[Text / Chen Hengyu] The concept of no package, no heat dissipation, no power supply, is currently in the forefront of the industry. At this stage, de-energized linear ICs with low cost, simple circuit, convenient processing, and high degree of automation are favored. But de-energizing does not mean that there is no power supply, but the traditional AC/DC conversion is removed, and the LED driver circuit and the LED string circuit are combined.
However, the de-energized linear IC has four major problems, such as low power efficiency, high linearity of power supply regulation, easy flashing of line voltage fluctuations (flashing), and 100Hz stroboscopic, which is highly controversial. If these problems are not solved, the power IC can only be used in areas with low power and low performance requirements, and cannot be promoted on a large scale. This has caused the prejudice and misunderstanding of “de-energization†in the industry. To overcome these prejudices and misunderstandings, we must solve the above problems.
Firstly, improving the power efficiency and reducing the linearity of the power supply are the core issues of the power-off IC. Only in this way can the flexibility and stability of the LED Lamp be applied. Adopting innovative digital high-order segmentation method to increase the power efficiency of linear IC to over 90%, and with dynamic configuration, it can achieve constant power in a wide voltage range. It is because of the improvement of IC power efficiency that the single IC driver is improved. To 25W.
Secondly, the flashover is a problem that the current linear IC is often criticized. The voltage of the AC grid is high and low, which causes the LED lamp output to show visible flicker. This is a very dead user experience, and the end user will directly suspect the LED lamp. Reliability and security. The linear adjustment rate can be greatly improved by the high-voltage digital-analog technique, and the power is kept constant with the input voltage, and the voltage-flashing problem is solved from the root source. The line voltage compensation technology adjusts the output power according to the detection line voltage to completely overcome the voltage flash.
Of course, strobo is also regarded as the biggest problem in de-energizing products. Due to the characteristics of the AC, its brightness will change with the periodic changes of the mains, forming a strobe of the LED Light source 100HZ. In terms of removing 100Hz stroboscopic, the physical limit of photoelectric integration and de-energization is unavoidable. At present, a small capacitor must be added. The conventional power supply uses a capacitance of 20-40μF, which is bulky and needs to work all the time. To make it easy to wear out.
If the capacitor of the traditional power supply fails, it will face a dead light. The digital linear IC's valley-filling capacitor has a short working time and a long service life. When the valley-filling capacitor of the digital linear IC de-flashing scheme fails, it will not cause the whole lamp to fail.
In terms of certification, the IC of the power-off product itself is UL, CE, CCC certified, because it has no complicated EMI/EMC problems, the only difficult to achieve high-voltage insulation, if it is difficult to pass metal (such as aluminum) For certification, insulation is required, and composite materials such as heat-conductive plastic or glass are used to easily meet safety certification standards.
After solving the core problem of the above linear digital IC, it also has its innate intelligent dimming superiority, and it is easy to realize the dimming function. Without increasing the power cost of the LED luminaire, and without lowering the power performance index, the dimming mode can be realized conveniently and quickly by means of various dimming modes.
In terms of digital intelligent dimming, the IC external MCU intelligent dimming function, the main control chip can be programmed by the single-line SDQ protocol to realize the dynamic change of the brightness of the luminaire. Including LED dimming, WIFI, Bluetooth, infrared adaptive dimming, wireless control dimming, RGB lighting control, radar sensing dimming, etc., with the lowest system cost and maximum flexibility A complex intelligent dimming.
If the industry needs to be standardized, it must have a simple and efficient product to make production more efficient. At present, there are more than 20,000 LED manufacturers in China, and there will be no more than 5,000 in five years. After ten years, there may be only 500, and the survival of these large enterprises is the use of patch processing. Fully automated production, the lights will be made cheaper and cheaper, and then it will enter an era of efficiency.
