DURHAM, USA: Cree Inc. announced demonstrations of its latest broadband GaN HEMT transistors (the CGH40120F and CGH40180PP) at the 2009 IEEE/MTT-S International Microwave Symposium being held this week in Boston.
The demonstration amplifiers feature high efficiency and high power under continuous-wave (CW) operation, with typical power-added efficiencies (PAE) of 70 percent at saturated powers of 120W for the CGH40120F and 180W for the CGH40180PP in class A/B demonstration amplifiers.
"A number of very-high-efficiency amplifier architectures, routinely used at lower frequencies for audio and UHF applications, are being realized at much higher RF and microwave frequencies using GaN transistors," said Jim Milligan, Cree director for RF and microwave products.
"Published research indicates greater than 80 percent PAE using Class D, E, F and J amplifier architectures, with Cree GaN HEMT transistors, at frequencies over 2 GHz. More-typical Class A/B operation can also offer exceptional efficiency, validated by the demonstrations we are giving this week. Cree GaN transistors offer system designers a wide range of choices, supporting diverse application requirements."
The CGH40120F and CGH40180F are the newest members of Cree's general-purpose transistor product family. Samples and fixtures are available through Digi-Key. Large-signal models for Agilent's ADS or AWR's MWO simulators are available directly from Cree.
Tuesday, June 9, 2009
Monday, June 8, 2009
HAVELLS forays into LED lighting segment
NEW DELHI, INDIA: Havells India Ltd, a US$1 billion plus company and one of the largest and fastest growing electrical and lighting companies in the world, has introduced “Endura Lite”, a revolutionary product in the light-emitting-diodes (LED) Market. LED is the future lighting source in India and are at the forefront of technological innovations.
“Endura Lite” by Havells, will consume 50 percent less energy than traditional sources. It is four times more energy efficient than regular incandescent lamps, because a larger part of the energy is converted into light than is lost as heat.
There is no use of glass or filament in these kind lightings as compared to in normal lightings, hence “Endura Lite” has a phenomenally long lifespan with average life of 50,000 hours. This LED light not only reduces the electricity bills but also improve the quality of working conditions at commercial establishments and offices.
These lamps are easy to install and do not emit UV radiation. It is smaller in size and lighter in weight. Endura Lite is suitable to fit in standard MR 16 fixtures and has been tested for its high shock resistance and durability.
These new age lighting innovations are designed to give higher efficiency and consume low power and has environment friendly luminous source, which make it the best in LED lighting category.
Endura Lite is favorable to be used in the following spaces like, Jewellery Mart, Designer Showrooms, Recreational Areas, High-end specialty shops, Auditoriums, Theaters, Art Galleries and Museums, Endura Lite transforms the look of an ordinary space into an extraordinary one. The exclusive range is available in 3x1w and 1x3w with two colors i.e. Day light white and warm white.
“Endura Lite” by Havells, will consume 50 percent less energy than traditional sources. It is four times more energy efficient than regular incandescent lamps, because a larger part of the energy is converted into light than is lost as heat. There is no use of glass or filament in these kind lightings as compared to in normal lightings, hence “Endura Lite” has a phenomenally long lifespan with average life of 50,000 hours. This LED light not only reduces the electricity bills but also improve the quality of working conditions at commercial establishments and offices.
These lamps are easy to install and do not emit UV radiation. It is smaller in size and lighter in weight. Endura Lite is suitable to fit in standard MR 16 fixtures and has been tested for its high shock resistance and durability.
These new age lighting innovations are designed to give higher efficiency and consume low power and has environment friendly luminous source, which make it the best in LED lighting category.
Endura Lite is favorable to be used in the following spaces like, Jewellery Mart, Designer Showrooms, Recreational Areas, High-end specialty shops, Auditoriums, Theaters, Art Galleries and Museums, Endura Lite transforms the look of an ordinary space into an extraordinary one. The exclusive range is available in 3x1w and 1x3w with two colors i.e. Day light white and warm white.
