2041 results found for Power, displaying items 1 - 20
July 1, 2009
[TechScope] ZigBee Alliance Releases the Battery-Free, Energy-Harvesting Green Power Standard
ZigBee Green Power, introduced by the ZigBee Alliance, is an energy-harvesting, battery-free feature set designed to create a global, standard technology for self-powered devices. Without needing wires or batteries, according to the Alliance, these new devices are compatible with ZigBee and ZigBee PRO networks and can enable maintenance-free, environmentally friendly products.
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Staff
June 30, 2009
[Web Exclusive] eBook: Building Battery Arrays with Lithium-Ion Cells
Large scale arrays based on Li-ion batteries can provide the high voltage, current, and capacity required by many emerging portable markets; however, there are numerous problems facing the designers of larger battery packs, and this paper outlines the techniques for achieving high voltage or capacity by building high cell count arrays.
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ED News Staff
June 25, 2009
[Eye On Europe] Rugged Power Supplies Endure Hostile Economic Environments
Power supplies not only need to be powerful and efficient, they also must meet performance and reliability requirements for rugged and demanding environments, such as military and medical applications. Two European companies are rising to the occasion, with the SL Power Electronics MINT1110 series and the Powersolve Electronics PSL400BP.
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Paul Whytock
June 25, 2009[Pease Porridge] Bob's Mailbox
HI BOB, I read your response to Arthur Williams in the April 23 column (“Bob’s Mailbox”). The answer as to whether or not to remove the ground plane underneath inductors is: it depends. If the inductors are cans or toroids, it does not matter as the fields are contained inside the inductor. If the inductors are air wound or chip inductors, it might be best to try...
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Bob Pease
June 25, 2009[Leapfrog: First Look] Tool Automates Power Optimization Of Embedded SoC Memories
System-on-a-chip (SoC) design teams have long labored to optimize their creations for power, but doing so in the memory portions of the devices has lagged behind. Today’s memory-IP (intellectual property) providers build complex power-management schemes into their products, yet the design of the control logic to take maximum advantage of these schemes is daunting. Attempts to get a handle on dynamic power consumption using sleep modes are...
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David Maliniak
June 25, 2009[TechView: Analog & Power] USB Isolator Simplifies Safety In Medical, Industrial Apps
In embedded applications that use the PC architecture, the USB interface has supplanted RS-232 for remote control, diagnostics, firmware updates, configuration of operational settings, and data exchange. As with its predecessor, one drawback to USB in medical and certain industrial applications is the lack of a provision for isolation in the basic standard, though mains-powered patient monitors require it for safety cer tification, and...
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Don Tuite
June 25, 2009[Ideas For Design] Logic-Level Signals Shifted To Dim ?48-V LED Driver
The main source of power in a telecommunications system is -48 V. This source’s negative polarity and its large magnitude with respect to ground pose a challenge when designers want to use low-power ICs in the telecom system’s application circuits. Fortunately, the emergence of high-voltage ICs—with operating voltages of 75 V and higher—has enabled the use of simple biasing techniques in designing circuits for -48-V systems. The technique described here provides...
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Ahmad Ayar
June 25, 2009[Ideas For Design] Seamless Power Switcher And Battery Charger Solution Targets Portable Devices
In today’s world, there are many applications for portable devices. These devices must have extremely low or no battery drain when turned off and need to charge their on-board batteries when connected to an external power supply, whether the device is turned on or not. This circuit provides seamless switching from batteries to external power and provides a simple charging solution. In addition, there are several output signals for a microcontroller (MCU). This...
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Jim Wilson
June 18, 2009
[New Products] Small Step-Down DC-DC Converter Sustains Up To 17 V
Designed for telecom and computing systems, the Texas Instruments TPS54620 SWIFT single-chip point-of-load device (POL) sustains up to 17 V. As an addition to its other power-management ICs, this 6-A synchronous switcher features integrated FETs. It’s 60% smaller than multi-chip converters, according to TI, takes up less than 195 mm², and is one-fourth the size of a postage stamp.
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Staff
June 18, 2009
[TechScope] Hybrid Auto Uses Nanotechnology To Improve Efficiency
XP Vehicles is ready to launch a new development in the automobile industry designed to reinvent the basics of car design. Its model, the Mini Utility Vehicle (MUV), is a battery/fuel- cell hybrid that utilizes new technology in an attempt to improve safety, reduce costs, and increase its range as an electric car (see the figure).
