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Why does the switch power supply make a strange hiccup sound?

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.03.27
In the operation of electronic devices, we often rely on various power sources, and switch mode power supplies have been widely used due to their high efficiency and lightweight characteristics. However, perhaps you have noticed that in some cases, the power switch can produce a strange hiccup sound. This has sparked our curiosity about the internal mechanisms of switch mode power supplies: why does it hiccup? What factors are causing this phenomenon?



Capacitance issue:

The capacitors in the power supply may experience voltage fluctuations due to aging, damage, or poor quality, causing hiccups. This problem may be caused by the evaporation or leakage of electrolyte inside the capacitor.

Inductance issue:

If there is a short circuit, open circuit, or damage to the inductive components in the power supply, it may cause current fluctuations and produce sound. This is usually related to the vibration emitted by the coil in the inductor.

Power load issue:

Excessive or sudden changes in load may cause unstable power output and produce sound. This is due to untimely power frequency adjustment caused by load changes.

Temperature issue:

High temperatures may cause a decrease in the performance of internal components in the power supply, resulting in abnormal sounds. It is possible that temperature has caused physical changes in the components or increased internal electronic noise.

Loose components:

Internal components of the power supply, such as capacitors or inductors, may cause vibration and sound if they are loose or poorly connected. This may be caused by prolonged operation of the equipment or external shocks.

Design issues:

The power supply design is unreasonable or low-quality components are used, resulting in instability of the power supply and causing hiccups. Design issues may involve feedback loops, adjustment processes, and other aspects.

After gaining a deeper understanding of the working principle of switch mode power supplies and the factors that may cause hiccups, we have found that in the world of power supplies, every tiny component can have a significant impact on its performance. During the use of switch mode power supplies, we should remain vigilant and pay attention to the load, temperature, capacitance, and inductance of the power supply to ensure stable and efficient operation of the equipment, and to overcome the problem of hiccups. Through scientific and reasonable use and maintenance, we can better enjoy the convenience and efficiency brought by electronic technology.
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