Friday, June 5, 2009
New power AC switches feature built-in surge protection
SINGAPORE: Two new families of AC power switches from STMicroelectronics simplify the design of domestic appliances and industrial equipment by integrating surge protection that meets the international standard IEC 61000-4-5, which is usually implemented using external components.
The 10A ACST10 and 12A ACST12 families complete ST’s range for applications from 2A to 12A. They can be used for protecting washing-machine motors, compressors for refrigerators or air-conditioning units, or in industrial drives.
The devices replace conventional electromechanical relays or TRIAC-based power switches, which require additional external components to prevent damage caused by voltage surges in the AC supply or by energy stored in the load.
Several other external components can also be eliminated since the switch input can be connected directly to the appliance’s electronic control unit, whereas a relay or TRIAC typically requires a separate input driver. In addition, designers must usually add components to prevent unpredictable turn-on or turn-off of the motor, but these, also, are not required when using the ACST10 or ACST12.
Package options include the industry-standard through-hole TO-220AB and plastic insulated TO-220FPAB packages for the ACST10 family, and TO-220AB or surface-mount D2PAK for the ACST12 family. The devices are in production now at prices from $0.51 for ACST10 devices and $0.61 for the ACST12 family, for orders over 10,000 units.
The 10A ACST10 and 12A ACST12 families complete ST’s range for applications from 2A to 12A. They can be used for protecting washing-machine motors, compressors for refrigerators or air-conditioning units, or in industrial drives. The devices replace conventional electromechanical relays or TRIAC-based power switches, which require additional external components to prevent damage caused by voltage surges in the AC supply or by energy stored in the load.
Several other external components can also be eliminated since the switch input can be connected directly to the appliance’s electronic control unit, whereas a relay or TRIAC typically requires a separate input driver. In addition, designers must usually add components to prevent unpredictable turn-on or turn-off of the motor, but these, also, are not required when using the ACST10 or ACST12.
Package options include the industry-standard through-hole TO-220AB and plastic insulated TO-220FPAB packages for the ACST10 family, and TO-220AB or surface-mount D2PAK for the ACST12 family. The devices are in production now at prices from $0.51 for ACST10 devices and $0.61 for the ACST12 family, for orders over 10,000 units.
Thursday, June 4, 2009
OSRAM raises bar on LED performance for projection applications
SUNNYVALE, USA: OSRAM Opto Semiconductors has expanded its LED portfolio for the projection market with two new LEDs, OSTAR Compact and OSTAR Power Projection. OSTAR Compact is designed for small, efficient systems in cell phones, PDAs and MP4 players.
OSTAR Power Projection is targeted at high-performance projection applications such as home cinema systems with displays of 70 inches and more. OSRAM’s LED portfolio now provides full coverage of the projection system range from 1W all the way up to 300W.
OSTAR Compact expands the OSRAM family of LEDs for small applications at the lower end of the performance range. It measures only 3.9 mm x 3.6 mm and is available in red, blue, green and white. These new small LEDs are cost-effective components, particularly for pico projectors for small mobile devices.
Manufacturers wanting very compact units can use a double-chip version that contains a red chip and a blue chip in one LED. This saves space compared with the usual configuration of three individual LEDs (red, blue, green). As an SMT component, the LED can be easily integrated into standard manufacturing processes. Integrated ESD protection diodes guard against electrostatic effects.
The OSTAR Power Projection LED brings a new dimension to projection applications delivering high performance and low thermal resistance. It can be operated at a maximum of 36A and produces light of impressive brightness. Typical values are 2700 lm in red, 3500 lm in green and an optical output of 13 W in blue.
While the dimensions of 45 mm x 25 mm seem large for a standard LED, the thermal resistance is only 0.77 K/W. This LED is suitable for all types of cooling, including water cooling. A uniform cooling system can therefore be used for all colors because the junction temperature is the same for all colors (125°C).
“LEDs will one day become the standard for all projection applications, including high-end applications,” said Wolfgang Schnabel, Marketing Manager LED Projection at OSRAM Opto Semiconductors. “We are well positioned for this swift migration of LEDs into projection applications and offer several OSTAR LED versions, namely Compact (up to 25 W), SMT (10 to 40 W), Projection (25 to 70 W) and Power Projection (90 to 150 W), to cover numerous applications -– from cost-effective pico projectors to home cinema equipment as well as mobile projection systems for mid-range applications.”
