News

What should be noticed when purchasing a chip inductor? What should you pay attention to when purchasing a chip inductor?

1. According to the circuit requirements, the winding method is selected.
When winding a hollow inductor, it is necessary to follow the circuit request, the size of the inductance and the size of the bobbin diameter. The interwound coil is suitable for use in high frequency and ultra high frequency circuits. When the number of turns is less than 3 to 5 turns, the skeleton can be eliminated, and the Q value is high, up to 150-400. The stability is also very high. The single-layer tight-wound coil is used in short-wave and medium-wave circuits, and its Q value can reach 150-250, and has high stability.

2. Ensure the current carrying capacity of the coil and the strength of the machine, and select the appropriate wire.
The coil should not be wound with a fine wire to avoid increasing the coil resistance and making the Q value low. At the same time, the wire is meticulous, its current carrying capacity and machine strength are small, and it is easy to blow or break the wire. Therefore, under the condition of ensuring the current carrying capacity of the coil and the strength of the machine, it is necessary to select an appropriate wire winding.
3, the chip inductor winding coil tap should be marked. Coils with taps should have significant markings, making it easy to install and maintain.

4. The coil with different frequency characteristics, the core of the differential data is applied.
The coils of the difference in frequency of things have different characteristics. In the audio segment of the inductive coil, weekday application of silicon steel sheet or permalloy as the core material. Low-frequency ferrite is used as the core material, and its inductance is large, which can be as high as several hens to dozens of hens. Between several tens of thousands of Hz to several megahertz, such as the coil of the medium wave transmission section, a ferrite core is generally applied and wound with a plurality of insulated wires. When the frequency is higher than a few megahertz, the coil is applied with a high-frequency ferrite as a magnetic core, and an air-core coil is also commonly used. In this case, it is not advisable to use multiple strands of insulated wire, but it is suitable to use a single strand of coarse silver plated wire. At 100MHz or above, the ferrite core can no longer be used, and only the air-core coil can be used; if it is to be fine-tuned, the steel core can be used. The choke coil used in high-frequency circuits, in addition to the inductance and extra current should meet the requirements of the circuit, it must also be noted that its spread capacitance should not be too large.
The above is about the need to pay attention to the purchase of the chip inductor coil, the purchase should pay more attention.

PREVIOUS：What is an inductor? What is the inductance cNEXT：Frequency converter common sense_inductor coi