333 results found, displaying items 301 - 320

“The meter’s running backwards!” It’s 1 p.m. on July 27, which means the sun is at its zenith, and the contractor has finally connected our solar system to the power grid for the first time. My wife Vicky is hypnotized, watching the black mark on the edge of the disc in our electricity meter move from right to left—moving pretty fast, truth be told...

National Semiconductor has added three new parts to its high-power-density regulator product line. The LM2830, LM2831, and LM2832 are the first members in a new family of monolithic pulse-width modulation (PWM) converters offering high power density...

Diodes Inc. has unveiled its high-current-density PowerDI323 product platform with new Schottky rectifiers and Zener products. The PowerDI323 product platform aims to meet the demands for portability by providing smaller, more efficient discrete devices...

Advanced Analogic Technologies’ AAT1231 high-frequency, high-efficiency inductive boost dc-dc converter controls white LEDs in portable systems operating from single-cell lithium-ion/polymer batteries. Delivering 50 mA up to 24 V, it can drive up to six white LEDs in series...

The AAT2556 is AnalogicTech’s first multi-function SystemPower IC to combine a battery charger and buck converter in a single package. This new device offers a highly compact and power efficient solution for a growing number of single-cell lithium-ion/polymer battery-based ultra-portable systems, such as Bluetooth headsets, handheld GPS devices, and high-end portable music players...

GE Energy Financial Services, PowerLight Corp., and Catavento Lda have broken ground in building the world’s largest solar photovoltaic project. Located on a 150-acre southern-facing hillside in Serpa, Portugal, the facility’s 52,000 photovoltaic modules will produce 11 MW...

Aiming to simplify power-management circuit design, International Rectifier has expanded its online design tools and added three reference designs for its POWIR+ chipsets. The first series of POWIR+ chipsets are based on IR’s IR3637S and IR3637AS controllers, and are targeted at single-phase synchronous buck converter applications in computing and high-end consumer applications...

Digital control isn’t an incremental improvement to analog, it’s a major paradigm shift. To be viable, digital control must represent a significant advantage in all areas of consideration. It must deliver significant performance advantages over analog plus the more tactical benefits of cost, size, and integration. Today, digital control is a new technology making its way into targeted applications...

Perpetuum has launched a vibration-energy harvester to power wireless and battery-free devices that can send large amounts of data from many types of industrial equipment. The PMG7 microgenerator lets users power sensors, microprocessors, and transmitters for monitoring the condition of plant equipment and machinery without the need for batteries, cabling, or maintenance...

Lighting accounts for a quarter of the total energy consumed by U.S. commercial businesses, according to the United States Department of Energy. The DaySwitch could reduce lighting energy consumption by up to 30 percent in buildings with windows or skylights. Developed by Rensselaer Polytechnic Institute’s Lighting Research Center (LRC), the DaySwitch senses when there’s enough daylight...

Engineers, environmentalists, and scientists have long been searching for a source of inexpensive renewable energy that can meet the world’s increasing energy needs. Now, one Florida State University (FSU) researcher is exploring ways to work with existing technologies to enable individuals to generate the energy they need to power their home—and even their car...

There are paper cups, paper napkins, and even paper airplanes. So why not paper batteries? Although not powerful enough to drive everyday products like cell phones and digital cameras, an emerging generation of thin, flexible, paper-based batteries could soon find a home powering tiny label displays, smart cards, RFID tags, and other mobile devices requiring only modest amounts of power...

International Rectifier’s IRF7835PbF and IRF7836PbF are 30-V synchronous buck HEXFET MOSFETs intended for dc-dc synchronous point-of-load (POL) converters. The SO-8 MOSFETs are well suited for systems requiring small size, high efficiency, and improved thermal conduction...

As promising as hydrogen fuel cells are for automotive and mobile electronic applications, a barrier to their practical use has been the inability to store enough hydrogen fuel at the proper pressure, temperature, and concentration. Now, chemists at UCLA and the University of Michigan are reporting progress on two of those fronts, and they've got some ideas for how to tackle the third...

It’s not a good idea to scrimp when it comes to a UPS (uninterruptible power supply). A corrupted hard drive from a crashing system will destroy data as effectively as a virus. I have every device plugged into a UPS in my lab except laser printers, and I have been...

Conventional wisdom in consumer electronics, driven by Moore's law, calls for increasing functionality on single SoCs. But the laws of physics (heat, current leakage, crosstalk, etc.) have all but eliminated Moore's law as a gating factor for functional integration in consumer electronics. Modern microprocessors drain batteries like the engine of a Hummer drains...

• Build A Smart Battery Charger Using A Single-Transistor Circuit
• Efficient DC-To-AC Inverters Charge Equipment Racks
• DC-AC inverter targets electroluminescent applications
• Easy-To-Build AC Power Meter
• Voltage-To-Current Converter Works From A Single-Supply Rail