OSTAR Power Projection is targeted at high-performance projection applications such as home cinema systems with displays of 70 inches and more. OSRAM’s LED portfolio now provides full coverage of the projection system range from 1W all the way up to 300W.OSTAR Compact expands the OSRAM family of LEDs for small applications at the lower end of the performance range. It measures only 3.9 mm x 3.6 mm and is available in red, blue, green and white. These new small LEDs are cost-effective components, particularly for pico projectors for small mobile devices.
Manufacturers wanting very compact units can use a double-chip version that contains a red chip and a blue chip in one LED. This saves space compared with the usual configuration of three individual LEDs (red, blue, green). As an SMT component, the LED can be easily integrated into standard manufacturing processes. Integrated ESD protection diodes guard against electrostatic effects.
The OSTAR Power Projection LED brings a new dimension to projection applications delivering high performance and low thermal resistance. It can be operated at a maximum of 36A and produces light of impressive brightness. Typical values are 2700 lm in red, 3500 lm in green and an optical output of 13 W in blue.
While the dimensions of 45 mm x 25 mm seem large for a standard LED, the thermal resistance is only 0.77 K/W. This LED is suitable for all types of cooling, including water cooling. A uniform cooling system can therefore be used for all colors because the junction temperature is the same for all colors (125°C).
“LEDs will one day become the standard for all projection applications, including high-end applications,” said Wolfgang Schnabel, Marketing Manager LED Projection at OSRAM Opto Semiconductors. “We are well positioned for this swift migration of LEDs into projection applications and offer several OSTAR LED versions, namely Compact (up to 25 W), SMT (10 to 40 W), Projection (25 to 70 W) and Power Projection (90 to 150 W), to cover numerous applications -– from cost-effective pico projectors to home cinema equipment as well as mobile projection systems for mid-range applications.”
ST advances ultra-low-power linear design with 1.5V op-amps
SINGAPORE: STMicroelectronics has unveiled three new families of precision op-amps targeting low-power and portable products, with power-saving features that include high-speed performance at low supply current, operation from a 1.5V supply, and device-shutdown capability.
Offering low power consumption, high bandwidth and good accuracy, the TSV6xx families serve applications such as portable medical equipment, instrumentation, signal-conditioning systems, sensor interfaces, and active filtering. With high EMI rejection allowing use in electrically noisy environments, high ESD tolerance, and operation over the extended temperature range from –40 to +125 degrees centigrade, the new op-amps can also be used in various types of industrial equipment.
The TSV61x, TSV62x and TSV63x families offer a variety of performance choices in single, dual or quad op-amp configurations. Active current as low as 11-microamps for the TSV61x, 29-microamps for the TSV62x family and 60-microamps for the TSV63x family contributes to system power savings, while the supply-voltage range of 1.5V to 5.5V simplifies low-power design and extends battery life in battery-powered products.
TSV62x and TSV63x offer 420kHz and 880kHz gain-bandwidth-product, respectively. Low input offset voltage (down to 500 micro-volts maximum) and input bias current (1pA) maintain accuracy with small input signals. The TSV62x and TSV63x families also offer shutdown and non-shutdown versions.
All devices have rail-to-rail inputs and outputs to maximize dynamic range, and are housed in tiny packages, including the SC70-5 and SOT23-8, with no shutdown pin, and the SC70-6, SOT23-6, MSO10 for the shutdown versions.
The TSV62x and TSV63x are in full production, priced from $0.22 (single), $0.30 (dual) and $0.47 (quad) for orders of 1000 units. The TSV61x will be released in Q3 2009.
