How to Design a Safe and Reliable Power Module
Power modules are power converters that can be mounted directly on a printed circuit board. It is generally classified as AC-DC or DC-DC according to the conversion method. With the development of technology, power supply capacity tends to be modularized and miniaturized, so power supply modules appear. It has a high degree of integration, and integrates the main circuit of the switching power supply into the chip, which can realize broadband modulation, isolation and various maintenance functions. As more and more people have higher and higher requirements for power modules and higher reliability requirements, the editor of Beijing Steady Electronics will share with you how to design safe and reliable power modules.
Four elements of high reliability power module planning:
1. Anti-surge maintenance circuit planning
How to design the anti-surge protection circuit, it may be possible to adjust the position of the inductor TVS tube for different applications, which can make the system better use and correctly use the circuit, thereby better improving the EMC performance. Pay attention to the design of the two-level anti-surge protection circuit, if used improperly, it will be counterproductive.
2. Reduce the amount of planning
Correctly controlling components to specified values, reducing the number of components can delay degradation, improve component reliability and improve power supply reliability.
3. Dual power module planning
The output of the bidirectional power supply module should pay attention to load balancing. When planning, pay attention to the main and auxiliary circuits to adjust the output evenly.
4. Component selection
The use of different components will result in different module functions. For example, ceramic or electrolytic capacitors are generally used for capacitor selection, while tantalum capacitors have long life, high temperature resistance, function well, but are easy to break the circuit.