Key power and LED lighting application solutions

Key power and LED lighting application solutions

In the people environmental protection consciousness is more and more strong today, energy saving is not only issues, but also an important regulatory bodies and all countries leading manufacturers earnest effort action items. Look around our work and living environment, the most commonly used, the most common or have highly energy saving potential of electronic appliances natural first became energy-saving action, such as computer, target flat panel TVS, set-top boxes and adapter/external power source power application and light emitting diode (LED lighting). An important global regulatory bodies, such as the energy star, the United States 80 PLUS, European energy efficiency behavior standard (COC), the European Union and Japan's Top Runner, EuP China standardization institute on the key application update, more highly energy-efficient by standard, let the electronic products with less power to to carry out the same function, improve the efficiency of power use.

In many ways of output power, for example, desktop ATX 80 PLUS silver level standard, the calculation industry climate rescue operations (CSCI) silver level standard since July 2009, request to come more ways of output power in desktop ATX rated output power of 20%, 50% and 100% respectively under the condition such as energy efficiency reached 85%, 88% and 85%. The follow-up of 80 PLUS gold level and CSCI gold standard will level began in July 2010, will take effect further improve energy efficiency requirements to 87%, 90% and 87%.

And as flat TV, along with the increase of the size, the energy consumption has become a concern of the industry. Energy star on TV version 4.0 of the standard will be in effective May 1, 2010, the standard requirement visible screen diagonal size for 32 inches, 42 inches and 60 inches of flat TV in the energy consumption of the work mode respectively no more than 78 W, 115 W and 210 W, and subsequent in 2012 will be effective May 1, version 5.0 of the standard is further requirements this several size flat TV work no more than 55 W energy consumption, 81 W and 108 W, see table 1. European EuP also has a class instruction requirement. In addition to reduce energy consumption for work, these standard also requires reducing standby energy consumption, because the data showed that considerable power is in the consumption of the standby mode. Energy star standard for energy efficiency and the standby energy consumption demand is not more than 1 W, future requirements may not more than 0.3 W even not more than 0.1 W.

Table 1: "energy star" version 4.0 and 5.0 version of the standard TV work energy consumption requirements



And in notebook computers products widely used in adapter/external power source, energy star version 2.0 of the standard already in November of 2008, 1 st. With "energy star" version 2.0 of the external power source code as an example, the standard requirement output power greater than 49 W the external power source (typical products such as notebook adapter) work efficiency of 84% from 1.1 version of up to 87%, standby energy consumption (no-load) never more than 750 mW reduced to no more than 500 mW, and power factor (PF) also calls for not less than 0.9. The European Union EuP ecological design directive 2005/32 / EC standard No 278/2009 of the first stage and the second stage requirements, since April 2010 and April 2011, of which the first phase of the effective demand is the output power greater than 51 W the external power source of energy efficiency work not less than 85%, No more than 500 mW no-load energy consumption, the second stage of the load the energy consumption requirements remain unchanged, but energy efficiency asked open from 87% to.

In addition to these applications, LED lighting or called solid-state lighting (SSL) now also is the application of the hottest, 1.0 version of "energy star" SSL standard has since become effective on October 1, 2008, request close state (off-state) to zero, the lowest energy efficiency requirements of the application according to the different (such as the spotlight, outdoor lamp, etc) and different, power factor for commercial applications, is not less than 0.9, the housing application is not less than 0.7.

Power supply and LED lighting applications design challenges

These key power and LED lighting applications for the design engineer brought challenges, both need to increase energy efficiency, and to improve the density of power factor, and improve the reliability of the product.

In particular, the total energy efficiency requirements and heat because of restrictions, the design engineer must efforts to raise energy efficiency, even in low power application (or light load) also is such. In addition, and not only in high power electric usually has to require power factor correction (PFC), relatively low power can also request PFC. In addition, these applications are often faced with limited space in the problem, especially in the LED lighting to replace the traditional light bulb applications. Overall reliability is also very important. The input power range will more wide, support 277 Vac voltage. In addition, still face some specific lighting requirements, such as the three bidirectional thyristor switch components (TRIAC) light, etc.

strategies

To deal with these key power and LED lighting applications of design challenges, the need to update technology or the power of the optimization topology structure and plan.

In flat TV application, for example, will ask for energy efficiency to the highest, can be used cold cathode fluorescent lamps of traditional (CCFL) to replace the backlight emerging LED backlighting, such as direct the type backlighting or side light type backlighting, not only helps to QianBoXing TV design, but also help reduce the energy consumption and improve energy efficiency. If the current sex than maintain still higher CCFL backlighting, also can adopt different effective measures, such as in the light output provide equal under the condition of reducing energy consumption and reduce the number of lights, or use novel inverter drive scheme, such as liquid crystal TV integrated power supply (LIPS), reduce a power conversion section, improve efficiency and reduce the cost. Ansion beauty with the leading semiconductor products and systems to support the highly energy-efficient trend Ansion beauty of high performance, as first semiconductor silicon solution provider, energy efficiency with power management and LED lighting scheme to energy conservation, help customers to meet and exceed all over the world power standards (work efficiency, standby energy consumption, low static current and power factor correction, etc.), cost parity than traditional lower or scheme.

It is important to emphasize that ansion beauty semiconductor by whole channels to achieve highly energy-efficient, including:

1) reducing standby energy consumption (no-load). Including the use of quasi resonant (bottom switch), in two stages and better for PFC converter close topological structure of the frequency, and the walk, jump cycle, soft and high pressure jump cycle from an (bootstrap) circuit and other new technology.

2) improve work efficiency power supply. Including the use of better devices, such as field effect transistor (FET) and diode, and using better topology structure, such as frequency, synchronous rectifier, the walk and quasi resonant, complete resonance, active clamp a (flyback or is shock) soft switch technology.

3) power factor correction (or reduce harmonic). Including the converter, combining with PFC and optimizing the designated application and level of the control mode, such as the PFC continuous conductive mode (DCM), critical conductive mode (CrM) or continuous conductive mode (CCM).

Ansion beauty in these key power semiconductor and LED lighting applications provide many of the leading products, such as PFC controller, communication-DC (AC, DC) controller, high voltage MOSFET, LED drive, the rectifier, subprime synchronous rectifier controller, DC-direct current (DC-DC) switching voltage regulators and low pressure drop dropout regulator (LDO).quasi regulators, and based on these leading products provide the energy efficiency GreenPoint? Reference design, which ATX power supply, notebook and printer power adapter, television, solid-state lighting and other applications. Figure 1: ansion beauty semiconductor used for desktop ATX more than 85% of the energy efficiency, the 255 W power supply reference designs

Conclusion:

Computer, flat TV, adapter and key power application and LED lighting applications face higher energy efficiency requirements for design personnel, and challenges. Ansion beauty semiconductor existing building energy efficiency and power LED lighting applications of advanced technology and products, and is a complete solution provider, provide high performance, low system of the total cost of the GreenPoint differentiation? Reference design, improve energy efficiency, and both reducing standby energy consumption, while still providing high power factor, the whole way to help customers to meet or exceed all over the world energy efficiency of the specification requirements.

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