At the Consumer Electronics Show in Las Vegas (CES 2013), which recently came to a close, Marvell has partnered with several partners to launch a number of leading products under the theme of the “Smart Home†series. LED lighting, as a more environmentally intelligent lighting method, plays an important role in the “smart homeâ€. Not only that, but in the field of commercial lighting, the popularity of LED lighting is also accelerating. Taking stock of the 2012 LED lighting market, Marvell has stood out among the many LED driver solutions and has attracted widespread attention.
LED lighting market trends
At present, the division strategy of Marvell LED lighting market is two parts: indoor lighting and commercial lighting. Lance put forward three predictions on the development trend of LED indoor lighting market: First, thanks to the continuous decline in the price of LED lamps, LED lighting will enter an explosive growth stage in 2014-2015. Second, the entire market will shift from non-dimming to dimming. Finally, a wireless dimmable LED light appears.
“In 2012, the cost of LED lights continued to drop. In the US market, the price of mainstream 60W dimmable LED bulbs has dropped from $40/2011 to $20/only, and in 2013 it will drop to $10/only, and by 2015. years is expected to reach $ 5 / only alternative to the critical price so 2013 will be the key in this market, and the entire interior lighting market by 2014 - to enter the explosive growth stage 2015 "Marvell company Green technology marketing Director of Product technology. Lance Zheng said.
He also pointed out that the difference between the cost of non-dimming bulbs and dimming bulbs is getting smaller and smaller, the main cost difference is driven. For example, Marvell's drive solution dimming and non-dimming cost difference is only 20%, so this has pushed the LED lighting market to dim. In the United States, all major retail channels have turned to dimming solutions. “Last year, Philips introduced the smart lighting system Hue. Although the price is very high, the market reflects very well. The intelligent lighting system will be further developed in 2013. â€
As for the development trend of the LED commercial lighting market, Lance pointed out: First, the popularity of the industry is accelerating, such as the use of LED lights in shopping malls, hotels, retail, outdoor installations, "for example, such as the United States Wal-Mart supermarket has been comprehensive With LED lighting, the business return cycle of Cree's latest LED lighting fixtures has been shortened to around one year."
Second, digital dimming based on the DALI (Digital Addressable Dimming Interface) standard has also begun to gain popularity in commercial lighting. DALI originated in Europe 10 years ago and is now gaining popularity and accelerating growth. It has gained a foothold in the LED field and has moved from Europe to Asia. It is specific to LED functions, not just dimming, but also color.
LED lighting is moving towards the popular three "blocking tigers"
Although the price of LED bulbs is declining, LED lighting is still expensive for the average consumer. The cost is still high, and the size of the LED driver circuit is too large, becoming the first "blocking tiger" for LED lighting to go to the public.
Alternatively A19 60W dimmable LED lamp bulb currently cost about $ 7-8. The cost of LED light source and drive accounts for the first and second place in the cost of the entire LED bulb. The good news is that the price of LED light sources has dropped a lot last year. However, due to the fact that LED drive circuit technology has not been greatly improved in the past, the cost of LED light bulbs has remained high.
The volume of the LED driver circuit is also a problem. Japan is one of the countries with the largest consumption of LED lighting, and its most popular bulb E-17 is very small. There is also a GU10 bulb that is very hot in Europe, and the volume is very small. Limited by the limited space and the heat dissipation requirements of the LED, it is very difficult to put the LED driver circuit into a small light bulb such as the E-17 or GU10.
The second "blocker" for LED lighting to go to the public is compatibility with existing lighting architectures. The most important thing here is the thyristor dimmer. There is no uniform standard for the workings of various dimmers on the market. Therefore, when LED driving electronics are placed in an LED bulb, it is difficult to be compatible with various dimmers.
“Everyone knows that thyristor dimming is a very old technology. It is mainly used for incandescent lamps. When consumers buy, they don’t know how to replace their matching dimmers. So when you use LEDs When the bulb replaces the incandescent bulb, performance will have an impact. For example, when you install the LED bulb, you will find that the minimum is not so low, it may flash, and worse, when it is adjusted When the light source is at its lowest, it will not start again. This will bring great inconvenience to consumers," Lance further pointed out.
