How about the design margin of power supply for LED power driver

How about the design margin of power supply for LED power driver? The cost of power supply for "qx2qxs0g7" LED street lamp is still high. Therefore, how to reduce the cost of power supply and improve its durability is the key to its original production planning. If the planned LED lamp power is not very high, electronic advocates the use of integrated gold-oxygen half-field-effect transistor LED driver commodities, because the advantages of doing so are that integrated gold-oxygen half-field-effect transistor has less on-resistance and less heat than discrete ones. In addition, integrated gold-oxygen half-field-effect transistor is the combination of controller and FET. Usually it has the function of overheating shutdown. When the gold-oxygen half-field effect transistor is overheated, it will actively turn off the circuit to maintain the LED lamps. This is very important for the LED lamps, because the LED lamps are usually very delicate and difficult to heat the air. Sometimes led burns people because of overheating, but our plan has never been like this.

As far as possible, using single-stage architecture circuit, LED street lamp power supply shows that some led circuits choose two-stage architecture, that is, "PFC + blocking DC/DC converter" architecture, such planning will lead to circuit power decline. For example, if the power of PFC is 95% and that of DC/DC is 88%, the power of the whole circuit will decrease to 83.6%. PI device integrates PFC/CC controller, a 725V gold-oxygen half-field-effect transistor and gold-oxygen half-field-effect transistor driver into a single package, which improves the power of the driving circuit to 87%.

LED street lamp power supply points out that such equipment can greatly simplify the planning of circuit board and save up to 25 components used in traditional barrier flyback planning. The omitted components include high voltage and large capacity electrolytic capacitors and optocouplers.

Electronics believe that the two-stage structure of LED is only applicable to the old-fashioned driver which needs to use the second constant current drive circuit to drive led by PFC. But these plans have expired and no longer have economic benefits. Therefore, the best choice is single-stage planning. The use of gold-oxygen half-field effect transistor equipment can improve durability, while single-stage planning can reduce costs and play a dual role. How to Identify the Quality of LED Street Lamp Power Supply

At present, there are many kinds of LED street lamp power supply on the market, and the quality is not uniform. So the following Electronics will explain some points to identify the quality of LED street lamp power supply.

1. Does the power supply use high-quality components?

LED street lamp power supply is mainly used in outdoor environment, to withstand the harsh environment of wind, rain, thunder and lightning for a long time, the highest temperature can reach 50 C, and the lowest temperature may also reach - 40 C. LED light source belongs to semiconductor light source. Its luminous characteristics determine its failure rate is quite low, and the failure rate of the connection is also quite low. Therefore, the quality of LED driving power directly determines the life of the whole street lamp, and it is also the core part of the LED street lamp industry. At present, there are numerous enterprises producing LED power supply in China, but because of technical strength, cost control and other reasons, quality problems often occur. Once the street lamp is installed, maintenance is non-productive, and requires a lot of manpower and material resources. Major street lamp manufacturers complain about this.

According to electronics, good design is one of the key factors for the quality of LED driving power supply, and LED power supply components are the prerequisite for high reliability. At present, the key components of power supply are still some passive components and power components, such as capacitors, inductors, MOS, etc. The quality of these components is still the best in American and Japanese manufacturers. There are still gaps in durability, anti-interference, environmental adaptability and quality between the platform system and domestic products. At present, all LED street lamp power supply products in the United States and Japan adopt electronic components of the first-line factories. Good design ensures that the power supply can operate normally for a long time at - 40 C to 60 C. At present, the actual failure rate of large-scale used products is less than three in ten thousand, which is in the leading level in the industry.

2. What's the price? What is the price?

At present, the market competition of LED street lamp power supply is fierce. Although the price is not the final determinant in this quality-first product market, higher performance-price ratio can provide more profit space and competitive advantage for street lamp manufacturers under good quality. Electronics relies on more than ten years of industry experience in the power industry, and is itself an international component agent, eliminating agent profits and logistics costs. At present, many domestic manufacturers of LED street lamp power supply are purchasing components through domestic component agents. The purchasing cost is relatively high. Although a few enterprises can strictly control the cost, compared with others, the cost of electronic LED street lamp power supply still has great advantages. Please contact the electronic market department for the specific scheme and price.

3. How about the design margin of LED street lamp power supply?

At present, the application environment of LED street lamp sold in domestic market is very complex. The main reason is that the supply voltage is unstable. The actual input voltage often has a great deviation under the condition of ordinary city power supply. Moreover, various unsafe factors such as surge impact always affect the normal operation of LED power supply, which requires a certain design margin of power supply. At present, the design margin of the mainstream LED street lamp power supply in the market is generally about 40%. The design team of electronic power supply takes the lead in introducing the lowest design margin of 60% components in the industry to ensure the high reliability demand of LED street lamp, while reserving the margin of key components is more sufficient. As the head of the R&D team of electronic technology said, "In the design of LED street lamp power supply, we only save cost in the unrelated link of reliability, as long as it involves reliability."