Neutral Wire Facts and Mythology Design How-To 10/28/2004 Post a comment This article discusses many common misunderstandings about the function of the neutral wire and its relation to power problems. The subjects of dedicated lines, phase reversal, isolation transformers, and grounding are addressed. Various myths are described and criticized.
165W AC/DC Switchers - are up to 90% efficient Product News 10/28/2004 Post a comment XP announced the IFC165, a 165W open-frame AC/DC switching power supply in a 76 x 127 x 32mm (3" x 5" x 1.25") package. With power density of 8.8W/in3, this ultra-compact power supply fits into a 1U chassis, making it ideal for space-constrained applications in telecommunications, industrial automation, networking and datacom.
52.5V Half-brick Converter - for Power-over-LAN applications Product News 10/28/2004 Post a comment SynQor announced a single output isolated dc/dc converter ideally suited for Power Over LAN, IP Telephony and isolated bus voltage applications. The standard half-brick module is part of the PowerQor Tera series and is capable of delivering 200 Watts of output power at 52.5V.
The Different Types of UPS Systems Design How-To 10/28/2004 Post a comment There is much confusion in the marketplace about the different types of UPS systems and their characteristics. This paper provides indepth definitions and practical application examples to help you make an informed decision about which UPS topology you need.
PoE not just "emerging" anymore Design How-To 10/27/2004 Post a comment Power over Ethernet is not an "emerging" technology anymore, according to Rich Valley of TI. PoE has an international standard and it's deploymed in new products at both ends of the cable. Read how this technology accomplished this feat and what it needs to continue growing.
Triple-output switchers serve low-power medical Product News 10/27/2004 Post a comment Complementing its single-output models announced earlier this year, XPiQ has introduced multi-output versions of the ECM40 and ECM60 families of 40- and 60-watt AC/DC switching power supplies. Approved for Class I and Class II applications, these families provide up to three outputs at voltages ranging from 3.3 to 48 VDC.
SuperH Microcontrollers - with 80MHz high-speed operation Product News 10/27/2004 Post a comment Renesas Technology has announced the SH7080 series, a new generation of SuperH microcontrollers with 80MHz high-speed operation. The devices offer a 1.6-fold improvement in performance over the previous SH7144 series, up to 512-kbyte of on-chip flash memory, capable of constant single-cycle (12.5ns) access, and a comprehensive set of peripheral functions.
Dynamic power in CMOS for WCDMA Power DesignLine Blog 10/26/2004 Post a comment Cell phones have come a long way since they were first introduced. Remember when they were about the size, and weight of a mason's brick? Now, they have dimensions of a couple inches and weight of a few ounces. They have a plethora of new features and function and all of them cost, and not just money. They cost power. What's being done to constrain power usage? Plenty, and here's a link to first rate research.
Power-One posts loss, projects flat quarter News & Analysis 10/26/2004 Post a comment Power supply company Power-One Inc. (Camarillo, Calif.) posted a net loss of $5.4 million on sales of $67.2 million in its third quarter ended September, compared to a loss of $3.6 million on sales of $63.6 million in the year-ago third quarter.
Dual-Range Power Supply - has digital precision Product News 10/22/2004 Post a comment The QL564, new from TTi (Thurlby Thandar Instruments), is a high-performance laboratory power supply which offers two output ranges, enabling higher currents to be used at lower voltages. It can supply up to 2 A at up to 56 V, or up to 4 A at up to 25 V.
DC-to-DC converters - are qualified for space applications Product News 10/22/2004 Post a comment 3D Plus introduced the PMDD04028S series of 3.3V, 5V and 12V single output DC-to-DC converters, ESA and CNES qualified for Space applications. By utilizing advanced topologies, the converters provide excellent reliability, low noise characteristics, high power density and a low profile package.
Lightweight DC/DC is airborne Product News 10/21/2004 Post a comment VPT Inc.'s new low voltage DVWR DC/DC converter delivers up to 25 watts in a tiny, lightweight package with three outputs, including a main output of 3.3 VDC at 10 watts for use in newer aircraft, weapon, satellite and other mission critical systems. "The low-voltage trend continues in today's military, avionics, and space programs," explained Michael Bosmann, senior vice president of sales and marketing. "Unlike many plastic potted products, engineers depend on the fully hermetic DVWR for multi
300-W supply holds up in harsh environments Product News 10/20/2004 Post a comment Absopulse Electronics' PFC65-PX Series of AC/DC supplies is designed for harsh environments. The conduction-cooled unit delivers 300 watts continuous at up to +80°C (cold plate). The power-factor-corrected unit features high immunity to shock, vibration, humidity, moisture, and dust, and is well suited to marine, off-shore, land-based industrial, railway, and military applications.