The third "blocking tiger" that LED lighting is going to the public is the consumer's will. It can be said that LED can save energy and save electricity, but only by launching different products can it stimulate consumers' desire to buy. “Consumer expectations are high. After all, the price of an incandescent lamp is less than 50 cents, and the LED bulb is $10, so consumers’ expectations for added value are high, just like when the Apple iPhone was launched. Marvell The drive solution can not only dim, but also color, if you provide this extra value to the consumer, they will feel the value they buy!" Lance said.
The key to the popularization of LED lighting lies in the innovation of LED driving technology
In the face of the above challenges in the popularization of LED lighting, what are the countermeasures?
"We believe that LED drive electronics has played the most important role in the overall commercialization of LED lighting. There are three reasons: First, LED drive technology is a key technology to ensure compatibility with existing lighting systems; Second, LED lighting The cost is also important (LED drive costs rank second in overall LED lighting costs); third, can it enhance the user experience?†Lance pointed out.
Innovation 1: Digital-to-analog hybrid architecture makes it easy to achieve the best dimming in the industry
Since the key to the popularity of LED lighting is the innovation of LED driver technology, then let's take a look at what Marvell has done in this regard.
Digital-analog hybrid architecture is one of Marvell's important innovations in LED driver technology. The so-called hybrid architecture has a DSP core inside each chip and can run algorithms. In addition to the DSP core, there is an OTP inside the chip, and the memory is programmable. The program does not require the user to write it himself, but instead has a development tool in which all algorithms are solidified. With this OTP, the dimming curve of the driver chip can be adjusted. Another key point is that unlike the algorithm used to run the microcontroller, this does not require development software.
Marvell introduced to the last-stage single LED driver IC 88EM8183 an example which uses a mixed-signal Marvell unique architecture and advanced dimming control technique, has several patents on the algorithms and architectures; 88EM8183 and can be programmed OTP Change the peripheral resistance to adjust the dimming curve. Deep dimming down to 1% of LED current is smoothly achieved, compared to similar LED driver solutions that typically only achieve 10% to 20% dimming. With this amplitude dimming, the human eye does not feel a great change in light intensity, so the 88EM8183 significantly improves performance. It is the industry's best dimming and cost-effective solution with up to 90% dimming efficiency, high power factor (up to 0.99) and low total harmonic distortion (less than 15%).
The 88EM8183 is also compatible with most (TRIAC) wall dimmers, whether it is a front-cut, a rear-cut dimmer, or a digital dimmer. Its dimmer compatibility can reach 90%, while competitors do well near 70% to 80%, generally below 60%.
In particular, the 88EM8183 is also capable of providing a wide range of output power platforms and providing a unified platform for customer dimming and non-dimming, high voltage and low voltage. Commercial downlights based on 88EM8183 have also been introduced to the market.
Another example of a Marvell digital-analog hybrid architecture application. This is based on the Marvell 88EM8801 dual-string smart LED driver solution. With this solution, color temperature adjustment, high color rendering index, and high energy efficiency can be achieved, which can provide optimal illumination quality close to incandescent lamps.
Innovation 2: Buck-boost non-isolation solution with smaller size, lower BOM cost and higher efficiency
As mentioned earlier, in order to help OEMs and ODMs adapt to LEDs of various sizes, such as A19, PAR, BR, E17, GU10 and Candle, without compromising dimming performance, LED driver board area is required to be as small as possible. . By using Marvell's new mixed-signal architecture and signal processing technology, and integrating as many analog components as possible into the LED driver chip, the 88EM8183 can reduce the number of components required for LED driver power by more than half, greatly reducing the number of components. The required power supply volume.
In particular, in addition to the Fly-back topology, the 88EM8183 can also support the Buck-boost topology, a non-isolated driver solution with smaller drive circuit sizes and more BOM cost than the Fly-back topology. It's much lower, and the drive efficiency is much higher.
"We recommend that customers use non-isolated solutions in high voltage and low current LED load, so driving efficiency will be maximized." Lance stressed, "88EM8183 non-isolated solutions can be used directly in GU10, Candle and EE17 and other very small size standard bulb Supporting these small-sized bulbs is an extended application that is superior to other solutions on the market.†As we all know, GU10 and Candle are the most mainstream LED bulbs currently shipping, and the OEMs and ODMs are still unable to find them. The toughest product of the right solution.
Marvell currently offers a complete board reference design for the 88EM8183 non-isolated drive solution that supports a wide range of output range applications and is easy to import into production, helping customers achieve very low PPM.