LED lights should be civilian, so that everyone can afford, simple, stable, reliable, cost-effective solutions are the pursuit of the industry. De-powered high-voltage digital IC drivers have only been developed for a few years, which is relatively short compared to the development time of traditional power supplies for decades, but technology is dynamic and development. We must treat new things objectively and accept new technologies. I believe that going to power is no longer a development trend, but the future! (For details, please see "High-tech LED Good Products" February issue)
However, the de-energized linear IC has four major problems, such as low power efficiency, high linearity of power supply regulation, easy flashing of line voltage fluctuations (flashing), and 100Hz stroboscopic, which is highly controversial. If these problems are not solved, the power IC can only be used in areas with low power and low performance requirements, and cannot be promoted on a large scale. This has caused the prejudice and misunderstanding of “de-energization†in the industry. To overcome these prejudices and misunderstandings, we must solve the above problems.
Firstly, improving the power efficiency and reducing the linearity of the power supply are the core issues of the power-off IC. Only in this way can the flexibility and stability of the LED Lamp be applied. Adopting innovative digital high-order segmentation method to increase the power efficiency of linear IC to over 90%, and with dynamic configuration, it can achieve constant power in a wide voltage range. It is because of the improvement of IC power efficiency that the single IC driver is improved. To 25W.
Secondly, the flashover is a problem that the current linear IC is often criticized. The voltage of the AC grid is high and low, which causes the LED lamp output to show visible flicker. This is a very dead user experience, and the end user will directly suspect the LED lamp. Reliability and security. The linear adjustment rate can be greatly improved by the high-voltage digital-analog technique, and the power is kept constant with the input voltage, and the voltage-flashing problem is solved from the root source. The line voltage compensation technology adjusts the output power according to the detection line voltage to completely overcome the voltage flash.
Of course, strobo is also regarded as the biggest problem in de-energizing products. Due to the characteristics of the AC, its brightness will change with the periodic changes of the mains, forming a strobe of the LED Light source 100HZ. In terms of removing 100Hz stroboscopic, the physical limit of photoelectric integration and de-energization is unavoidable. At present, a small capacitor must be added. The conventional power supply uses a capacitance of 20-40μF, which is bulky and needs to work all the time. To make it easy to wear out.
If the capacitor of the traditional power supply fails, it will face a dead light. The digital linear IC's valley-filling capacitor has a short working time and a long service life. When the valley-filling capacitor of the digital linear IC de-flashing scheme fails, it will not cause the whole lamp to fail.
In terms of certification, the IC of the power-off product itself is UL, CE, CCC certified, because it has no complicated EMI/EMC problems, the only difficult to achieve high-voltage insulation, if it is difficult to pass metal (such as aluminum) For certification, insulation is required, and composite materials such as heat-conductive plastic or glass are used to easily meet safety certification standards.
After solving the core problem of the above linear digital IC, it also has its innate intelligent dimming superiority, and it is easy to realize the dimming function. Without increasing the power cost of the LED luminaire, and without lowering the power performance index, the dimming mode can be realized conveniently and quickly by means of various dimming modes.
In terms of digital intelligent dimming, the IC external MCU intelligent dimming function, the main control chip can be programmed by the single-line SDQ protocol to realize the dynamic change of the brightness of the luminaire. Including LED dimming, WIFI, Bluetooth, infrared adaptive dimming, wireless control dimming, RGB lighting control, radar sensing dimming, etc., with the lowest system cost and maximum flexibility A complex intelligent dimming.
If the industry needs to be standardized, it must have a simple and efficient product to make production more efficient. At present, there are more than 20,000 LED manufacturers in China, and there will be no more than 5,000 in five years. After ten years, there may be only 500, and the survival of these large enterprises is the use of patch processing. Fully automated production, the lights will be made cheaper and cheaper, and then it will enter an era of efficiency.
LED lights should be civilian, so that everyone can afford, simple, stable, reliable, cost-effective solutions are the pursuit of the industry. De-powered high-voltage digital IC drivers have only been developed for a few years, which is relatively short compared to the development time of traditional power supplies for decades, but technology is dynamic and development. We must treat new things objectively and accept new technologies. I believe that going to power is no longer a development trend, but the future! (For details, please see "High-tech LED Good Products" February issue)
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