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Kelly Allegra
June 17, 2009
[New Products] Common-Mode Choke EMI Filter Offers Integrated ESD Protection
ON Semiconductor’s NUC2401MN common-mode choke and electrostatic discharge (ESD) protection IC is designed for high-speed data line applications. According to the company, this device rids the low-voltage differential signaling (LVDS) interfaces of common mode noise, which becomes necessary when working with high bandwidth.
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Staff
June 16, 2009
[New Products] DC Power-Supply Family Provides Eight Times More Power Than Predecessors
Agilent Technologies has introduced its N8700 series of dc power supplies. With capabilities identical to the N5700 series, the company says it has improved upon the older model with more than eight times the power density. This new series’ power density, at 5200 W in a 2U-high (2-EIA rack unit) package, also has PC-standard I/O with LAN (LXI-C), USB, and GPIB included.
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Staff
June 16, 2009
[TechScope] U.S. CTO Chopra Addresses CEA Show In NYC
Appointed by President Obama in April, U.S. CTO Aneesh Chopra made his first public appearance and gave the keynote address at the Consumer Electronics Association (CEA) Line Shows and Digital Downtown Conference Program held in New York, June 10-11. During his speech, he outlined the four pillars of his plans for the U.S. as well as fielded questions from the audience.
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Kelly Allegra
June 18, 2009[Technology Report] Motor Control: More Than Just Switching MOSFETs
Enter “motion control” or “motor control” into your favorite search engine, and you’ll be rewarded with links to an ad-hoc encyclopedia of solid design information. Freescale’s site (www.freescale.com/webapp/sps/site/overview.jsp?nodeId=02M0zpbnQXGM0zpqCKS2&tid=tMCdr) is broad, deep, and far more than a product selection guide—which it...
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Don Tuite
June 18, 2009[Technology Report] Auto Electronics Revs Up For "Greener" Pastures
The automobile and electronics industries are struggling mightily through this economic tumult. Straddling these two giants, however, is a shining beacon—auto electronics. At last year’s Convergence Conference, a panel of experts from General Motors, Ford, Chrysler, Honda, and BMW suggested that the cost of electronics in a car will increase beyond the oft-quoted 20% figure and climb to 40% to 50%. Getting more extreme, Honda senior...
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Roger Allan
June 18, 2009[Editorial] How Do We Get Out Of This Mess? Try New Ideas
Life if full of unassailable assumed truths, and it’s an often disturbing but always constructive exercise to challenge them. Let’s start by questioning an easy one from everyday life: are you a good driver? Your instinctive answer is undoubtedly yes, and you would receive the same answer from anyone else you ask. But there are obviously loads of hopeless drivers on the roads. It just so happens that you, or anyone that’s asked, isn’t one of...
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Joseph Desposito
June 11, 2009
[New Products] 4-A Multi-cell Battery-Charger Controllers Require No Blocking Diode
The LTC4012, LTC4012-1, and LTC4012-2 switch-mode battery-charger controllers from Linear Technology target multiple battery chemistries. The LTC4012 supports Li-ion/polymer, NiMH, NiCd, and sealed lead-acid battery chemistries in single-cell and multi-cell configurations. The LTC4012-1 and LTC4012-2 use a programmable internal resistor divider to charge from one to four series lithium cells at multiples of 4.1 and 4.2 V, respectively.
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Staff
June 11, 2009
[New Products] 3-MHz DC-DC Converter Improves Efficiency, Density In Portable Devices
The ADP2108 dc-dc converter from Analog Devices is designed to provide better energy efficiencies in battery-powered portable devices. Balancing low operating input voltage capability, low quiescent current, and small size, the 3-MHz, 600-mA device offers designers more flexibility in meeting strict power and printed-circuit board (PCB) area budgets without increasing battery capacity, according to the company.
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Staff
June 11, 2009
[New Products] Overvoltage Protectors Also Provide USB Charger And ESD Protection
The MAX14529E and MAX14530E overvoltage protectors (OVPs) from Maxim Integrated Products provide high-current USB charger detection. They use an integrated MOSFET to protect low-voltage systems against voltage faults up to 28 V, eliminating the need for an external nFET. Additionally, they provide robust electrostatic-discharge (ESD) protection (Human Body Model).
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Staff
June 11, 2009[Ideas For Design] Spice Model For An Ideal Transformer Allows Bi-directional Operation
This Idea For Design provides an alternative to an earlier IFD that noted that Spice does not have a device model for an ideal transformer (“A Spice Model For The Ideal Transformer”). The author explained, “Instead, Spice provides a coupled-inductor model in the K statement that includes self and mutual inductances.” The author’s proposed solution is a model that...
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Ken Hatch
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