Marvell offers a complete board reference design based on the 88EM8183 non-isolated drive solution.
Lance pointed out: "The Buck-boost non-isolation solution we just launched this year can be said to be the industry's highest performance and lowest cost solution, and the driving cost is 20-40% less than the average competitor."
Innovation 3: Add intelligent network control to LED drivers
Ms. Dai Weili, co-founder of Marvell, said at CES 2013 that Marvell will further develop its strong integration strength in 2013 to provide consumers with a happy and connected life. The interconnection here is the key, and the addition of network control functions to the LED driver can achieve true intelligent lighting.
Based on the world's first dual-channel intelligent LED driver chip 88EM8801 mentioned above, Marvell developed an industry-leading Smart LED Driver in 2012. The benefits are specifically different configurations.
Lance thought about several applications in this media seminar: "LED bulbs have been saved, and they will be more energy-efficient after control. For example, if you work overtime later, you can use your mobile phone to turn off the lights at home. It will be energy-saving and very convenient after 5 minutes. It has a performance in the United States. When the whole family is on vacation, if the thief is on the door, the light can be turned on to prevent thieves from being visited to some extent."
“Because there are a lot of different control schemes on the market (Marvell has it). But the customer needs will be different, so we introduced the architecture, and replaced the unified control module to achieve compatibility and replacement of different control schemes.†Lance Further Point out.
Based on this architecture, Marvell designed the DALI control platform. Marvell DALI software supports the latest version of the DALI standard. The DALI endpoint stack provides configuration, group scheduling, scene management, and integration with the Marvell 88EM8801 to provide a variety of lighting control functions including on/off control, deep digital dimming, CCT control, temperature compensation, calibration, lighting monitoring and energy consumption. Estimate. In addition, the DALI control architecture enables Web Server-based management user interface control.
For indoor lighting platform, "Marvell plans to launch later this year will be based on Zigbee Light Link (ZLL) protocol standard programs as a low-power, low-cost technology, it related products in the Marvell LED lighting platforms, intelligent home, will Will be well applied," Lance said.
Lance concluded at the end of the speech: "Since we launched the first deep dimming driver chip last year, the market feedback is very good. The mainstream lighting companies are either mass-produced or are preparing for mass production. The Chinese market is very important for Marvell. As part of the entire LED lighting industry, 90% of companies are in China. We will continue to invest in supporting resources to help promote the popularity of LED lighting and help China's LED lighting industry grow."
LED lighting market trends
At present, the division strategy of Marvell LED lighting market is two parts: indoor lighting and commercial lighting. Lance put forward three predictions on the development trend of LED indoor lighting market: First, thanks to the continuous decline in the price of LED lamps, LED lighting will enter an explosive growth stage in 2014-2015. Second, the entire market will shift from non-dimming to dimming. Finally, a wireless dimmable LED light appears.
“In 2012, the cost of LED lights continued to drop. In the US market, the price of mainstream 60W dimmable LED bulbs has dropped from $40/2011 to $20/only, and in 2013 it will drop to $10/only, and by 2015. years is expected to reach $ 5 / only alternative to the critical price so 2013 will be the key in this market, and the entire interior lighting market by 2014 - to enter the explosive growth stage 2015 "Marvell company Green technology marketing Director of Product technology. Lance Zheng said.
He also pointed out that the difference between the cost of non-dimming bulbs and dimming bulbs is getting smaller and smaller, the main cost difference is driven. For example, Marvell's drive solution dimming and non-dimming cost difference is only 20%, so this has pushed the LED lighting market to dim. In the United States, all major retail channels have turned to dimming solutions. “Last year, Philips introduced the smart lighting system Hue. Although the price is very high, the market reflects very well. The intelligent lighting system will be further developed in 2013. â€
As for the development trend of the LED commercial lighting market, Lance pointed out: First, the popularity of the industry is accelerating, such as the use of LED lights in shopping malls, hotels, retail, outdoor installations, "for example, such as the United States Wal-Mart supermarket has been comprehensive With LED lighting, the business return cycle of Cree's latest LED lighting fixtures has been shortened to around one year."
Second, digital dimming based on the DALI (Digital Addressable Dimming Interface) standard has also begun to gain popularity in commercial lighting. DALI originated in Europe 10 years ago and is now gaining popularity and accelerating growth. It has gained a foothold in the LED field and has moved from Europe to Asia. It is specific to LED functions, not just dimming, but also color.
