Chip Inductors Information

Chip inductors are manufactured using semiconductor material. General specifications, performance specifications and features are all important parameters to consider when searching for chip inductors.

General specifications that are important to consider when searching for chip inductors include technology, core material, packing method, and application.  Technology choices include solenoidal (standard) core, toroidal, bobbin core, wirewound, multilayer, and laminated. Solenoidal cores are rod-shaped cores. Toroid chip inductors look exactly like doughnuts and come in various diameters, thickness, permeability and types depending upon the frequency range of interest. They have a high inductance for the physical space occupied. A bobbin core is a chip inductor with a core with the shape of a bobbin or spool.  Bobbin cores are available with and without leads and in the axial and radial form. A wirewound inductor is an inductor with a core made of wound wires. Multilayer inductors are inductors constructed by layering the coil between the layers of core material.  The coil normally consists of a bare metal material (no insulation). This technology is normally referred to as "non-wirewound". The inductance value can be made larger by adding additional layers for a giving spiral pattern. Laminated chip inductors are ferrite beads with a core that is constructed by stacking multiple laminations on top of each other.  The laminations can be of a variety of materials and thicknesses. Coils can be wound on various core materials, the most popular being iron (or iron alloys, laminations, or powder) and ferrite, a black, nonconductive, brittle magnetic material. These are all ploys to multiply the inductance of a given coil by the "permeability" of the core material. The core may be in the shape of a rod, a toroid (doughnut), or other shapes. Additional core materials include air, ceramic, phenolic, and MPP, molypermalloy powder.  Packing methods for chip inductors include tape reel, tray, tube, or bulk pack.  Common applications include common mode choke, general purpose, high current, high frequency, power inductor, and RF choke.

Common features for chip inductors include shielding and molded case. A shielded inductor is designed for its core to contain the majority of its magnetic field. An inductor with a molded case has a case that has been formed via a moding process.  Common molding processes include injection and transfer molding. Molded inductors typically have well defined body dimensions that consist of smooth surfaces and sharper corners as compared to other case types.

• SOI CMOS Technology for RF System-on-Chip Applications (.pdf)
  CMOS technology is one of the most promising choices for RF applications. Its highly integrated nature provides true RF system-on-chip integration.Silicon-oninsulator (SOI) CMOS offers specific additional design advantages that include a significant reduction in cross-talk between RF and digital...
• AN0014 X2Y Balanced Line EMI Chip Reliability and Performance Data
  in one device. Replaces chokes, inductors, and capacitors with an SMT single chip solution. Reduces 2 or more components with one device. Matched capacitance line-to-ground on both lines. Low inductance due to cancellation effect. Differential and common mode attenuation. Effects of temperature...
• Automotive Crossover Filters
  . CWS-5323A. CWS-5XXX SERIES HIGH CURRENT HELICAL WINDING POWER INDUCTORS$5.00. Home. Need Power Inductors? CWS delivers the finest in surface mount inductors and standard inductors, power transformers, Common Mode Chokes, Ceramic Chip Inductors and Wire Wound Chip Inductors. CWS can supply all of your...