Dismantle and learn the secrets inside the power supply that you don't know

　　The power supply is the most important accessory of the platform. It provides power for the CPU, motherboard, graphics card, hard disk and other hardware. A good power supply will make consumers feel more at ease when using it. If the stability of the power supply is not good, the computer may restart at best, or the hardware may be damaged at worst. For players, these are catastrophic consequences.

　　How can a power supply achieve a good power supply? Solid materials are naturally the most basic, which is not only the basis for the stable operation of the power supply, but also the guarantee for achieving high-quality power supply. If the materials are not guaranteed, even if the structural design is excellent, it will not be fully utilized, and it may even affect the normal operation of the power supply.

　　What kind of power supply is considered to be solid in material, what kind of power supply can provide stable operation, and what kind of power supply can achieve high-quality power supply? Many consumers have had such questions. Because consumers often do not have the opportunity to open the inside of the power supply, today we will analyze the unknown secrets inside the power supply.

　　Page 2: Efficient Active PFC Design for Filtering EMI Circuits

　　EMI filter circuit is the first filter circuit in the power supply, and it can also be said to be the first barrier of the power supply. Its main function is to filter out high-frequency clutter and interference signals in the power grid, and at the same time prevent the electromagnetic radiation generated in the power supply from leaking to the outside, so as to reduce the interference of the power switch itself to the outside world.

　　EMI Circuit

　　If the power supply does not have an EMI filter circuit, the electromagnetic radiation generated by the power supply will affect the normal use of various accessories in the platform. At the same time, these electromagnetic waves will also cause a certain degree of harm to the human body and affect the health of users.

　　Power supply main capacitor and PFC inductor

　　The active PFC architecture is the architecture used by most mainstream power supplies today, and is also an architecture that better reflects the energy-saving effect of the power supply compared to the passive PFC. As the technology matures, the active PFC architecture can easily produce mainstream wattage-level 80plus white label, bronze, silver, gold, platinum and other power supplies.

　　Page 3: LLC improves efficiency and low-voltage filtering is purer

　　LLC resonance is a new design that is becoming popular now. Its biggest feature is that it can easily achieve high conversion efficiency at a low cost. The circuit contains a resonant inductor and a resonant capacitor. LLC can fully improve the conversion efficiency and ensure stability. Many gold-medal power supplies use this structure.

　　Main transformer and resonant inductor

　　Low voltage filter circuit (secondary side)

　　The secondary side is actually the low-voltage filter output part of the power supply. After the internal conversion and rectification of the power supply, the current is filtered to ensure the output of pure current for each part of the platform. Basically, most power supply circuits contain coils and low-voltage filter capacitors . The general solution is two coils of different sizes, in which the large coil is responsible for the conversion output of +12V and +5V, and the small coil is responsible for the output of +3.3V alone. The low-voltage filter circuit uses a filter capacitor with higher capacity .

　　Summary: It is difficult for ordinary users to test the performance of power supplies by themselves, but understanding the materials used and the structural design of some major components can still be of great help in choosing a good power supply. Players may wish to learn about the relevant knowledge, so that it will be easier to choose a power supply.