Fixed 5:1 conversion ratio isolated DC/DC convertor is designed for powering multiple downstream nonisolated point-of-load convertors in intermediate bus architecture applications
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The EUS34-096 from C and D Technologies is a fixed 5:1 conversion ratio isolated DC/DC convertor. The module is designed for powering multiple downstream nonisolated point-of-load (POL) convertors in intermediate bus architecture (IBA) applications found in computer and telecommunications equipment.

By incorporating input-to-output isolation of up to 2250V DC, the EUS34-096 allows designers to achieve important cost and space savings by allowing them to use nonisolated POL convertors rather than larger, more expensive, isolated versions.

The new module, which has an industry standard eighth-brick footprint, specifies an input voltage range of 38 to 55V DC.

It is able to deliver a maximum of 300W at 48V DC input, and minimum 240W output at 38V DC input, both at +55C and 1m/s linear airflow.
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Typical efficiency of the fully RoHS compliant bus convertor is 96%.

The EUS34-096 features a positive or negative triggered primary side remote enable capability.

The specification also includes overcurrent and overtemperature protection, both with automatic restart.

The new module is suitable for parallel operation allowing it to satisfy the requirements of higher power applications.

Overall dimensions are 58.4 x 36.8 x 12.2mm and the operating temperature range is -40 to +85C.

The EUS34-096 meets the requirements of the UL94V0 flammability specification and has a demonstrated MTBF of 1.3Mh.

Astec and Artesyn power supplies and DC/DC convertors on show at Electronica 2006 will include a number of products that are being shown for the first time in Europe
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Emerson Network Power will be exhibiting the latest Astec and Artesyn power supplies and DC/DC convertors at Electronica 2006, including a number of products that are being shown for the first time in Europe. Electronica is the first major European exhibition that Emerson Network Power has attended since its recent acquisition of Artesyn Technologies.

Emerson Network Power is exhibiting on Stand 433 in Hall B2, where a wide range of Astec and Artesyn products will be on display.

Products being shown for the first time include the Astec DS series distributed power system, an Artesyn ATCA-compliant dual-input bus convertor, and the latest eighth- and quarter-brick intermediate bus convertors.

The highlight of the show will be the Astec iMP series of intelligent power supplies.

These latest-generation modular AC/DC power supplies can be configured to deliver up to 1500W, with the industry’s highest power density in their class, and feature extensive I2C monitoring and programming capabilities.

Live demonstrations of these products will be provided twice a day, starting at 1030 and 1430 local time, and last about an hour.

Vicor has added eight mid-power Maxi DC/DC convertors to the 375V DC input family
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With the addition of nine new mid-power models, the 300V-input Mini family now comprises 17 DC/DC convertors with output voltages from 2 to 48V and power levels from 100 to 250W

: a 200W model at 3.3V output, a 300W model at 5V output, and 400W models at 12, 15, 24, 28, 36, and 48V output. The modules - which incorporate Vicor’s patented low-noise zero-current and zero-voltage switching (ZCS/ZVS) - are appropriate for offline systems with auto-ranging or PFC front ends in industrial or process control, distributed power, medical, ATE, communications, defence and aerospace applications.

With these new models, the 375V input Maxi family now comprises 17 models with output voltages from 2 to 54V DC and power levels from 160 to 600W.

The convertors operate from 375V nominal input, with an input range of 250 to 425V.

Efficiencies range up to 89% for the higher output voltages.
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The 24V-input Mini family now comprises 16 models with output voltages from 3.3 to 48V DC and power levels from 100 to 200W

These models are available in five different environmental grades, with six different pin options and three baseplate options.

They can be configured in any combination in Vicor’s online custom module design system.

Designers who do not need the full-power capability of a 375V Maxi module now have the availability of a mid-power Maxi with all of the functionality and configurability of the high power models.

In addition, the low noise ZCS/ZVS greatly reduces the design effort and filtering costs required for power convertors to meet agency conducted emissions requirements.

The modules, which are available as RoHS compliant if required, are a compact 117 x 56 x 12.7mm in size, with a height above board of 10.9mm.

Vicor’s comprehensive line of power solutions includes modular, high-density AC/DC and DC/DC modules and accessory components, fully configurable AC/DC and DC/DC power supplies, and complete custom power systems.

A new generation of software-customisable switching power supplies from Astec Power features sophisticated digital management capabilities. This microprocessor-controlled design is billed as the industry’s first AC/DC power supply to offer a fully software customisable power solution with the low cost and immediate availability expected from a standard ‘off-the-shelf’ unit. Astec’s new iMP Series allows designers complete software control over every major aspect of PSU configuration.

