Charge-pumps brighten display picture Product News 5/31/2004 Post a comment Three new generations of charge-pump from Advanced Analogic Technologies bring a new level of functional, high-efficiency, and cost- and space-saving performance to LED- and LCD-based display applications. These chips maximize brightness in white LEDs (AAT3140/41) in single-cell portable applications, improve camera flash performance (AAT3112), and provide the positive and negative voltages (AAT3190) for thin-film transistor liquid-crystal displays (TFT-LCDs), organic light-emitting diodes (OLED
Leistungselektronik: Knausern als Zukunftstechnik News & Analysis 5/27/2004 Post a comment Die Leistungselektronik sieht sich vor einer glänzenden Zukunft: Während elektronisch gesteuerte elektrische Anwendungen immer weitere Bereiche des Lebens erobern, achten Industrie und Verbraucher immer mehr auf einen wirtschaftlichen Umgang mit der kostbaren Energie. Beide Faktoren kommen der Leistungselektronik zugute. Auf diese Herausforderungen antwortet die Industrie mit einer Flut neuer Produkte, zu besichtigen auf der Fachmesse PCIM.
Light, rugged AC/DC supply delivers 500W Product News 5/26/2004 Post a comment Absopulse Electronics' PFC500-C is a compact and lightweight power supply intended for applications in harsh environments where power factor correction is a key requirement. Its single-output design utilizes a variable-frequency (50-150 kHz) topology for the PFC-input stage and half-bridge topology after the input stage to deliver 500 watts at 28 or 48 volts from a 90- to 264-VAC input (47-420 Hz). The power-factor is corrected to at least 0.97 at full load over the entire input range. The unit,
Power-system-on-chip rises to POL task Product News 5/25/2004 Post a comment Enpirion, Inc. touts its EN5330, intended to bridge the gap between "turnkey" DC/DC modules and semiconductor-style IC solutions, as the world's smallest power system on a chip, largely by virtue of being the first of its kind to feature an advanced integrated inductor. The initial entry in the company's iPower series suited for 3-amp or 10-watt point-of-load (POL) applications including servers, personal computers, laser printers, set-top boxes, and telecommunications and data communications eq
1-W DC/DCs come up big in tight spaces Product News 5/24/2004 Post a comment MicroPower Direct bills its H100 series of low-power, single- and dual-output DC/DC converters as unique in providing a combination of high isolation in a DIP-sized package, high reliability, and a broad range of models. These devices, which come in an 8-pin dual-inline (MiniDIP) package measuring 0.5 by 0.4 by 0.27 inches, deliver 1 watt at up to 300 mA in thirty-two models (3.3, 5, 9, 12, 15, ±5, ±12, and ±15 from a 5, 12, 24, or 48-volt input) for space-constrained and batte
MCM converters plug in to flexible prototyping Product News 5/19/2004 Post a comment Streamlining the prototyping process for intermediate-bus architecture and point-of-load (IBA/POL) designs, Vishay Intertechnology now offers designers plug-in versions of all devices in its FunctionPAK family of fully integrated DC/DC converters. The 8-pin plug-in multichip modules (MCMs) are complete synchronized buck or boost converters with programmable topology and will be particularly attractive to engineering labs with limited assembly equipment.
Raychem expands PolySwitch family News & Analysis 5/19/2004 Post a comment Raychem Circuit Protection, a business unit of Tyco Electronics, has added a 550 mA device to its LVR series of PolySwitch resettable devices, providing the series with a full coverage of applications up to 120 watts at 220 Vac and 60 watts at 120 Vac. The new device increases the maximum hold current rating from 400 mA to 550 mA and helps protect devices from damage caused by overcurrent and overtemperature fault conditions on the primary side of power supplies and transformers.
Controller and plug-in board advance PoE Product News 5/17/2004 Post a comment Texas Instruments' new TPS2375 controller and PTB48540 plug-in power module reduce design time and ease implementation of Ethernet-powered (PoE) industrial and commercial devices such as WLAN access points, IP phones, security and point-of-sale systems.
CCFL inverter displays optimized backlighting Product News 5/17/2004 Post a comment The new W6m Class of DC/AC inverters from Endicott Research Group, for liquid crystal displays (LCDs) backlit by a single cold cathode fluorescent lamp (CCFL), uses a custom on-board IC that's designed to optimize closed-loop current control and provide open-lamp detection in an economical, high-efficiency design. The low-profile (0.24 inch, i.e., 6 mm high) product is suited to battery-powered and portable tasks such as automotive, medical, and military applications, where it's important to kee
Ruggedized DIN-rail supplies deliver up to 480 W Product News 5/12/2004 Post a comment Astec Power's ADN Series of rugged switching power supplies, for mounting on standardized DIN rails, includes five models that deliver from 60 to 480 watts at 24 volts. They're designed for operation at temperatures to 60°C with no derating and no forced-air cooling requirement. Ideally suited for factory automation and a variety of industrial applications, ADN Series models can accommodate the large peak loads needed to run motor-controllers and other devices with high surge-current demands.
New Power Modules Include Supply Voltage Sequencing and Margin Test Capabilities News & Analysis 5/10/2004 Post a comment Power supply systems for the latest digital signal processors (DSPs) and application specific integrated circuits (ASICs) are required to manage how multiple output voltages rise after input power is applied. These supplies must also be capable of starting up into pre-existing output voltages. Another requirement gaining in popularity is supply voltage margining. From the ChipCenter archives, this article describes features and provides examples of how modules from TI are able to meet the latest
Smart controller drives mobile robots Product News 5/8/2004 Post a comment Roboteq's AX2850 is a microcomputer-based dual-channel DC motor controller that delivers up to 120 amps per channel at up to 40 volts for mobile robotic vehicles, including Automatic Guided Vehicles (AGV),
Underwater Remote Operated Vehicles (ROVs), and mobile robots for exploration, hazardous material handling, and military and surveillance applications. It accepts remote commands from either a standard R/C radio device or a serial port interface.
Triple-output quarter-brick simplifies distributed power Product News 5/8/2004 Post a comment Power-One's QNT36ZEDB is a triple-output quarter-brick that delivers 80 watts (for 200 lfm air flow) from a nominal 36- to 75-VDC input. Each output provides up to 12 amps at 0.95 to 5 volts (adjustable). In selected applications this product can provide a single-component alternative to a distributed-power design.
Blog Make a Frequency Plan Tom Burke 17 comments When designing a printed circuit board, you should develop a frequency plan, something that can be easily overlooked. A frequency plan should be one of your first steps ...