In SMT chip fabrication, chip inductors are mainly responsible for choking, decoupling, filtering, and tuning. There are two main types of SMD inductors: wound and stacked. So how to choose the appropriate chip inductance in chip fabrication? The following introduces the selection principle of SMT chip processing chip inductance.

1. The width of the SMD inductor should be smaller than the width of the inductor to prevent excessive tensile stress caused by excessive solder during the cooling process.

2. Most of the existing chip inductors on the market have an accuracy of ± 10%. If the accuracy is higher than ± 5%, please order in advance.

3. Some SMD inductors can be welded by reflow soldering and wave soldering, but some SMD inductors cannot be welded by wave soldering.

4. During maintenance, patch inductors cannot be replaced solely by inductors. Simultaneously understand the frequency band of the chip inductor to ensure its performance.

5. The shape and size of the SMD inductor are basically similar, with no obvious marks on the shape. When manually welding or repairing, do not place or remove the wrong parts.

6. At present, there are three types of chip inductors: the first type is microwave high-frequency inductors. Suitable for frequencies above 1GHz. The second is the high-frequency chip inductor. Suitable for resonant circuits and frequency selection circuits. The third is universal inductance. Generally applicable to circuits of tens of megahertz.

7. Different products have different coil diameters, inductance, and DC resistance. In high-frequency circuits, DC resistance has a significant impact on the Q value.

8. The maximum allowable current is also an indicator of SMT inductance. When a circuit needs to withstand a large current passing through it, this capacitance indicator must be considered.

9. When using power sensing in DC/DC converters, its inductance directly affects the working state of the circuit.

10. Communication equipment operates in the frequency range of 150-900MHz, and SMT chip processing commonly uses winding inductors. In frequency circuits above 1GHz, microwave high-frequency inductors must be selected.