Reasons and solutions for inductor whistling 2

2、 Circuit design and layout

1. Circuit resonance

When there is resonance between inductors and capacitors in a circuit, it can cause high-frequency oscillations, resulting in whistling sounds. diode

Solution: Select appropriate inductors and capacitors according to the requirements of the circuit to avoid resonance phenomena.

2. Circuit layout

The layout of components in a circuit can also affect inductor howling. For example, when the distance between an inductor and other components (such as transistors, diodes, etc.) is too close, electromagnetic interference can be generated, causing howling sounds.

Solution: Reasonably layout circuit components and try to avoid the distance between inductors and other components being too close.diode

3、 Other factors

1. Power supply noise

When the power noise is high, it can also affect the operation of the inductor and produce a whistling sound.

Solution: Add a power filter to reduce power noise.

2. Temperature changes

When the ambient temperature of an inductor changes, it will cause a change in its capacitance and inductance values, resulting in a whistling sound.diode

Solution: Choose an inductor that is suitable for the environment, such as one with good temperature stability.

In summary, there are many reasons for inductor whistling, mainly including the structure and materials of the inductor itself, the design and layout of the circuit, and other factors. There are different solutions for different reasons. In practical applications, we should choose appropriate inductors and design circuits reasonably based on specific situations, in order to avoid or reduce the occurrence of inductor whistling.diode