Where is the ultra-thin LED screen module with high stability?
Release date：2018-05-11 09:13:11
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The latest Vicor PI3523 is a voltage step-down regulator with a rated input and output voltage of 48V and 3.3V, with an output current of 22A. One of its main applications is LED lighting. Travis Williams, the product manager of this new regulator, introduces us how Vicor meets the needs of modern LED applications.
Is this part developed specifically for lighting market?
Absolutely not! PI3523 is the third component of the general ZVS voltage step-down regulator series, which is suitable for various applications such as telecommunication, automobile, industrial test equipment, data center and communication. But its characteristic set is just the perfect combination of many LED lighting applications.
What challenges do designers of large LED display face?
LED display manufacturers are rapidly improving the cost performance of large screen televisions. Therefore, the requirement for engineers is to design systems that can provide higher resolution, real color and higher brightness in a more robust system. Fundamentally speaking, users want to obtain highly reliable and superior visual effects.
Although the economic conditions are not very mature, in the near future, people will start using LED instead of LED backlight LCD TV. The launch of PI3523 is a step towards a brighter future for LED displays.
Can you explain why PI3523 can meet the market demand of LED display?
The various characteristics of the regulator can simplify the design of LED display and increase its density. First, the output range of 2.2V to 4V is very suitable for power supply for 1.8V and 3.3V LED drivers. In general, different colors of LED require different voltages and different drives; the generality of PI3523 is sufficient to meet the needs of the most commonly used voltage range, which can further simplify the design of the system power supply.
Secondly, the power system designers who are engaged in LED application design also hope to increase the density. This is also a factor causing the power distribution from AC to 48V DC. Our regulator provides high density direct load point conversion, even when using a large step-down ratio. The industry wants to turn to 48V, but this development is hampered by the lack of suitable power products.
Although almost every company that I exchange with has research and development projects for this architecture, only a few LED display manufacturers are switching to 48V distribution. It is meaningful to try to avoid the cost of duplication of development, and most of the engineers I have exchanged say that if they are to maintain a competitive advantage, they will have to switch to 48V DC for the next two years, without it.
How can 22A current capacity achieve higher density in LED applications?
Increasing power is one of the biggest trends in LED applications. Designers are required to develop higher pixel density panels to achieve LED display that is comparable to high-definition televisions. But greater density means more LED is needed, so a regulator with greater current is needed. The latest ZVS step-down regulator is unique in that it can provide up to 22A current through a small package.
It must be understood that power density is proportional to the square of pixel density, so higher resolution requires greater power. We provide two times the power output in the package which is larger than the 10A series 40%. This increase in power density helps to achieve higher pixel density and resolution.
Are there other trends in the display market that PI3523 can achieve?
Yes！ The panel manufacturers are required to develop thinner and lighter panels. Obviously, the thinner the panel is, the higher the cost of installation, which means that weight is very important for modern LED panels. It should be noted that many LED panels are rented, not permanent, so installation costs are very important. Cumbersome panels are expensive to install, and the market requires the LED display to be as light and high-definition as modern televisions.
The LED panel has always used AC-DC brick type power supply. The power supply is thick and heavy. It can not use these products to make light and thin screens. However, the use of 48V DC distribution and Vicor ZVS Buck Regulators can achieve substantially reduced weight and very thin displays.
What else can push the development of LED display power supply system?
We have explored the demand for high power density and small size. Other electrical requirements are efficiency. Using a modern display screen, it will consume a lot of power. Heat dissipation can be challenging, so engineers hope to simplify the heat dissipation design by eliminating waste heat and reducing the power consumption of the display.
In addition, reliability is also a problem. Large screen uses dozens or even hundreds of small panels, even if a panel is faulty, it is also unacceptable. The current AC-DC brick type power supply may have a 500PPM failure rate. When switching to 48V, the designer can replace these components with a voltage regulator with a failure rate of only 5PPM, which greatly reduces the probability of the failure of the panel.
Why is there such a demand for the LED display?
Advertising is a traditional market. We will see more large-scale use of screens, especially small displays installed in stores or shopping malls. The number of applications increases with resolution and cost reduction. From local governments to national disaster monitoring centers, even weather stations and airport security checks, LCD monitors in command and control rooms are replaced by LED screens. Any unit or individual using video wall should consider switching to LED based, better and more reliable display.
How do we get a stable 48V DC voltage from AC?
HUAWEI has two kinds of power to choose from, one is the high reliability AC-DC power supply for the communication room, and the 48V output. There are three versions of 15A, 30A, 50A, this kind of power supply is particularly high, so the price is very high, the general output of 48V, 50A power, the price can be less than 1000RMB. It also has redundant functions. If a general industrial power source is selected, a good general need at least 3000RMB or more.
In addition, if you want to do ultra-thin power supply, you can also use AC to 48V module power, now a standard full brick (117*61*12.8MM) power supply in the market, power has 500W, 800W, 1000W and other versions of the optional. If to get more power power, multiple power modules can be used in parallel, and can be made redundant power. Source. The power supply of this module is higher than that of the upper one. Its characteristic is that the rest is small and stable and reliable.