Custom supplies offer PoE option Product News 10/15/2004 Post a comment Phihong now offers custom power supply solutions that enable Ethernet switches and blades to be field-upgradeable to Power over Ethernet (PoE). The company's customized solutions include power management, AC or DC disconnect, and system programming and monitoring capabilities. "Field-upgradeable solutions are very unusual in the market today," said Keith Hopwood, vice president of marketing. "Our custom solutions allow switch and blade manufacturers to design products that can be sold at competi
Dual-output supplies primed for motors Product News 10/15/2004 Post a comment Lambda's new ZWD dual-output family of power supplies, providing 5 amps at 5 volts and a peak current of 18 amps at 24 volts, can deliver 200% of its nominal current rating for up to 10 seconds. The supplies' peak-current capabilities (24-volt output) thus suit them for powering motors, solenoids, and printers.
Delta Electronics joins power alliance News & Analysis 10/12/2004 Post a comment Delta Electronics, one of the industry's largest power suppliers, has joined the Distributed-power Open Standards Alliance (DOSA), joining Tyco Electronics, SynQor, and Celestica Power Systems.
PWM Controller - advances power conversion performance Product News 10/12/2004 Post a comment Intersil released the ISL6744, an industry-leading double-ended controller intended for unregulated bus converters in 48-V DC-DC and off-line AC-DC power supplies. The ISL6744 delivers economy, flexibility, simplicity and industry-leading performance that places it at the top of the list for power supply designers.
The incredible shrinking core Blog 10/11/2004 Post a comment Magnetics is a terrible embarrassment to many engineers, writes Sanjaya Maniktala, in this month's column on power supply design I suspect they often end up pretending it doesn't really matter ('magnetics-denial'), he says. But dc-dc size, it turns out, is more a function of reliability than of switching frequency. Undersizing the core, he reminds, can have some serious consequences.
DC/DCs deliver compact 15-W solution Product News 10/10/2004 Post a comment MicroPower Direct's single- and dual-output B1500RW DC/DC converters, in a 1-by-2-by-0.4 inch shielded metal case, deliver 15 watts in 18 models for board-level applications ranging from telecom to industrial control to medical equipment and instrumentation. They provide 3.3, 5, 12, 15, ±12, or ±15 volts from a 9-18, 18-36, or 36-75 volt input.
Remotely-configured POL simplifies production testing Product News 10/9/2004 Post a comment Artesyn's SIL15E-12M is a point-of-load DC/DC converter that's remotely configurable, incorporating an I2C bus interface that simplifies precision set-up and control of output voltage and voltage-margining during product development and production test.
Shakeout takes shape in bricks Product News 10/8/2004 Post a comment Focus On DC/DC brick converters—Squeezing the most from brick-style DC/DC converters that operate in increasingly hostile environments remains a high priority for vendors, even as these modules enter the "end-game" as a commodity item. The quest for higher power densities, efficiency and the like is focused on the small converters, with few if any new releases beyond the half-brick. But the smallest of the small isn't necessarily the most sought after. Indeed, the sixteenth-brick initially
Dell recalls laptop supplies News & Analysis 10/8/2004 Post a comment Dell Inc. (Round Rock, Tx.) has voluntarily recalled 2.9 million ac adapters used with some of its Latitude, Precision, and Inspiron notebook PCs, marking the latest industry recall due to overheating concerns in portable products.
Component orders down in September, says ECA News & Analysis 10/7/2004 Post a comment The monthly electronic component order index compiled by the Electronic Components, Assemblies & Materials Association (ECA) dipped in September, confirming an onslaught of reports from various suppliers indicating an industry slowdown.
Intermediate Bus Architecture alleviates stresses on distributed power systems Design How-To 10/5/2004 Post a comment While the classic distributed power solution utilizes multiple isolated converters, or bricks, on each card, the intermediate bus architecture (IBA) offers the potential for significant cost savings and size reduction by providing a single isolation barrier within a very high efficiency converter. In one of several application articles initially solicited for an EE Times magazine supplement, a Celestica applications engineer offers insights into new-generation distributed power systems.
Ethernet-Strom aus nur einem Chip News & Analysis 10/5/2004 Post a comment Eine Single-Chip-Lösung für Power-over-Ethernet (PoE) hat National Semiconductor vorgestellt. Der Baustein erleichtet gegenüber bisherigen Lösungen aus mehreren Chips das Design von PoE erheblich.
Power op-amps deliver cost-effective transducer drive Product News 10/2/2004 Post a comment Apex Microtechnology touts its MP108 and MP111 op-amp style power amplifiers, which employ a new "open-frame" design, as a cost-effective driver solution for piezo- and ultrasonic transducers in industrial and medical applications. The MP111, having a bandwidth of 500 kHz and slew rate of 130 V/microsecond, provides a 50-A pulse output in ± 15 to ± 50-volt systems. The MP108, with a bandwidth of 300 kHz and slew rate of 170 V/microsecond, delivers 10A continuous in ±15 to &plus
1200-W front-end packs 19W/in3 Product News 10/1/2004 Post a comment Cherokee International's new CAR1248 front-end/rectifier intended for low-profile distributed power architectures delivers 25 amps at a regulated 48 volts in a 1U-high enclosure measuring 3.44-by-11.2-by-1.65 inches. It thus provides a best-in-class power density of 19 watts per cubic inch. Up to five such rectifiers can fit in a power shelf to supply up to 6000 W, or 4800 watts N+1 redundant power for low to mid range servers and test equipment applications.