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Are your MOSFET’s too hot ?

Diodes Inc’s DFN1212-3 packaged MOSFETs feature a junction to ambient thermal resistance (Rthj-a) of 130ºC/W, power dissipation of up to 1W (continuous) and footprint compatibility with SOT723 alternatives

Diodes Incorporated has launched its first MOSFETs to be housed in the miniature DFN1212-3 package.

Occupying the exact same 1.44mm printed circuit board area and with the same low profile (0.5mm) off-board height as the less thermally efficient SOT723 packaged devices, the new 20V rated DMN2300UFD (N-channel) and DMP21D0UFD (P-channel) MOSFETs offer a junction to ambient thermal resistance (Rthj-a) of 130ºC/W. SOT723 packaged MOSFETs are typically characterised by an Rthj-a performance of 280ºC/W.

The DFN1212-3 package supports a power dissipation of up to 1W under continuous conditions, ensuring significantly cooler operation than that achievable with existing footprint-compatible SOT723 devices. In addition the new MOSFETs presents a typical R DS(ON) of just 400mΩ at V GS of 1.8V, approximately 50% lower than the most popular SOT723 packaged alternatives, helping to dramatically reduce conduction losses and power dissipation.

Diodes’ DFN1212-3 packaged MOSFETs are drop-in replacements for high reliability signal and load-switching applications in a broad range of high portable consumer electronics products including digital cameras, tablet PCs and smartphones.

Customers located in France and Turkey are invited to click here and use the Ismosys Enquiry Service to request data, pricing and sample availability information. Customers elsewhere should visit http://www.diodes.com.

New Memory LCD’s from Sharp

  Integrated image memory means Sharp’s latest Memory LCDs need less than one percent of the power required by conventional TFT LCD

Following its appointment as Sharp Micro Electronics’ pan-European sales and marketing representative Ismosys has released detailsofthe latest additions to Sharp’s extensive portfolio of liquid crystal displays (LCDs) with integrated memory.

4.4” diagonal
Bridging the gap between the 2.94” and 6.02” diagonals the new 4.4” diagonal (11.09 cm) LS044Q7DH01 Memory LCD features a QVGA resolution of 320 x 240 pixels, 17.5% reflectivity and a viewing angle of 120° in all directions ensuring good readability, even in very low ambient lighting. The LS044Q7DH01 is equipped with a transmissive portion of 0.25%, enabling backlighting, to be added for applications that need to be used in the dark. Like all Sharp Memory LCDs, the LS044Q7DH01 is an ultra-low power displays, requiring an input (without backlight) of just 0.25 mW with static images and 0.65 mW with a frame rate of 1Hz.   

1.17” and 1.28” diagonal
At the lower end of its Memory LCD range Sharp has added the LS012B4DG01 (1.17” diagonal) and LS013B7DH03 (1.28” diagonal). The LS012B4DG01 has a length of 35.1 x 11.0 millimetres, a resolution of 184 x 38 pixels and operates in the -10°C and +70°C temperature range, making it ideal for use as a function and control display in battery-operated tools. The relatively long (approx.52 mm) ribbon cable of approx. 52 mm facilitates flexible positioning in the housings of cordless screwdrivers, drills etc.

Despite its compact size of 26.6mm x 30.3 x 0.75mm the 1.28” diagonal LS013B7DH03 offers a relatively high resolution of 128 x 128 pixels with a transmissivity of 0.25%, enabling its use with an optional backlight.

According to Ismosys’ MD Nigel Watts, the new Sharp Memory LCDs require only 0.8 percent of the power needed by conventional displays of the same size: “Because each pixel has a 1-bit memory that stores the image data loaded on the screen image, information only needs to be rewritten in the pixels effected by a change of content when compared to the previous screen frame”, Watts said. “In conventional transmissive LC displays, microcontrollers have to rewrite the entire screen content from frame to frame at a speed of 50 to 60 Hz, even if the majority of image content remains the same, and the backlight accounts for a good percentage of the power consumed. As reflective displays, Sharp Memory LCDs require no routine backlighting.”

The new Memory LCDs primarily target small, portable applications such as test & measuring devices, industrial hand-held equipment, watches, electronic shelf labelling systems, pulse monitors and other fitness devices, electronic shelf labelling systems, where small solar cells are easily able to provide sufficient power to operate the entire application. Sharp also offers Memory LCDs in 3-volt versions for operation with conventional lithium-ion batteries without the need a charge pump.  