Offering low power consumption, high bandwidth and good accuracy, the TSV6xx families serve applications such as portable medical equipment, instrumentation, signal-conditioning systems, sensor interfaces, and active filtering. With high EMI rejection allowing use in electrically noisy environments, high ESD tolerance, and operation over the extended temperature range from –40 to +125 degrees centigrade, the new op-amps can also be used in various types of industrial equipment. The TSV61x, TSV62x and TSV63x families offer a variety of performance choices in single, dual or quad op-amp configurations. Active current as low as 11-microamps for the TSV61x, 29-microamps for the TSV62x family and 60-microamps for the TSV63x family contributes to system power savings, while the supply-voltage range of 1.5V to 5.5V simplifies low-power design and extends battery life in battery-powered products.
TSV62x and TSV63x offer 420kHz and 880kHz gain-bandwidth-product, respectively. Low input offset voltage (down to 500 micro-volts maximum) and input bias current (1pA) maintain accuracy with small input signals. The TSV62x and TSV63x families also offer shutdown and non-shutdown versions.
All devices have rail-to-rail inputs and outputs to maximize dynamic range, and are housed in tiny packages, including the SC70-5 and SOT23-8, with no shutdown pin, and the SC70-6, SOT23-6, MSO10 for the shutdown versions.
The TSV62x and TSV63x are in full production, priced from $0.22 (single), $0.30 (dual) and $0.47 (quad) for orders of 1000 units. The TSV61x will be released in Q3 2009.
Wednesday, June 3, 2009
Microsemi intros next-gen LED chipset solution for LED backlit TV displays
IRVINE, USA: Microsemi Corp., a leading manufacturer of high performance analog/mixed signal integrated circuits and high reliability semiconductors, extended its comprehensive line of backlight-driving IC solutions with the production release of the company's LX24132 32-port LED backlight controller and LX23108L 8-port LED driver.
Microsemi's chipset provides a scalable, integrated solution for direct or edge-lit backlight applications in flat-panel LCD TV displays, and supports White LED or RGB LED implementations.
Its products are designed to provide outstanding performance and functionality in demanding LCD TV, notebook computers, automotive and other display platforms and applications. The chipset can easily be integrated with Microsemi's complementary light-sensor and color-management system solutions to deliver additional quality and functionality.
"Customers have been using Microsemi's proven CCFL solutions for many years in a variety of mainstream applications, and now they can take advantage of Microsemi second-generation LED driving technology for the most energy-efficient designs possible," said Tom Kapucija, director of marketing at Microsemi's Analog Mixed Signal Group. "Microsemi is committed to supporting its customers during their implementation of this new and efficient green LCD TV display technology."
Microsemi's chipset provides a scalable, integrated solution for direct or edge-lit backlight applications in flat-panel LCD TV displays, and supports White LED or RGB LED implementations.
Its products are designed to provide outstanding performance and functionality in demanding LCD TV, notebook computers, automotive and other display platforms and applications. The chipset can easily be integrated with Microsemi's complementary light-sensor and color-management system solutions to deliver additional quality and functionality.
"Customers have been using Microsemi's proven CCFL solutions for many years in a variety of mainstream applications, and now they can take advantage of Microsemi second-generation LED driving technology for the most energy-efficient designs possible," said Tom Kapucija, director of marketing at Microsemi's Analog Mixed Signal Group. "Microsemi is committed to supporting its customers during their implementation of this new and efficient green LCD TV display technology."
Tuesday, June 2, 2009
FDC, Universal Display advance flexible OLEDs closer to mass market
TEMPE, USA: The Flexible Display Center (FDC) at Arizona State University and Universal Display Corp. introduced the first a-Si:H active matrix flexible organic light-emitting diode (OLED) display to be manufactured directly on DuPont Teijin’s polyethylene naphthalate (PEN) substrate.
Implementing Universal Display's phosphorescent organic light-emitting diode (PHOLED) technology and materials and the FDC’s proprietary bond-debond manufacturing technology, the 4.1-inch monochrome quarter video graphics array (QVGA) display represents a significant milestone towards achieving a manufacturable solution for flexible OLEDs.
Flexible OLEDs are designed to target a number of military and commercial applications that require more rugged displays. With Universal Display’s PHOLED technology and materials, the new display achieves the same brightness as traditional displays with extremely low power consumption. Additional advantages of the technology include lower operating temperature due to less heat being generated, easier to drive, longer battery life, and more stable transistors.
