1. 98%-efficient bus converters

The IBC054 Series of VI Brick bus converters are available as drop-in upgrades for industry-standard 5:1 and 4:1 converters. These eighth and quarter bricks are 98% efficient from a 36 to 60-V input voltage range at power levels from 300 up to 750 W, with 2,250-Vdc isolation from input to output. The converters offer a transient surge capability of 75 Vin for 100 msec for telecom, power-over-Ethernet, and other applications.

An online cross-reference selection tool lets users upgrade to high-efficiency converters. A simple interface, searchable by manufacturer or part number, lets users search bricks, quantify relative power savings, and select more efficient products.

Vicor Corp., 25 Frontage Rd., Andover, MA 01810, (800) 735-6200,

2. Supplies feature 10-year capacitor life

The 50-W ZWS50BAF and 75-W ZWS75BAF join the ZWS line of compact ac-dc power supplies. The supplies combine high efficiency — at low load conditions — with a wide operating temperature range, small size, and up to 10-year electrolytic capacitor life.

The supplies accept a 85 to 264-Vac ac input range, have a low profile of 1.0 to 1.3 in., and measure 2.0 × 5.2 × 5.9-in. long.

The devices feature a universal ac input with PFC; operate from a 120 to 370-Vdc input; are designed to withstand 3-kVac, input-to-output; and are available with output voltages of 3.3, 5, 12, 15, and 24 V or 48 Vdc, all of which have a ±10% adjustment range for nonstandard system requirements.

The operating temperature range is -10 to 70°C, allowing 100% load operation in a 50°C environment.

TDK-Lambda Americas Inc., 3055 Del Sol Blvd., San Diego, CA 92154, (800) 526-2324,

3. Power-circuit busbars for EVs

RO-LINX PowerCircuit busbars handle power-distribution needs in electric vehicle (EV) drives, hybrid electric-vehicle (HEV) drives, and related charging systems, as well as solar-power inverters, uninterruptable power supplies, and industrial motor drives.

The busbars offer the features of power PCBs and laminated busbars. They can be made in three dimensions to reduce weight and footprint and to conform to specific engineering designs. The busbars handle applications at current levels from 100 to 500 A and can be combined with industrial mounting of functional components such as capacitors, sensors, and IGBTs.

The devices feature a closed-mold design, using materials engineered for high-performance reliability in applications subjected to high vibration and temperature cycling. 3D designs are well suited for medium-to high-volume assembly and work with most soldering processes.

Rogers Corp., Power Distribution Systems Div., 2225 W. Chandler Blvd., Chandler, AZ 85224, (480) 917-6000,

4. Super-efficient dc-dc quarter brick

The NQB Series isolated dc-dc quarter brick 720-W intermediate bus converter initially supports an input range of 36-60 V with an output of 12 V, with an efficiency greater than 96%. Additional features include options for DOSA 1st generation or 2nd generation footprint compatibility, remote on/off, and load share capability. Typical applications are in telecom systems and data centers, supplying an industry leading power density of 445 W/in3 across the full 36-60 V input range. The devices use a special Solus Topology that integrates a conventional buck converter into a Sepic converter to form a totally new Sepic-fed buck converter: a patented single stage topology with one magnetic element, one control switch and two commutation switches that are optimally controlled by pulse-width modulation. With lower voltage and current stresses in the topology, coupled with an inherent gate charge extraction process, Solus can reduce switching turn-on losses by 75% and switching turn-off losses by 99% on the control FET when compared with a conventional buck converter. The Solus Topology further increases total efficiency by distributing the energy delivery into multiple paths, reducing circuit conduction losses by nearly 50%.

CUI Inc., 20050 SW 112th Ave., Tualatin, OR 97062, (800) 275.4899,

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