The circuit topology in which the module power supply is thinned, modularized, standardized, and combined with building blocks has been increasingly used. How to agile the high-quality, high-reliability, low-cost module power supply to improve product competitiveness, we also need continuous improvement in circuit, material, production process and other aspects.
There are hundreds or even hundreds of modular power supply R&D and production companies in our country, mainly small enterprises and private enterprises. The overall competitiveness is not very large, the industry concentration is low, and the power market can rank in the market. The market share of the top 10 switching power supply manufacturers is also less than 60%, and most of them are international brands that we are familiar with, and there are fewer domestic brands. Especially in the low-end module power supply market, the industry basically shows the status quo of complete competition. In the high-end power market, subject to the constraints of corresponding technologies and processes, the market concentration is high, and the market share is occupied by leading international brand companies. As a Chinese company, it is a topic of concern to everyone in the industry to maintain strong competition in the low-end market or to enter the high-end market and international brands. The following will analyze the development trend of DC-DC module power supply from several aspects, and explore the hot topics.
l Change of product ideas
Nowadays, the competition in the domestic market is no longer completely the competition of product quality and performance. It has begun to shift to the competitive advantage of product prices. The continuous innovation breakthroughs in circuit design, material selection, production process and so on must be placed at the top of the list. Seeking a more concise, newer, and lower-cost solution, if it is still in compliance with the competition, it will only be lower and lower profits, and will eventually be eliminated. And in the new situation society, it is no longer completely big fish to eat small fish, more is the form of fast fish to eat slow fish, if you find a new market not to quickly seize, then quickly seized the opportunity by the opponent You become very passive and can't even sneak in to give up; if you find a new circuit without applying for protection, you will soon have to worry about redesigning or spending a lot of usage rights.
l Innovative design of the circuit
The circuit scheme of the power module has become more and more mature. For different power module performance requirements, the selected circuit scheme has been basically fixed. To make the product stand out, it is necessary to make a research breakthrough in the design circuit, such as lossless. Circuits, soft switches, new circuits, etc., like a new type of converter "switched capacitor converter", eliminating the need for a core transformer, the size of the product can be designed very small. In other words, without losing the performance of the product, the circuit should be simplified, reduce product cost, optimize circuit parameters, and improve performance and reliability. It is said that the quality of the product is designed. The production process design of the product must consider the productivity, and it must meet the requirements of automatic production, avoiding manual participation as much as possible. The quality of all the people involved in the process cannot be guaranteed and the cost is high.
Figure 1 Step-down switched-capacitor converter topology
l Innovative use of electronic materials
The development of science and technology in today's society is changing with each passing day. The time for updating electronic components is becoming shorter and shorter. At present, there are some high-tech, miniaturized, low-power, high-integration and low-cost materials, so that power module products can be designed. Higher power density, higher performance quality, and lower cost. For example, the current mainstream products of chip-type RC components are 0603 type and 0402 type, which are developing toward the smaller 0201 type and 01005 type. For example, 106K chip ceramic capacitors have been made into 0805 package; SO- 8 package IC's wire bonding process changed to a set process technology, can be designed into TSOT23-8 smaller package, low power consumption, better power density, more than 2 times; and silicon carbide diode (SiC) extremely short The recovery and reverse recovery time, lack of forward recovery and reverse recovery charge characteristics make the material smaller in package size, more efficient, and more compact in product design.
As well as the PWM control chip used in the power supply design of the isolated flyback DCDC module, the domestic enterprises basically adopt the very mature and popular series of chips such as 2843 or 3843. However, the functions of these chips can not keep up with the development needs of the module power supply, and the functions are complete. High power density, low cost, and high electromagnetic compatibility are the inevitable development trends of module power supplies. Therefore, some new technologies such as second-degree integration and packaging have emerged, and some peripheral functional circuits are fully integrated in the chip, even including main power devices, such as slope compensation, undervoltage protection, short circuit protection, remote control, and switching tubes. It constitutes an integrated chip or module with perfect function, few peripheral devices and very low cost, or directly purchases a bare chip, is assembled into a functional module, packaged, soldered to a printed board, and then bonded. This is also the current research hotspot. Domestic mainstream enterprises and international brands, as well as some IC companies have invested a lot of manpower and financial resources to design and develop materials in this direction. Like in terms of low power, many IC companies (such as TI) are now involved in the power industry. They are committed to packaging low-power power supplies into ICs, and then they can produce and sell module power supplies themselves. The cost can be very low, which will give power. The company has a very big impact, and it has to be whispered to find IC companies to cooperate. This may be the development trend of module power supply.
l Electromagnetic compatibility and certification requirements
At present, the perfect electromagnetic compatibility standard and certification system has been established in the world. The electromagnetic compatibility and safety certification of international products have strict design requirements, and as important key performance requirements, our products have not begun to pay attention to this. In the electromagnetic compatibility test and the huge cost of safety certification, small enterprises can not afford, the reluctance of Chinese enterprises, or the lack of clear requirements of domestic products, resulting in China's products can not be comparable with international products, can not sell abroad Market, because EMC standards and certification are the threshold for foreign markets. Fortunately, China has also announced the catalogue of necessary electromagnetic compatibility certifications, which laid the foundation for the national industry to participate in the international competition, and will also promote the importance and construction of the module power supply enterprises for electromagnetic compatibility standards and certification.
We specialize in cable assembly overmolding. Our customized molded cables are built precisly following customers' spec.Experienced proposal can be offered to customers for evaluation by considering stable quality and competitive price.
Custom cable overmoldings improve the quality, look and functionality of many electrical cables. From battery interconnects and molded plugs to custom molded plugs and many other custom designed assemblies – ETOP is a premier custom cable overmolding supplier to OEMs.
we have internal design, prototype, and manufacturing the widest range of molded harnesses, also a diversified line of strain / flex reliefs and grommets.Molded Cables,Stranded Round Molded Cables,Molded Patch Cord Cable,4 Pole Waterproof Molded Cable,Waterproof Connectors
ETOP WIREHARNESS LIMITED , https://www.wireharnessetop.com