Chip inductors, also known as chip inductors, are used in circuits XC7K410T-2FFG900I Inductive devices. Its name comes from its appearance and shape, which is in a sheet structure. In electronic circuits, chip inductors are usually used for filtering, isolation, coupling, common mode suppression and other functions.
1、 Basic structure:
Chip inductors are usually stacked by a plurality of thin magnetic conductive materials. Each slice is wound with a winding, which is separated by highly conductive magnetic materials to reduce mutual inductance. The thin magnetic conductive material can be ferrite, ferrite core or magnetic film. The winding is usually made of copper wire or aluminum wire, and the conductor is formed by winding or printing on the magnetic conductive material.
2、 Advantages:
1. Compact structure: Chip inductors are stacked by multiple sheets, small in size, suitable for use in electronic devices with limited space.
2. Light weight: due to the use of thin slice structure, the weight of the chip inductor is relatively light.
3. Large self inductance: chip inductors are composed of multiple windings, which can provide large self inductance, and are suitable for applications requiring high self inductance.
4. Low loss: The chip inductor is made of highly conductive magnetic materials, which can reduce energy loss.
3、 Disadvantages:
1. Low inductance value: due to the limitation of small size, the inductance value of chip inductor is relatively low, which is not suitable for applications requiring high inductance value.
2. Poor temperature characteristics: chip inductors have poor temperature characteristics. Temperature rise will lead to changes in inductance value and affect the stability of the circuit.
4、 Operating principle:
Chip inductors convert electric energy into magnetic energy and store it in the magnetic field through the coupling of winding and magnetic materials. When the current passing through the winding changes, the magnetic field will also change, thus generating induced electromotive force.
5、 Classification:
Chip inductors can be classified according to their use, structure and operating frequency. It can be divided into filter inductor, power inductor, signal inductor, etc; According to the structure, it can be divided into spiral wound inductors and multi-layer inductors; According to the working frequency, it can be divided into low-frequency chip inductor and high-frequency chip inductor.
6、 Manufacturing process:
Manufacturing process of chip inductor:
1. Material preparation: the main materials for manufacturing chip inductors include magnetic materials, conductor materials and insulating materials. Ferrite or magnetic ceramics are usually used as magnetic materials, copper foil or silver paste is often used as conductor materials, and polyimide or polyamide can be used as insulation materials.
2. Cutting magnetic material: cut the magnetic material into the required shape and size. Common cutting methods include stamping, laser cutting and EDM.
3. Making winding: winding conductor material into spiral winding. Conductor materials can be prepared by film deposition, imprinting or cutting processes.
4. Assembly: assemble the cut magnetic material and the wound winding. They are usually held together by adhesive or welding in a manner of stacking or overlapping.
5. Encapsulation: Encapsulate the assembled chip inductor to protect the inductor from the impact of the external environment. Epoxy resin or thermoplastic is often used as packaging material.
6. Testing and quality control: test the manufactured chip inductor to check whether its inductance value, quality factor, DC resistance and other parameters meet the requirements. Through strict quality control, the stability and reliability of inductor performance are ensured.
7、 Difference between chip inductor and chip magnetic bead:
Chip inductors and chip magnetic beads are electronic components, which are used as inductance components in circuits. Their main differences are as follows:
1. Different structures: Chip inductors are generally composed of one or more layers of coils, which are usually wound by wires and placed on a base of insulating materials. The chip magnetic bead is a cylindrical or spherical structure made of a magnetic material.
2. Different functions: Chip inductors are mainly used to store and release energy. Through the principle of electromagnetic induction, they can convert electric energy into magnetic energy or magnetic energy into electric energy. It can be used for filtering, regulating voltage and current and other applications. The chip magnetic bead is mainly used for electromagnetic interference (EMI) filtering to improve the anti-interference ability of the circuit by absorbing and suppressing high-frequency noise.
3. Different parameters: the main parameters of chip inductance include inductance value (unit: Henry), current capacity (unit: Ampere) and resistance value (unit: Ohm). The main parameters of the chip magnetic bead include the frequency range (unit: Hz), impedance (unit: ohm) and maximum current capacity (unit: ampere).
4. Different application fields: due to differences in functions and parameters, chip inductors and chip magnetic beads are also different in application fields. Chip inductors are commonly used in power supply, circuit board, communication equipment and other fields for voltage conversion, current filtering and signal transmission. Chip magnetic beads are mainly used in RF and high-frequency circuits of electronic products to reduce electromagnetic interference and improve signal quality.
8、 Development history:
The development of chip inductors can be traced back to the early 20th century. The earliest chip inductors were developed on the basis of the principle of electromagnetic induction. With the rapid development of electronic technology, the manufacturing process and performance of chip inductors have been continuously improved and enhanced.
In the 1950s, the manufacturing process of chip inductors gradually matured and were widely used in electronic equipment. In this period, chip inductors were mainly assembled into chip structures by means of coil winding and stacking or overlapping.
In the 1980s, with the development of microelectronics technology, chip inductors began to be manufactured using the printed circuit board (PCB) process, greatly improving production efficiency and consistency. In addition, the size of chip inductors is becoming smaller and smaller, and gradually developed into miniaturized components.
In recent years, with the rise of high frequency and high-performance applications such as wireless communication, electric vehicles and wearable devices, the performance requirements for chip inductors have become increasingly high. Manufacturers constantly improve material selection, process flow and design methods to meet the needs of different fields. For example, new magnetic materials and conductor materials are used to optimize the winding structure and packaging technology to improve the frequency response and energy conversion efficiency of inductors.