LED lighting is moving towards the popular three "blocking tigers"
Although the price of LED bulbs is declining, LED lighting is still expensive for the average consumer. The cost is still high, and the size of the LED driver circuit is too large, becoming the first "blocking tiger" for LED lighting to go to the public.
Alternatively A19 60W dimmable LED lamp bulb currently cost about $ 7-8. The cost of LED light source and drive accounts for the first and second place in the cost of the entire LED bulb. The good news is that the price of LED light sources has dropped a lot last year. However, due to the fact that LED drive circuit technology has not been greatly improved in the past, the cost of LED light bulbs has remained high.
The volume of the LED driver circuit is also a problem. Japan is one of the countries with the largest consumption of LED lighting, and its most popular bulb E-17 is very small. There is also a GU10 bulb that is very hot in Europe, and the volume is very small. Limited by the limited space and the heat dissipation requirements of the LED, it is very difficult to put the LED driver circuit into a small light bulb such as the E-17 or GU10.
The second "blocker" for LED lighting to go to the public is compatibility with existing lighting architectures. The most important thing here is the thyristor dimmer. There is no uniform standard for the workings of various dimmers on the market. Therefore, when LED driving electronics are placed in an LED bulb, it is difficult to be compatible with various dimmers.
“Everyone knows that thyristor dimming is a very old technology. It is mainly used for incandescent lamps. When consumers buy, they don’t know how to replace their matching dimmers. So when you use LEDs When the bulb replaces the incandescent bulb, performance will have an impact. For example, when you install the LED bulb, you will find that the minimum is not so low, it may flash, and worse, when it is adjusted When the light source is at its lowest, it will not start again. This will bring great inconvenience to consumers," Lance further pointed out.
The third "blocking tiger" that LED lighting is going to the public is the consumer's will. It can be said that LED can save energy and save electricity, but only by launching different products can it stimulate consumers' desire to buy. “Consumer expectations are high. After all, the price of an incandescent lamp is less than 50 cents, and the LED bulb is $10, so consumers’ expectations for added value are high, just like when the Apple iPhone was launched. Marvell The drive solution can not only dim, but also color, if you provide this extra value to the consumer, they will feel the value they buy!" Lance said.
The key to the popularization of LED lighting lies in the innovation of LED driving technology
In the face of the above challenges in the popularization of LED lighting, what are the countermeasures?
"We believe that LED drive electronics has played the most important role in the overall commercialization of LED lighting. There are three reasons: First, LED drive technology is a key technology to ensure compatibility with existing lighting systems; Second, LED lighting The cost is also important (LED drive costs rank second in overall LED lighting costs); third, can it enhance the user experience?†Lance pointed out.
Innovation 1: Digital-to-analog hybrid architecture makes it easy to achieve the best dimming in the industry
Since the key to the popularity of LED lighting is the innovation of LED driver technology, then let's take a look at what Marvell has done in this regard.
Digital-analog hybrid architecture is one of Marvell's important innovations in LED driver technology. The so-called hybrid architecture has a DSP core inside each chip and can run algorithms. In addition to the DSP core, there is an OTP inside the chip, and the memory is programmable. The program does not require the user to write it himself, but instead has a development tool in which all algorithms are solidified. With this OTP, the dimming curve of the driver chip can be adjusted. Another key point is that unlike the algorithm used to run the microcontroller, this does not require development software.
Marvell introduced to the last-stage single LED driver IC 88EM8183 an example which uses a mixed-signal Marvell unique architecture and advanced dimming control technique, has several patents on the algorithms and architectures; 88EM8183 and can be programmed OTP Change the peripheral resistance to adjust the dimming curve. Deep dimming down to 1% of LED current is smoothly achieved, compared to similar LED driver solutions that typically only achieve 10% to 20% dimming. With this amplitude dimming, the human eye does not feel a great change in light intensity, so the 88EM8183 significantly improves performance. It is the industry's best dimming and cost-effective solution with up to 90% dimming efficiency, high power factor (up to 0.99) and low total harmonic distortion (less than 15%).
The 88EM8183 is also compatible with most (TRIAC) wall dimmers, whether it is a front-cut, a rear-cut dimmer, or a digital dimmer. Its dimmer compatibility can reach 90%, while competitors do well near 70% to 80%, generally below 60%.