“Being a founding member of the Flexible Display Center, Universal Display is pleased to see the significant progress enabled by our co-operation,” said Mike Hack, Vice President of Strategic Product Development at Universal Display. “Together, the FDC and Universal Display have demonstrated technology paths which will accelerate the introduction of exciting new flexible OLED displays on plastic substrates.”
“This development of flexible AMOLED technology gives the industry a solid starting point towards manufacturing, mass production and commercialization of flexible OLEDs,” said Shawn O’Rourke, director of engineering for the FDC. “The fact that we have achieved a functional flexible OLED manufactured directly on plastic using the Center’s manufacturing process represents a significant achievement, and continued developments over the next few years will lead to full color, full motion video flexible displays.”
The flexible backplane display was manufactured at the Flexible Display Center utilizing a 180°C thin film transistor process. The FDC’s facility implements traditional flat panel and semiconductor tools and processes to achieve flexible displays, enabled by its proprietary bond-debond technology to secure the plastic substrate to a rigid carrier during manufacture.
The integration of Universal Display’s PHOLED frontplane delivers a key enabling technology for the flexible OLED. The PHOLED materials allow the OLED to convert up to 100 percent of the electrical energy into light, as opposed to traditional fluorescent OLEDs which convert only 25 percent, providing up to four times more energy efficiency. Universal Display integrated the FDC backplane designed for its PHOLED frontplane to produce the display.
The FDC and Universal Display will present a paper discussing the active matrix flexible OLED on Friday June 5th in session 65.4 at SID 2009. Additionally, the FDC will demonstrate this device and other flexible display technologies in booth # 523 at the show. Universal Display, located at booth #676 at the show, and DuPont Teijin are members of the Flexible Display Center.
Implementing Universal Display's phosphorescent organic light-emitting diode (PHOLED) technology and materials and the FDC’s proprietary bond-debond manufacturing technology, the 4.1-inch monochrome quarter video graphics array (QVGA) display represents a significant milestone towards achieving a manufacturable solution for flexible OLEDs.Flexible OLEDs are designed to target a number of military and commercial applications that require more rugged displays. With Universal Display’s PHOLED technology and materials, the new display achieves the same brightness as traditional displays with extremely low power consumption. Additional advantages of the technology include lower operating temperature due to less heat being generated, easier to drive, longer battery life, and more stable transistors.
“Being a founding member of the Flexible Display Center, Universal Display is pleased to see the significant progress enabled by our co-operation,” said Mike Hack, Vice President of Strategic Product Development at Universal Display. “Together, the FDC and Universal Display have demonstrated technology paths which will accelerate the introduction of exciting new flexible OLED displays on plastic substrates.”
“This development of flexible AMOLED technology gives the industry a solid starting point towards manufacturing, mass production and commercialization of flexible OLEDs,” said Shawn O’Rourke, director of engineering for the FDC. “The fact that we have achieved a functional flexible OLED manufactured directly on plastic using the Center’s manufacturing process represents a significant achievement, and continued developments over the next few years will lead to full color, full motion video flexible displays.”
The flexible backplane display was manufactured at the Flexible Display Center utilizing a 180°C thin film transistor process. The FDC’s facility implements traditional flat panel and semiconductor tools and processes to achieve flexible displays, enabled by its proprietary bond-debond technology to secure the plastic substrate to a rigid carrier during manufacture.
The integration of Universal Display’s PHOLED frontplane delivers a key enabling technology for the flexible OLED. The PHOLED materials allow the OLED to convert up to 100 percent of the electrical energy into light, as opposed to traditional fluorescent OLEDs which convert only 25 percent, providing up to four times more energy efficiency. Universal Display integrated the FDC backplane designed for its PHOLED frontplane to produce the display.
The FDC and Universal Display will present a paper discussing the active matrix flexible OLED on Friday June 5th in session 65.4 at SID 2009. Additionally, the FDC will demonstrate this device and other flexible display technologies in booth # 523 at the show. Universal Display, located at booth #676 at the show, and DuPont Teijin are members of the Flexible Display Center.
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