I. Power Module
Power supply modules are power supplies that can be directly mounted on printed circuit boards. Their key feature is the ability to power application-specific integrated circuits (ASICs), digital signal processors (DSPs), microprocessors, memory, field-programmable gate arrays (FPGAs), and other digital or analog loads. Generally, these modules are called point-of-use (POL) power supply systems or point-of-use power supply systems (PUPS). Due to the numerous advantages of their modular structure, modular power supplies are widely used in switching equipment, access equipment, mobile communications, microwave communications, optical transmission, routers, and other communication fields, as well as in automotive electronics, aerospace, and other industries.
In the field of switching power supply technology, the development of related power electronic devices and switching frequency conversion technology are proceeding simultaneously. These two aspects mutually promote each other, driving the development of switching power supplies at a double-digit annual growth rate towards lighter, smaller, thinner, lower-noise, higher-reliability, and more interference-resistant designs. Switching power supplies can be broadly classified into AC/DC and DC/DC converters. DC/DC converters have now achieved modularization, and their design technology and manufacturing processes are mature and standardized both domestically and internationally, gaining user acceptance. However, the modularization of AC/DC converters, due to their inherent characteristics, encounters more complex technical and manufacturing challenges during the modularization process. The following sections will describe the structure and characteristics of both types of switching power supplies.
The main function of a power module is voltage conversion, which can transform AC or DC power into the desired AC or DC power. For example, it can convert 220V AC mains power into 5V DC power. Because 220V AC power is high voltage, while electronic products are powered by low voltage, a conversion device is needed to convert the 220V AC voltage into low voltage.
Simply put, it's similar to a power adapter. Your electronic products need to be plugged in to function properly, but you can't just connect them directly to 220V, as that would burn them out. Therefore, a special conversion device is needed.
In recent years, especially due to the rapid development of data services and the continuous promotion of distributed power supply systems, the growth rate of modular power supplies has exceeded that of primary power supplies. Modular power supplies offer isolation, strong anti-interference capabilities, built-in protection functions, and are easy to integrate. With the widespread use of semiconductor processes, packaging technologies, and high-frequency soft switching, modular power supplies are achieving increasingly higher power densities, higher conversion efficiencies, and simpler applications.
II. Advantages of Power Modules
1. Simple design: A wide variety of power modules are available on the market, including AC-DC, DC-DC, and high-voltage modules. Simply select a suitable power module and add a few discrete components. The module features highly integrated circuits, making the design more compact. Suppliers also provide professional technical support and system solutions. The biggest difference from discrete modules is that manufacturers can provide models, peripheral circuits, and important data such as module parameter curves.
2. Cost and time savings: Power modules offer multiple input/output options and can be added repeatedly or crosswise to create modular power supplies, enabling multiple input/output channels. Compared to discrete power supplies, debugging is simpler and safer, greatly simplifying design and application and shortening development time.
3. High reliability: Modules generally employ automated processes to ensure quality and reliability. Power modules are designed and developed by a professional power supply R&D team using components selected according to stringent standards, and undergo comprehensive reliability and mass production testing. Discrete solutions, on the other hand, are more difficult to test in such depth.
4. High power, density, and efficiency: The modules generally use multi-layer PCBs with aluminum substrates, resulting in high power density and small size, saving system space. Currently, a quarter-brick DC-DC module can reach up to 1000W, a standard that discrete solutions struggle to achieve.
5. Easy to maintain and flexible in design. In product application, if a fault occurs, simply replace another module to restore normal operation. If the design needs to be changed during the design process, only the relevant modules need to be modified, without altering the overall power supply circuit.
6. Wide range of applications: It is now widely used in many fields such as instrumentation, automotive electronics, rail transportation, data communication, industrial automation, smart home, aerospace, military industry, scientific research experiments, shipbuilding, metallurgy and mining, power systems, medical electronics, security monitoring, new energy, petrochemicals, and handheld electronic devices.