In particular, the 88EM8183 is also capable of providing a wide range of output power platforms and providing a unified platform for customer dimming and non-dimming, high voltage and low voltage. Commercial downlights based on 88EM8183 have also been introduced to the market.
Another example of a Marvell digital-analog hybrid architecture application. This is based on the Marvell 88EM8801 dual-string smart LED driver solution. With this solution, color temperature adjustment, high color rendering index, and high energy efficiency can be achieved, which can provide optimal illumination quality close to incandescent lamps.
Innovation 2: Buck-boost non-isolation solution with smaller size, lower BOM cost and higher efficiency
As mentioned earlier, in order to help OEMs and ODMs adapt to LEDs of various sizes, such as A19, PAR, BR, E17, GU10 and Candle, without compromising dimming performance, LED driver board area is required to be as small as possible. . By using Marvell's new mixed-signal architecture and signal processing technology, and integrating as many analog components as possible into the LED driver chip, the 88EM8183 can reduce the number of components required for LED driver power by more than half, greatly reducing the number of components. The required power supply volume.
In particular, in addition to the Fly-back topology, the 88EM8183 can also support the Buck-boost topology, a non-isolated driver solution with smaller drive circuit sizes and more BOM cost than the Fly-back topology. It's much lower, and the drive efficiency is much higher.
"We recommend that customers use non-isolated solutions in high voltage and low current LED load, so driving efficiency will be maximized." Lance stressed, "88EM8183 non-isolated solutions can be used directly in GU10, Candle and EE17 and other very small size standard bulb Supporting these small-sized bulbs is an extended application that is superior to other solutions on the market.†As we all know, GU10 and Candle are the most mainstream LED bulbs currently shipping, and the OEMs and ODMs are still unable to find them. The toughest product of the right solution.
Marvell currently offers a complete board reference design for the 88EM8183 non-isolated drive solution that supports a wide range of output range applications and is easy to import into production, helping customers achieve very low PPM.
Marvell offers a complete board reference design based on the 88EM8183 non-isolated drive solution.
Lance pointed out: "The Buck-boost non-isolation solution we just launched this year can be said to be the industry's highest performance and lowest cost solution, and the driving cost is 20-40% less than the average competitor."
Innovation 3: Add intelligent network control to LED drivers
Ms. Dai Weili, co-founder of Marvell, said at CES 2013 that Marvell will further develop its strong integration strength in 2013 to provide consumers with a happy and connected life. The interconnection here is the key, and the addition of network control functions to the LED driver can achieve true intelligent lighting.
Based on the world's first dual-channel intelligent LED driver chip 88EM8801 mentioned above, Marvell developed an industry-leading Smart LED Driver in 2012. The benefits are specifically different configurations.
Lance thought about several applications in this media seminar: "LED bulbs have been saved, and they will be more energy-efficient after control. For example, if you work overtime later, you can use your mobile phone to turn off the lights at home. It will be energy-saving and very convenient after 5 minutes. It has a performance in the United States. When the whole family is on vacation, if the thief is on the door, the light can be turned on to prevent thieves from being visited to some extent."
“Because there are a lot of different control schemes on the market (Marvell has it). But the customer needs will be different, so we introduced the architecture, and replaced the unified control module to achieve compatibility and replacement of different control schemes.†Lance Further Point out.
Based on this architecture, Marvell designed the DALI control platform. Marvell DALI software supports the latest version of the DALI standard. The DALI endpoint stack provides configuration, group scheduling, scene management, and integration with the Marvell 88EM8801 to provide a variety of lighting control functions including on/off control, deep digital dimming, CCT control, temperature compensation, calibration, lighting monitoring and energy consumption. Estimate. In addition, the DALI control architecture enables Web Server-based management user interface control.
For indoor lighting platform, "Marvell plans to launch later this year will be based on Zigbee Light Link (ZLL) protocol standard programs as a low-power, low-cost technology, it related products in the Marvell LED lighting platforms, intelligent home, will Will be well applied," Lance said.
Lance concluded at the end of the speech: "Since we launched the first deep dimming driver chip last year, the market feedback is very good. The mainstream lighting companies are either mass-produced or are preparing for mass production. The Chinese market is very important for Marvell. As part of the entire LED lighting industry, 90% of companies are in China. We will continue to invest in supporting resources to help promote the popularity of LED lighting and help China's LED lighting industry grow."
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