Power Electronics

Data Points

JMC Introduces Counter-Rotating, Dual-Blade Fans

JMC Products, Austin, Texas, recently introduced a new counter-rotating, dual-blade fan design. This dual-impeller, dual-motor fan is engineered with redundancy to protect against fan failure and to produce effective airflow performance against high system pressures. As a result, the fan offers a 90% improvement in CFM and PQ curve in comparison to a similar size single blade fan.

JMC's counter rotating fans are a new model size for the thermal cooling industry, measuring just 40 mm × 50 mm × 32 mm and 40 mm × 50 mm × 38mm. The 40 mm × 50 mm × 32 mm fan delivers up to 18 CFM at 0.47 in. of H20, and the 40 mm × 50 mm × 38mm fan delivers up to 23 CFM at 0.60 in. of H20.

For more information on JMC, visit www.jmcproducts.com.

Breakthrough Made in Schottky Diode Performance

Royal Philips Electronics, Eindhoven, the Netherlands, recently achieved a breakthrough in Schottky diode semiconductor technology that reduces power dissipation to such low levels that these diodes can be housed in surface-mount packages less than half the size of existing devices.

The new PMEG series Schottky diodes are designed to further enable miniaturization of equipment such as mobile phones and digital cameras, while improving the overall electrical efficiency. The inherent low forward volt drop and high-speed switching capabilities make them ideal for applications such as high-efficiency dc-dc converters.

By reducing their forward resistance to less than half that of equivalent diodes on the market, the PMEG series reach power dissipation levels approximately half that of industry-standard types. They also achieve continuous forward current ratings as much as 10 times higher (up to 2A in a SOD323 package, giving flexibility in design as well as board space reduction to customers.

For more information, visit www.semiconductors.philips.com.

Alternative to Incandescent Bulbs

This new family of LED (light emitting diode) light engines from Lamina Ceramics, Westampton, N.J., use super-bright LEDs and proprietary low temperature co-fired ceramic on metal (LTCC-M) technology. They are designed for use in a variety of commercial and industrial applications, including road signage, automobiles, and industrial lighting.

The initial two LED light engines feature either a 7-element LED array or 134-element LED array. Lamina integrates the LED technology along with optional driver circuitry and optics into its LTCC-M package to create complete LED light engines, which are highly engineered LED arrays designed to provide light of a specified intensity, wavelength, and viewing angle.

Because Lamina's LED light engines use LTCC-M, they have an operational temperature limit of 250°C. The LTCC-M technology also allows LED dies to be attached directly to the package in a densely packed array configuration so that a high light density is achieved. The 7-cavity LED light engines have luminous intensities up to 840 lm, with 21W of power consumption, while the 134-cavity LED light engines have luminous intensities up to 5360 lm, with 134W of power consumption.

For more information, visit www.laminaceramics.com.

STMicroelectronics Announces 90 nm NOR Flash Technology

STMicroelectronics (ST), Lexington, Mass, has released the world's smallest NOR Flash memory cell for low-voltage and high-performance applications. Featuring built-in 90 nm technology, ST's NOR Flash memory cells occupy a silicon area of only 0.08 µm2, a 50% size reduction from the current 130 nm generation.

ST is also the first NOR Flash supplier to report successful fabrication of NOR Flash memories in 90 nm technology. The new technology has been proven on a multi-megabit demonstrator chip that showed full functionality of entire memory array sectors. In addition, 128-Mbit prototype Flash devices were included on the same development wafers and are currently under evaluation.

For more information, visit the Web at www.st.com.

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