Challenges in Power Module Design
Power module is a development trend of switching power supply. With the development of power supply technology, it is possible to realize modularization of switching power supply. The power supply is very important in the system design, because if the power supply is not good, it will lead to the instability of the electronic equipment system. Let's discuss the design of the power module and briefly analyze the future development trend.
In recent years, the demand for power modules has continued to develop in the direction of high power density, high efficiency, and high current and low voltage. The design of the isolation module mainly adopts traditional circuit topologies such as single-ended flyback, single-ended forward, combination of forward and flyback, push-pull, bridge conversion, etc. The non-isolated module adopts BUCK, BOOST, etc. Regarding high efficiency, in order to improve efficiency, various soft-switching technologies can be combined, including passive lossless soft-switching technology, active soft-switching technology, such as ZVS/ZCS resonance, quasi-resonance, constant-frequency zero-switching technology, zero-voltage, zero-current Conversion technology and synchronous rectification technology. Regarding the large current, multi-phase conversion can be used in order to increase the output current.
In addition to developing new components and new technologies, how to combine and optimize these existing technologies to achieve high power density and high efficiency is also a major challenge in module power supply design. Taking the brick power module as an example, the current mainstream is the 1/8 brick power module. To further optimize the 1/16 brick power module products, the efficiency must be further improved.
In addition, the change of power supply products from 1/8 brick to 1/16 brick is not only a matter of volume, but the change of a product involves many aspects. High power density puts forward higher requirements for R&D, production process, quality assurance, etc. It is a difficult challenge to reduce product volume while maintaining high power output.