Availability
TheLS012B4DG01 and LS013B7DH03 are already in series production. Samples of the 4.4 inch LS044Q7DH01are scheduled to become available before the end of2001 with series production scheduled to begin in Q2 ‘12. The three new Memory LCDs add to Sharp’s portfolio of ultra-low power displays, which now runs to thirteen different models spanning diagonals of 1.17” (2.97 cm) to 6.02” (15.3 cm). Click here and use the Ismosys enquiry service to request the sample and pricing information you need .

Ember IP Stack Demo Features iPad App to Control Multiple Smart Energy Devices


Ember will demonstrate the latest advancements of its IP-based networking stack at the Autovation 2011 show which begins today in Washington, DC and next week at the Smart Homes 2011/Metering Europe event in Amsterdam.

Ember’s IP Stack is targeted at Smart Grid applications, especially smart meters and Home Area Network (HAN) devices. Development of an IP stack to be used in IP-based mains and battery powered HAN devices is an important step in support of the future of the Smart Grid and managing future applications such as micro generation and charging of electric vehicles. It will be Ember’s first public demo since it unveiled its IP Stack roadmap earlier this year at Connectivity in Santa Clara.

Ember’s demo will showcase a Smart Energy app running on an iPad to get consumption information from an electric meter and to control multiple thermostats and load shed devices. The meter and HAN devices are based on the IEEE 802.15.4 standard and IP protocols including 6LoWPAN, RPL, CoAP and EXI, while the iPad uses the IEEE 802.11 wireless protocol to communicate with the devices via a wireless router.

The rapid progress of Ember’s IP Stack is the result of significant investments and engineering efforts by Ember, as well as collaboration with the low-power wireless mesh networking community. The goal is to deliver a protocol that blends the ability to easily monitor and control HAN devices enabling energy savings and load shifting by providing a technology that is reliable, secure and designed to scale through the long life span and evolving needs of Smart Grid systems.

"Ember is committed to pull its weight along with its customers and partners in standards bodies to develop and standardize low-power IP protocols," said Bob LeFort, Ember’s CEO. "Visitors to several upcoming events will get to see Ember’s IP stack in action and the benefits this technology will bring in allowing Smart Energy devices to communicate."

Ember’s demo can be seen at Booth number 216 at the Autovation 2011 show on September 26 and 27 in Washington, DC. The demo will also be shown at booth SH61 during the Smart Homes Conference and Exposition, part of Metering Europe 2011 in Amsterdam, on October 4-6.

New High-Voltage Rectifiers Target Power Factor Correction (PFC) Boost Diode Applications

Housed in its proprietary PowerDI-5 package, a thermally efficient, low-profile, small-form-factor package that enables the design of thinner and cooler products, Diodes Inc’s DSR6V600P5 and DSR6U600P5 high voltage rectifiers are particularly suitable for use in high-density switched mode power supplies (SMPS) for LED TVs and adaptors, as well as re-circulation diodes in high intensity discharge (HID) lighting applications.

With an off-board profile of 1.1mm, the ultra small PowerDI-5 package is 52% thinner than the industry-standard DPak and occupies just 43% of the board space. In addition, it offers significantly lower thermal resistance (R thj-c ), thus enabling higher density designs.

Optimised for use in PFC circuits that operate in continuous conduction mode (CCM), the DSR6V600P5 features low reverse recovery time (Trr ) and reverse recovery charge (Qrr ) to ensure that boost diode reverse recovery losses are kept to a minimum. Similarly, the DSR6U600P5 has been tuned for both low forward voltage drop (VF) and low Trr in order to meet the compromise requirements of those PFC circuits operating under boundary conduction mode (BCM).

Both the DSR6V600P5 and DSR6U600P5 feature a typical softness factor of 0.7, to ensure soft switching with decreased electrical noise that can lead to a reduction of EMI shielding and snubber circuits for simplified design and lower component count.

Use the Ismosys Enquiry Service to request a full datasheet and/or device samples

In sales it’s not who you know, in sales it’s who knows you.

