Power Electronics

Data Points

IC for Multimedia Section Supply in Feature Phones

Atmel Corp., Rousset, France, recently released the AT73C204 Power Management standard product, the first IC specifically designed for multimedia section supply in new-generation feature phones. Manufactured on Atmel's mainstream CMOS process, the AT73C204 is designed to power CMOS or CCD camera modules; MP3 or polyphonic ICs; multimedia coprocessor; external memory module; wireless data connection; and a USB interface.

The AT73C204 features the complete set of power supplies required to supply a high-end multimedia application. Seven linear regulators provide output voltages from 1.8 V to 2.8 V, with a range of output currents between 10 mA to 130 mA. A switching converter with integrated FET providing 300 mA at 1.8 V or 2.5 V is designed to supply the coprocessor core, which is used as a multimedia engine in most feature phones.

The AT73C204 comes in a 5-mm × 5-mm, 49-ball ultrathin BGA to satisfy portable device manufacturers' minimum space requirements. It's also available in a 7-mm × 7-mm, 49-pin QFN package for a reduced number of PCB layers.

For more information, visit www.atmel.com

Analog Devices Offers Two New Families of ICs

Analog Devices Inc.'s (ADI, Wilmington, Mass.) new ADM108x Simple Sequencer and ADM106x Super Sequencer devices provide supply-fault detection and sequencing logic, eliminating the need for the fault-detection ICs normally required to protect the printed circuit board against damage, miscommunication and latch-up.

The ADM1085, ADM1086, ADM1087 and ADM1088 Simple Sequencer ICs are easy-to-use, low-cost single-channel cascadable ICs that offer advanced voltage-control capabilities and can be adjusted to monitor voltages ranging from 0.6 V up to 22 V. During the power-up phase in systems with multiple power supplies, these sequencer ICs provide a time delay between the enabling of individual voltage regulators. This allows the user to set a power-up sequence in multi-supply systems. When the output voltage of a regulator reaches a preset threshold, a time delay is initiated, after which an enable signal allows the next regulator to power up. The Simple Sequencer devices are specified over the extended -40°C to +125°C temperature range, with a low-current consumption of 15 µA.

The ADM1062, ADM1063, ADM1064, ADM1065, ADM1066 and ADM1067 Super Sequencer ICs are user-configurable devices offering a single-chip solution for simultaneous monitoring and sequencing of up to 10 power supplies; five inputs can be configured as general-purpose logic inputs. They can detect voltages from 0.6 V to 14.4 V, while offering a total system-management solution, including power-supply margining.

For more information, visit www.analog.com/sequencing.

NanoSignal to Purchase AirGen Products

MGE UPS Systems Inc., Costa Mesa, Calif., announced that NanoSignal Corp. will purchase AirGen products through MGE's e-commerce partner, FuelCellStore.com. The AirGen fuel-cell generator will provide continuous backup power for NanoSignal's new SLICES image processing workstations used with magnetic resonance imaging (MRI) systems. The 1-kW AirGen models will be beta-tested at an initial MRI site operated by Desert Radiology in Las Vegas. Upon successful completion of testing, NanoSignal will include an AirGen system with each new SLICES workstation. Additionally, MGE will provide service for all AirGen units.

For more information, visit www.mgeups.com.

New UPS Platform

The Liebert NX from Emerson Network Power, Columbus, Ohio, is a mid-sized UPS platform that delivers complete centralized power protection for mission-critical systems in server rooms, mid-sized data centers and industrial plants. The 120/208-V 3-phase version of the platform is initially available in 10-kVA to 30-kVA sizes in four modules.

The Liebert NX features an online, IGBT-based double-conversion topology to protect critical equipment from the full range of power disturbances. Exceptional overload protection allows the system to handle 125% of rated load for 10 min, 150% for 1 min and 1000% for 10 ms.

Outage protection is provided by a flexible and intelligent battery system that includes a battery management algorithm to help ensure batteries are available when needed.

For more information, visit www.liebert.com or call 800-877-9222.

World Generator Set Market May Slow in 2004

Sales of generators have experienced dramatic swings during the past five years. The sector showed somewhat of a recovery in the second half of 2003, with sales recently beginning to show signs of life.

Technology research firm ABI predicts 2004 will mark a return to growth for the generator industry. According to ABI, sales are expected to grow from $5.3 billion in 2003 to $6.9 billion in 2011.

Sales got an immediate spark after the 2003 blackouts in the Northeast United States and parts of Canada. However, profit margins have been squeezed to negative due to intense competition. Another issue is the increasing standards in emissions. For example, Tier 2, 3 and 4 in the United States have forced generator companies to reduce emissions further, and heightened competition makes these extra development costs difficult to pass along to customers.

Emerging power-generation technologies, such as fuel cells and microturbines, also present a serious threat to the generator sector. Although fuel cells are still not mass manufactured and face technological issues, they have been benefiting from an enormous amount of government and private investment.

ABI's new study on the generator markets finds that although diesel generators dominate the market today, dual-fuel and natural gas engines will increase their market share. While the diesel-engine OEMs develop advanced technologies to reduce emissions, meeting upcoming Tier 3 and Tier 4 emissions will be a challenge.

For more information on this study, visit www.abiresearch.com.

DC-DC Converter

Dallas-based Tyco Electronics Power Systems recently introduced the JHW350 Series of high-efficiency half-brick dc-dc converters designed to support high-power wireless amplifier applications.

The JHW350 converters operate over an input voltage range of 36 Vdc to 75 Vdc, providing a single precisely regulated 28-V output of up to 350 W. Synchronous rectification technology enables the converter to achieve ultrahigh efficiency, reaching 94% at 28 V with full load.

The five-sided encapsulated package and innovative packaging supports excellent performance in many demanding thermal environments, allowing the module to operate over a wide-temperature range of -40°F to 185°F (-40°C to 85°C). Threaded through-holes allow easy mounting or the addition of a heatsink for high-temperature applications.

In addition, the JHW350 converter offers output-voltage adjustment (±10%), low-output ripple and noise, overtemperature protection, output overcurrent and overvoltage protection, as well as negative remote on/off logic.

For further information, visit www.power.tycoelectronics.com or call 800-526-7819.

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