aluminum extrusion machine must be adjusted. The extrusion shaft, the ingot ingot, and the discharge port of the die holder should be on a center line. Third, in the trial mode and normal production process, the aluminum rod heating temperature must be guaranteed...
(Text / Xiao Ying Wu Ruomei Huang Yanan Zhuzhou Institute of Technology) <Packaging Project>
(to be continued)
【China Aluminum Industry Network】 1. For aluminum molds with high denticity and tongue ratio, the aluminum rod must be 150-200mm short aluminum rod or pure aluminum rod. 2. Before the trial moulding, the extrusion center of the aluminum extrusion machine must be adjusted. The extrusion shaft, the ingot ingot, and the discharge port of the die holder should be on a center line. Third, in the trial mode and normal production process, the aluminum rod heating temperature must be guaranteed between...
The heat pipe is combined to expand the contact area with the heat source, and the internal cavity of the heat pipe is narrow, and the steam and the return liquid path are short, which is beneficial to the balance between the heat pipes under different working conditions in the working process, and can be applied to the heat generating point. The heat-emitting electronics and the chemical reactor are cooled and cooled, and the heat sink is compact and saves space when applied. The focus of this...
High-power LED lighting is solid-state lighting, which has the advantages of long life, safety and environmental protection, high efficiency and energy saving, fast response, etc. However, there are still some technologies that need to be solved urgently, mainly: low light extraction efficiency, large heat generation and high price. At present, the luminous efficiency of LEDs can only reach 10% to 20%, and 80% to 90% of energy is converted into heat [1], so that the heat flux density of...
The CFD simulation does not consider the contact thermal resistance between the components of the heat sink; there is an error in the assembly process of the heat sink and the measurement accuracy of the thermocouple in the experiment. It can be said that the experimental data confirms the correctness of the simulation results within the error range of simulation and experiment. Therefore, experiments and theories have shown that the use of drainage holes has a significant improvement in the...
introduction BJTs look like old-fashioned electronic components, but they solve many problems due to their low cost and superior parameters. We can see new applications that were not possible in the past due to the high cost of these components, such as the possibility of replacing more powerful transistors (with or without heat sinks) with multiple parallel low-power transistors in some cases Benefit from it. In general, low-power transistors are faster, have higher operating frequencies,...
The form of heat dissipation of the heat sink is mainly in the form of radiation and convection. Radiant heat transfer: Thermal energy is transmitted in the form of radiation, which can be propagated under vacuum without any medium. Convective heat transfer: The transfer of heat through air or other media, such as a coal stove to heat the air. The air heats everything in the room, and the convector relies mainly on medium (air) motion to transmit heat. Radiation radiators, which are...
High-power LED lighting is solid-state lighting, which has the advantages of long life, safety and environmental protection, high efficiency and energy saving, fast response, etc. However, there are still some technologies that need to be solved urgently, mainly: low light extraction efficiency, large heat generation and high price. At present, the luminous efficiency of LEDs can only reach 10% to 20%, and 80% to 90% of energy is converted into heat, so that the heat flux density of high-power...
[Text / high-tech LED reporter Gao Jinyu] "High light efficiency, high cost performance" has always been the direction of the LED industry, and LED lighting products are a systematic product, "light channel, electrical channel, hot channel" is the key factor . During the operation of the LED lamp, less than 20%-30% is converted into light energy, and about 70%-80% of the energy is converted into heat energy. If this part of the heat energy can not be dissipated in time, the heavy light will...
Heat Dissipation Analysis The fundamental purpose of the row heat pipe radiator developed in this paper is to remove high power LEDs in a timely and effective manner. The heat generated during operation controls the junction temperature of the chip within a reasonable range. For experimental studies, a key indicator of the performance of a heat sink is whether the temperature of the heat source surface is below the maximum allowable temperature. The temperature at the center point of the heat...
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