- Jeffrey Gitomer

Come and meet us on the Ember stand at Metering Europe

Click here for full exhibition information

AMD and Microsoft Collaborate To Deliver Next Generation x86 Platforms for Windows 8

Following its recent appointment as AMD Embedded’s strategic sales and marketing representative partner in Southern Europe, Ismosys has released details of the AMD and Microsoft collaboration to empower a new generation of innovative PCs and small form factor computing devices.

Continuing a long history of collaboration, AMD has been working closely with Microsoft to create drivers that support the latter’s upcoming Windows 8 operating system on AMD-based tablets, netbooks, PCs and servers.

Currently available Windows 7-based PCs powered by AMD’s Vision technology deliver multi-core processing for amazing performance, discrete-level graphics for brilliant HD experiences, and AMD AllDay™ Power for entertainment on the go”, said Ismosys MD Nigel Watts. “AMD is the only supplier offering Accelerated Processing Units (APUs), CPUs and discrete GPUs and therefore offers a compelling platform for the forthcoming Windows 8, with native support for Microsoft DirectX® 11, C++ AMP, OpenCL™ and Accelerated HTML5, as well as planned support of DirectX 11.1 features”.

Business customers will benefit from the combination of AMD Opteron™ processors and Windows Server, which will enable cost-effective virtualisation, versatile Web & application serving and capacity-rich data management. Furthermore, AMD’s Vision Engine software is uniquely tailored to unlock visual computing with AMD Radeon™ Cores and video accelerators that enable vivid HD, AMD Steady Video software and accelerated applications like blazing fast Internet browsing.

“AMD has achieved more than 320 design wins for its industry-leading APU technology to date. Leveraging the full performance of 64-bit x86 computing, the most pervasive and robust ecosystem, AMD is delivering the ideal platforms to bring Windows 8 to life on next-generation high-performance computing platforms”, Watts concluded.

New SSD features self-encryption

New SSD features self-encryption to delivers extreme stability and robust security for lap- & desk-top PCs http://bit.ly/nBDR6D Encryption capabilities delivered through a h/w-based, AES-256-bit encryption engine, advanced security f/w & encryption management s/w. Micron’s C400 SED is available in 128-, 256- & 512GB caps., a SATA 6Gb/s i/f and 2.5 & 1.8-inch form factors. More at http://bit.ly/nBDR6D

New Cloud Computing range

New cloud computing range speeds private d/t virtualisation apps - support all major virtual d/t hosts & user types. http://bit.ly/ptBabq Ideal for applications that target the cash-strapped public sector, the Interphase clouDevice™ portfolio includes multi-seat clients that support Windows MultiPoint Server®, enterprise thin clients, and hi-performance PCoIP zero clients.
More at http://bit.ly/ptBabq

Low Power ZigBee Smart Energy Module Targets Metering and Control

Following its appointment to represent embedded hardware and software design consultancy ByteSnap Design Ltd, Ismosys has released details of the ZMM-01, the industry’s first ever ZigBee Smart Energy (SE) module to combine the key features of metering and control in a single, low power platform.

The ZMM-01 simplifies working with ZigBee SE: Implementing a complete ZigBee SE smart meter now only requires the ZMM-01 and the addition of a shunt resistor and current transformer (CT) to be fully compliant with IEC EN62053-21 class 1 or 62053-23 class 2.

According to David Blissett, Ismosys’ ZigBee product specialist, the key to the ZMM-01’s comprehensive capabilities is ByteSnap’s expertise in combining hardware and software design in high-performance, low power consuming devices: “ The ZMM-01 module is based on the market-leading Ember EM357; a ZigBee radio-on-a-chip which integrates a fully compliant IEEE 802.15.4/ZigBee wireless transceiver with the powerful ARM Cortex-M3 microcontroller, able to run the ZigBee Smart Energy protocol and application code while still consuming just 30mA to transmit”, Blissett said..

The ZMM-01 module also implements the Cirrus Logic CS5467 Analogue Front End (AFE); developed specifically for energy measurement applications. The AFE incorporates on-chip functions for measuring voltage and current to calculate active, reactive and apparent power/energy with Energy Linearity: ±0.1% of Reading over 1000:1 Dynamic Range.

The ZMM-01 offers a Smart Energy solution that is ready for system integration. The ZDM-01 Development Kit complements the ZMM-01 Smart Energy module, providing a complete platform for module evaluation and code development.