How to design reliable and safe power supply modules

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A power module is a power conversion device that can be directly installed on a printed circuit board. Based on the conversion method, it is generally divided into AC to DC or DC to DC. With the advancement of technology, power supply capacity has tended to become more modular and compact, which led to the emergence of power supply modules. It features a high degree of integration, with the main circuit of the switching power supply integrated into the chip, enabling broadband modulation, isolation, and various maintenance functions. As more and more people place higher demands on power supply modules, with greater emphasis on reliability, today the editor will provide insights on how to design high-reliability power supply modules! There are 4 key elements in the planning of high-reliability power supply modules: 1. Planning of surge protection circuits. How should surge protection circuits be designed? Depending on the application, can the positions of inductors and TVS diodes be adjusted? This can enable better utilization of the system and proper functioning of the circuits, thereby improving EMC performance. Pay attention to the design of the two-level surge protection circuits, as improper use can have the opposite effect. 2. Reduce the planned quantity: By properly controlling components to specified values, reducing the number of components can delay degradation, improve component reliability, and enhance power supply reliability. 3. Dual-power supply module planning: Attention should be paid to load balancing for the output of dual-direction power supply modules. When planning, pay attention to the uniform adjustment of output for the main and auxiliary circuits. 4. Component selection: The use of different components will result in varying module functions. For example, ceramic or electrolytic capacitors are generally used for capacitor selection, while tantalum capacitors have a long lifespan, high temperature resistance, and good performance, but they can easily break the circuit. Please note that different products have different usage methods.