SMD Inductors

SMD inductors are also called power inductors, high current inductors and surface mount high power inductors. It has the characteristics of miniaturization, high quality, high energy storage and low resistance. SMD inductors are magnetic induction components made of wire; it is one of the common passive components.

1. Shielded chip inductors can shield the instability of current in some circuits, and play a good blocking role. The metal shield with complete shielding inductance surrounds the positively charged conductor, and it will be induced inside the shield A negative charge equal to a charged conductor.

2. The function of the chip inductor: the function of DC resistance to AC is mainly to isolate the AC signal, and at the same time form a resonant circuit with filtering or capacitors, resistors, etc. The role of tuning and frequency selection inductors.

3. The inductance coil and the capacitor can be connected in parallel to form an LC tuning circuit. In the circuit, the power inductor plays a role of resonance tuning.

4. Any current in the circuit of the SMD inductor is a magnetic field generated by the circuit where the inductor is located, and the magnetic flux of the magnetic field acts on the circuit. At this time, the circuit is loaded with a certain amount of magnetic flux; this is generally said in engineering; the more saturated the magnetic flux; the more stable the performance of the inductor in the circuit.

5. When the current passing through the chip inductor changes, the DC voltage potential generated in the chip inductor will prevent the current from changing. Prevent the changing current from outside the circuit; because the changing current may be a large current; if the general circuit cannot withstand it, it may impact other components in the circuit; the entire circuit substrate is burned.

6. When the current through the chip power inductor increases, the self-induced electromotive force and electricity generated by the inductor. When the current through the inductor decreases, the self-induced electromotive force is in the same direction as the current, preventing the current from decreasing and releasing the stored energy at the same time To compensate for the decrease in current. The flow direction is opposite to prevent the increase of current.

7. At the same time, part of the electric energy is converted into magnetic field energy and stored in the inductor; therefore, after inductance filtering, not only the pulsation of load current and voltage is reduced, the waveform becomes smooth, and the conduction angle of the rectifier diode is increased.

8. The function of SMD power inductors is different from that of general SMD inductors. The general SMD inductance has a single function in the circuit; it also plays the role of EMC; EMI and has the function of power energy storage.

9. If the metal shield is grounded, the positive charge on the outside will flow into the ground, and there will be no electric field on the outside.