Is this part developed specifically for lighting market?
Absolutely not! PI3523 is the third component of the general ZVS voltage step-down regulator series, which is suitable for various applications such as telecommunication, automobile, industrial test equipment, data center and communication. But its characteristic set is just the perfect combination of many LED lighting applications.
What challenges do designers of large LED display face?
LED display manufacturers are rapidly improving the cost performance of large screen televisions. Therefore, the requirement for engineers is to design systems that can provide higher resolution, real color and higher brightness in a more robust system. Fundamentally speaking, users want to obtain highly reliable and superior visual effects.
Although the economic conditions are not very mature, in the near future, people will start using LED instead of LED backlight LCD TV. The launch of PI3523 is a step towards a brighter future for LED displays.
Can you explain why PI3523 can meet the market demand of LED display?
The various characteristics of the regulator can simplify the design of LED display and increase its density. First, the output range of 2.2V to 4V is very suitable for power supply for 1.8V and 3.3V LED drivers. In general, different colors of LED require different voltages and different drives; the generality of PI3523 is sufficient to meet the needs of the most commonly used voltage range, which can further simplify the design of the system power supply.
Secondly, the power system designers who are engaged in LED application design also hope to increase the density. This is also a factor causing the power distribution from AC to 48V DC. Our regulator provides high density direct load point conversion, even when using a large step-down ratio. The industry wants to turn to 48V, but this development is hampered by the lack of suitable power products.
Although almost every company that I exchange with has research and development projects for this architecture, only a few LED display manufacturers are switching to 48V distribution. It is meaningful to try to avoid the cost of duplication of development, and most of the engineers I have exchanged say that if they are to maintain a competitive advantage, they will have to switch to 48V DC for the next two years, without it.
How can 22A current capacity achieve higher density in LED applications?
Increasing power is one of the biggest trends in LED applications. Designers are required to develop higher pixel density panels to achieve LED display that is comparable to high-definition televisions. But greater density means more LED is needed, so a regulator with greater current is needed. The latest ZVS step-down regulator is unique in that it can provide up to 22A current through a small package.
It must be understood that power density is proportional to the square of pixel density, so higher resolution requires greater power. We provide two times the power output in the package which is larger than the 10A series 40%. This increase in power density helps to achieve higher pixel density and resolution.
Are there other trends in the display market that PI3523 can achieve?
Yes！ The panel manufacturers are required to develop thinner and lighter panels. Obviously, the thinner the panel is, the higher the cost of installation, which means that weight is very important for modern LED panels. It should be noted that many LED panels are rented, not permanent, so installation costs are very important. Cumbersome panels are expensive to install, and the market requires the LED display to be as light and high-definition as modern televisions.
The LED panel has always used AC-DC brick type power supply. The power supply is thick and heavy. It can not use these products to make light and thin screens. However, the use of 48V DC distribution and Vicor ZVS Buck Regulators can achieve substantially reduced weight and very thin displays.
What else can push the development of LED display power supply system?
We have explored the demand for high power density and small size. Other electrical requirements are efficiency. Using a modern display screen, it will consume a lot of power. Heat dissipation can be challenging, so engineers hope to simplify the heat dissipation design by eliminating waste heat and reducing the power consumption of the display.
In addition, reliability is also a problem. Large screen uses dozens or even hundreds of small panels, even if a panel is faulty, it is also unacceptable. The current AC-DC brick type power supply may have a 500PPM failure rate. When switching to 48V, the designer can replace these components with a voltage regulator with a failure rate of only 5PPM, which greatly reduces the probability of the failure of the panel.
Why is there such a demand for the LED display?
Advertising is a traditional market. We will see more large-scale use of screens, especially small displays installed in stores or shopping malls. The number of applications increases with resolution and cost reduction. From local governments to national disaster monitoring centers, even weather stations and airport security checks, LCD monitors in command and control rooms are replaced by LED screens. Any unit or individual using video wall should consider switching to LED based, better and more reliable display.
How do we get a stable 48V DC voltage from AC?
HUAWEI has two kinds of power to choose from, one is the high reliability AC-DC power supply for the communication room, and the 48V output. There are three versions of 15A, 30A, 50A, this kind of power supply is particularly high, so the price is very high, the general output of 48V, 50A power, the price can be less than 1000RMB. It also has redundant functions. If a general industrial power source is selected, a good general need at least 3000RMB or more.
In addition, if you want to do ultra-thin power supply, you can also use AC to 48V module power, now a standard full brick (117*61*12.8MM) power supply in the market, power has 500W, 800W, 1000W and other versions of the optional. If to get more power power, multiple power modules can be used in parallel, and can be made redundant power. Source. The power supply of this module is higher than that of the upper one. Its characteristic is that the rest is small and stable and reliable.