Judgment of the quality of integrated inductor:
For the chip mounted inductor, the reading should be zero at this time. If the multimeter reading is too large or infinite, it indicates that the inductor is damaged.
Inductance measurement: Set the multimeter to the buzzer diode position, place the probes on the two pins, and observe the reading of the multimeter.
For inductance coils with more turns and thinner wire diameters, the reading can reach tens to hundreds, and usually the DC resistance of the coil is only a few ohms.
The damage manifests as scalding or obvious damage to the inductance magnetic ring. If the inductance coil is not severely damaged and cannot be determined, the inductance can be measured using an inductance meter or judged using a replacement method.
The integrated inductor is suitable for damp and dry environments, high and low ambient temperatures, high-frequency or low-frequency environments, and should pay attention to whether the inductor exhibits inductive or impedance characteristics.

Selection of integrated inductor:
The production of integrated inductors is determined by the selection of magnetic cores. The following explains the advantages of manganese zinc magnetic cores and their applications in inductors:
Manganese zinc magnetic core is a type of soft magnetic core with high initial permeability. The surface resistance of this product is low, and the higher the initial permeability, the lower the surface resistance. Therefore, it is generally used in circuits below 1MHz.

Main purpose:
The initial permeability of this material is generally around 2000-3000, with a high saturation magnetic flux density and low losses, making it one of the most ideal power inductor cores at around 100KHz.
The nickel zinc core is a soft ferrite core. The initial permeability of the nickel zinc core is generally 5~1500. Due to its high surface resistance, the core is generally used in medium and high frequency circuits.
Main performance: EMI materials rely on magnetic and electrical losses to absorb electromagnetic energy and absorb interfering electromagnetic waves. Therefore, they generally require high impedance under conditions of 10-100MHz and are generally used for magnetic beads.