Custom power solutions from 400 to 1500W can be tailored in software to the specific and individual needs of an application using standard units comprising single, dual, and triple output modules in power ratings from 400 to 750W.

These modules can be configured in a selection of three customisable MP cases accepting input voltages from 85 to 264V AC or 120 to 350V DC.

Cases can accommodate up to seven individual modules with a choice of outputs ranging from 2 to 60V DC.

‘In addition to having 50% higher power density than previous generation products, this new breed of switching power supplies uses integrated digital capabilities to provide smart communication and programmable control features that will enable designers to precisely fine tune power for their needs throughout the development process’, explained Astec Product Marketing Director Chris Jones.

‘The easy-to-use microprocessor interface allows designers to make adjustments to a host of parameters including: voltage, current, fan speed, sequencing, power factor correction, inrush and more’.

‘In spite of the advanced feature set, designers should find that this new digital generation of intelligent switching power supplies be price competitive with existing technology’, continued Jones.

Using the Windows software provided, designers can program all key features of iMP Series modules, including: output voltage; output enable/sequencing; module inhibit/enable polarity; DC OK and AC OK thresholds; output current limit setpoint and type; overtemperature and overvoltage threshold; current share configuration; and intelligent fan control.

Using the increasingly popular I2C communication protocol, these systems will also be able to monitor and capture configuration and in-service information as well as parametric data for each output.

Backed by a two-year warranty, iMP Series products meet worldwide safety and performance standards including listings from UL and CE as well as full medical compliance with EN60601.

Emerson Network Power has introduced a new range of high-power integrated DC/DC brick convertors from Astec Power. The Astec AIF and AIH Series are integrated convertor modules offering a particularly high power density up to 108W/in3. The half-brick AIH version can deliver up to 250W, and the AIF version up to 600W of output power from a wide input range of 250 to 420V DC.

The new range provides an extensive choice of single output versions offering DC voltages of 1.8, 3.3, 5, 12, 15, 24 and 48V (AIF only).

With a high level of built-in intelligence, improved power efficiency and a wide operating temperature range, these advanced modules provide an ideal power solution for communications, industrial, non-patient-connected medical equipment and ground base military applications.

The devices are especially well suited for compact enclosed systems and protected outdoor environments.

The modules also support multi-module parallel operation, providing a simple route to larger power system requirements.

The next generation design of the Astec AIF/AIH Series provides a whole new set of embedded functions that deliver major benefits to end users.

These new convertors provide an extensive set of ‘embedded’ functions that include monitoring, protection and adjustment capabilities as well as a communication bus, coupled with onboard EEPROM, which allows the storage of valuable user-defined information that eliminates the need for designers to create these features externally on the circuit board.

This flexibility frees up board space and allows for future increases in the density of the design.

Operating at a wide base-plate temperature range from 40 to +100C without derating, the new models reach up to 90% efficiency at 5V output.

The key embedded functions include: current sharing, enable (positive and negative option), output voltage adjust; clock-in (for synchronisation in parallel application), temperature monitoring and output current monitoring.

With increasing needs for storing and communicating significant end-user information, the devices also include the increasingly popular I2C Interface with an internal EEPROM for data storage.

To minimise external connections and optimise control, the Astec AIF/AIH Series also incorporates an internal microprocessor that can control all of the monitoring and adjustment features through the I2C interface bus.

Beyond these monitoring and control functions, all models offer a number of safeguards such as overtemperature, overvoltage and overcurrent protections.

Designed with state-of-the-art components, the Astec AIF family employs surface-mount designs that simplify manufacturing while enhancing quality and reliability.

XP Power has announced the MTC, a series of 4 to 35W DC/DC convertors designed as a standard product family exclusively for defence and avionics applications. No compromise has been made in component selection or construction to make it adaptable for communications, industrial or transport applications, as is often the case with products from other vendors. The MTC is a noncustom convertor based on commercial off-the-shelf (COTS) components and is available in 5, 15 and 35W ratings.

It offers substantial cost savings over traditional military power supplies and is available from stock to reduce system time to market.

The convertor meets the MIL-STD 810F specification for temperature, shock, vibration, bump, altitude, salt fog and other key parameters associated with military applications.

Suitable for systems with a nominal 28V input, it has a wide input range of 15.5V to 40V and can operate through transients of 10V for 10 seconds and up to 50V for one second, in accordance with MIL-STD 704B-F.

Input immunity, with the complementary filter module, designated MTF, meets MIL-STD 1275A/B and MIL-STD 704A.

EMI performance meets MIL-STD 461E with the filter installed.

Single output versions are available with output voltages of 3.3, 5, 12, 15 or 28V.

The MTC is fully featured to minimise external circuitry.

