In broadband bias applications, most inductors do not cover enough impedance bandwidth. Bandwidth can be increased by putting three or four inductors in series, but DC losses and filter complexity increase. Instead, a broadband bias choke provides wide bandwidth in a single inductor package.
RF inductor selection involves a number of key parameters including, mounting (surface mount or through-hole), inductance value, current rating, DC resistance (DCR), self-resonant frequency (SRF), Q factor, and temperature rating. While small size is typically desired, the laws of physics limit how small an inductor can be for a given application. Inductance value and current rating are the chief determinants of size. Once they have been calculated, other parameters can be optimized.
Modelithics Inc. and Coilcraft Inc. have teamed to develop two new Microwave Global Models™ for the Coilcraft BCL and BCR RF and microwave inductor families. Modelithics Microwave Global Models are high-accuracy equivalent circuit models that cover an entire component series within a single model.
Coilcraft's new SLR Family of high current, shielded power inductors is offered with current ratings up to 100 amps and inductance values from 85 to 370 nH, making it suitable for high frequency applications such as multi-phase VRM/VRD/EVRD regulators, Intel™ IMVP compatible systems, and GPUs/video graphic cards. The inductors also feature a tight DCR tolerance (±5.4% to ±10%) for lossless, inductor DCR-based current sensing.
Coilcraft will be highlighting their newly expanded line of BCL/BCR Series conical inductors at IMS 2015 next week in Phoenix, Arizona. The products are offered in two configurations. The BCR Series has a full-length cap to protect the coil and provide a large surface for pick and place. The BCL Series features “flying leads” to allow precise positioning and adjustment of the mounting angle.
Coilcraft’s new RFC family of leaded power inductors offer a low-cost, high-efficiency option for power supply applications. They are offered in three performance levels: the RFC0807 Series, the RFC0810 Series and the RFC1010 Series.
Coilcraft's new AGP4233 series shielded power inductors offer a unique combination of high current handling and high inductance, making them ideal for high-current power supply and filtering applications such as those used in electric vehicle start-stop systems.
Coilcraft’s XAL15xx family of rugged, magnetically-shielded power inductors are offered in two versions - one providing saturation current ratings up to 111 Amps and the other offering inductance values as high as 33 µH - delivering the highest levels of performance in the smallest possible space.