Power Electronics

Spotlight on Magnetics

Dual Data Bus Transformer

Designed to move data at rapid speeds in rugged environments, the low-profile 4256-1003 Series dual data bus interface transformers feature a surface-mount 3.94-mm (0.155-in.)-tall package for high-density electronic equipment. They feature a minimum input impedance of 4000 Ω or 7200 Ω over the full temperature range of -55°C to 130°C. They also support data transmission requirements in a range of mission-critical industrial and military applications.
Datatronics Romoland Inc.
Romoland, Calif.

CIRCLE 310

20-A Current Sense Transformers

The CT323 surface-mount current sense transformers are rated at 20 A in a sub 5-mm2 package, surpassing the 10-A rating typically available across the industry in this type of device. With a low-seated profile of 4.1 mm (0.162 in.) and an operating temperature range of -55°C to 155°C, the CT323 supports numerous communications and networking applications.
Datatronic Distribution Inc.
Romoland, Calif.

CIRCLE 311

Planar Magnetics

This line of high-efficiency surface-mount planar transformers and inductors includes off-the-shelf transformers capable of operation at 100 kHz to 3000 kHz. These devices offer up to 100-W ratings, 99% efficiency and a 7-mm profile.
Payton Group International, Boca Raton, Fla.
CIRCLE 312

Integrated Connector Modules

The ICM family of 10/100/1000 Base-TX RJ-45 single and multiport modular jacks with integrated magnetics may be ordered with circuit options for 10/100 Base-T, T1/E1 and common-mode choke only, and are also PoE compatible. Engineered with diverse internal magnetic filter designs to optimize performance of popular chipsets, these connectors meet IEEE802.3i/u/af and ANSI X3.263 standards.
Bel Fuse Inc., Jersey City, N.J.
CIRCLE 313

Common-Mode Chokes

These common-mode chokes offer superior properties at low and medium frequencies, and are optimized for performance in the high-frequency range. New cores with low- and high-permeability material account for dc unbalance.
VAC Magnetics Corp.
Elizabethtown, Ky.

CIRCLE 314

Power Inductors

The HM69 Series of low-profile SMT inductors offer current-handling capability up to 70 A and are for use in wireless applications, PDAs, PCMCIA cards, disk drives and general-use applications. The smallest of the family measures 6 mm × 5 mm × 3 mm. Offering a Class F insulation system, they operate at temperatures from -40°C to 125°C and offer dc resistance ratings ranging from 0.17 mΩ to 0.56 mΩ.
BI Technologies
Fullerton, Calif.

CIRCLE 315

Chip Inductors

The NR Series is for use in dc-dc converter choke-coil applications to meet the convergent needs of new-generation cell phones and other high power-consumption portables. The devices provide up to 30% higher rated current than conventional inductors of equal size. The three part numbers in the NR series provide a uniform 4-mm × 4-mm footprint, and are available in 1-mm, 1.2-mm or 1.8-mm device heights to remain within the vertical limits of key ICs in ultra-portable devices.
Taiyo Yuden (USA) Inc.
Schaumburg, Ill.

CIRCLE 316

Gapped Ferrite Toroids

For use in power inductors, these gapped ferrite toroids are available in the high flux, frequency stable material, 3C20. This material has very low losses, outperforming iron powder and all metal alloy powders. The brochure gives elaborate AL versus dc bias curves and loss density curves, also in comparison with MPP material. An example shows how to use these graphs in product calculations.
Ferroxcube USA
El Paso, Texas

CIRCLE 317

Power Cube Inductors

The PG0200.XXX power cube inductors are mainly for desktop PCs with T-socket processors. Applications include servers, multiphase voltage regulator modules, dc-dc converters and other point-of-load applications. With a high power density of 426 micro joules per cubic centimeter in a 16-mm × 3.2-mm × 9.2-mm maximum profile, they use a shielded E-core package.
Pulse, San Diego
CIRCLE 318

SMT Power Inductors

PM7232S, PM12639S and PM12645S high-current power inductors include eight new families with footprints from 7 mm to 13 mm. Designed with a flat wire to create more space for high-current capabilities, they offer an inductance range of 0.10 µH to 10 µH. They handle current as high as 80 A and have dc resistance as low as 0.54 mΩ.
J.W. Miller, Gardena, Calif.
CIRCLE 319

Gate Drive Transformer

GT04 gate drive transformers are for frequencies from 20 kHz to 30 kHz, use a UL Class F insulation system and meet Medical Safety Isolation Requirements. There are 12 standard turns ratios in the series, with custom values available.
ICE Components
Manassas, Va.

CIRCLE 320

Harmonic Cancellation Transformers

The ZST Series zero sequence harmonic filter transformer cancels triplen harmonics from line-to-neutral connected single-phase loads. It reduces the flow of triplen harmonics on the neutral by creating a phase shift that cancels the triplen harmonics produced in each phase against those produced in each of the other phases.
Controlled Magnetics Inc.
Brighton, Mich.

CIRCLE 321

SMT Inductor Catalog

This Surface Mount Inductor Catalog contains more than 50 unique products with over 1,000 specific values to choose from, including the world's lowest profile shielded SMT power inductor, measuring less than 1 mm. Available styles include wire wound, injection molded, epoxy coated, ceramic, ferrite, multilayer and common mode.
Renco Electronics Inc.
Rockledge, Fla.

CIRCLE 322

Gate Drive Transformer

The GT03 SMT gate drive transformer meets medical safety requirements. Key features packed into the 6.8-mm-high package include options to meet medical creepage/clearance requirements, E-T values up to 150-V-usec, and frequencies from 50 kHz to 350 kHz.
ICE Components
Manassas, Va.

CIRCLE 323

Power Inductors

DZM low-voltage, high-current inductors are for switching power supplies and portable electronics. Free from thermal aging effects of standard iron powders, they offer increased energy storage, are lead-free and RoHS compliant. Their low profile and improved dc bias performance lets design engineers increase power handling and performance of products.
CoEv Magnetics
Menlo Park, Calif.

CIRCLE 324

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