It includes an inhibit line, the ability to synchronise with an external frequency source, output voltage programmable by resistor or external voltage, thermal warning ‘battle mode’ signal on the 35W units, overvoltage protection and overcurrent protection.

This comprehensive feature set, which minimises the total power system cost, is not found in other low power DC/DC convertors.

The power supply is housed in an extruded aluminium case with heat dissipating fins to remove heat by convection plus a base plate for effective heat conduction.

The board-mount convertor has mounting holes to enable it to be mechanically secured in order to improve thermal conduction and improve shock and vibration performance The MTC uses forward convertor topology with synchronous rectification at the output stage to maximise efficiency.

The nominal switching frequency of 450kHz provides the optimum balance of efficiency, power density and EMC performance.

The power conversion and control functions are on separate printed circuit boards to conserve board space and maximise power density.

The ambient operating temperature range is -40 to +100C at the baseplate, with -55C screened units available to order.

The latest CC-E compact DC/DC convertors designed and manufactured by TDK are now available from power supply specialist, Lambda under the new collaborative TDK-Lambda product brand. With power ratings from 1.5 to 25W in versions with 5, 12, 24 or 48V inputs, the DC/DC convertors feature a small footprint and low profile, making them an ideal choice for use in modern telecommunications, datacommunications, instrumentation and industrial applications, where space is invariably at a premium. The DC/DC convertors, which are fully RoHS compliant, use nonpotted open-frame construction.

This not only reduces their weight, but also allows the range to include versions which are suitable for surface mount applications, in addition to standard models for use with through-hole boards.

The CC-E DC/DC convertors are offered in no fewer than 69 versions, and are available with single outputs from 3.3 to 30V, or with dual outputs of +/-12 or +/-15V.

No preloading is required, and the outputs are overcurrent protected.

The output voltage on all models can easily be trimmed by the user to suit the exact requirements of the application.

High efficiency - up to 90%, depending on the model - keeps the heat generated by the convertors to a minimum, and allows them to deliver their full rated output over the temperature range -40 to +50C.

With suitable derating, or when cooled by an airflow of at least 1m/s, the operating temperature range can be extended to +85C.

All the compact DC/DC convertors in the CC-E range available through Lambda have isolation rated at 500V AC between input and output, input and case, and output and case.

Waldom Electronics has signed an agreement with Triad Magnetics, a manufacturer of power conversion products. As part of the agreement, Waldom Electronics has agreed to inventory Triad’s complete line of products, including power and audio transformers, power supplies, inductors, switch-mode/high-frequency magnetics and wall plug-in adapters. By stocking Triad’s complete line of products, Waldom becomes an easy and reliable source for distributors.

‘Waldom maintains the resources to inventory the complete product line and provide same day shipments, which other redistributors are typically not capable of doing’, said Bill Dull, President, Triad Magnetics.

‘Waldom plays an important role in servicing the distributors by providing crucial safety stock’.

Waldom Electronics caters solely to the unique needs of distributors, providing them with access to premier brands (such as Amp/Tyco, Cherry Electrical, Cinch, Crydom and Molex), off the shelf delivery, low order minimum, broken pack quantities and same day shipments.

Waldom Electronics has over 280,000 part numbers in stock.

Specialist defence and aerospace industry supplier Roband Electronics has developed a new miniature POL (point-of-load) regulator for main power units and integrated circuits in a wide variety of military and avionics applications. With an output of 0.8 to 3.3V at 5A and a 5V input, Roband’s POL regulators have a military temperature range of -55 to +125C. The product is just 20 x 25 x 8mm and weighs only 12g, with a variety of different pinout configurations.

Designed to give optimum vibration support, it has a machined aluminium enclosure and is encapsulated for maximum environmental protection.

C and D Technologies has introduced an isolated DC/DC convertor that provides a cost and space saving solution for intermediate bus architecture applications in computer and telecommunications equipment. The QUS40-096 has an unregulated output, and a fixed conversion ratio of 5:1 that is maintained between the input and output voltages. The module is housed in a compact, industry standard, quarter-brick footprint package.

Operating from a typical input voltage of 48V DC, the QUS40-096 has an output voltage set-point of 9.6V DC.

It is able to deliver a maximum output power of 300W at 38V DC input, +55C and 1m/s linear airflow, and has a typical efficiency of 96.6%.

By incorporating isolation (up to 2250V DC), the new bus convertor allows designers to achieve overall cost and real estate savings by allowing them to use nonisolated point-of-load (POL) devices rather than larger, more expensive isolated versions.

The QUS40-096 features a primary side remote enable capability (positive or negative triggered), plus overcurrent and overtemperature protection, both with automatic restart.

The versatile module is also suitable for parallel operation allowing it to satisfy the requirements of higher power applications.