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Power Management

News and in-depth technical information for system designers responsible for specifying or selecting power sources for electronics applications. Topics include power supplies, components including dc-dc converters, batteries, digital power, and alternative energy technology.
Top Story
Top Story

USB-powered battery charger goes faster, cooler, safer 7/21/2008

Texas Instruments' bq24150 USB switch-mode battery-charge-management IC couples high power-conversion efficiency with fast charging and a reverse-boost USB OTG (On-The-Go) mode that generates a voltage supply to power accessories you plug into a mini-USB port, eliminating the need for another discrete device.

News

Voices: National Semiconductor’s David Anderson 7/10/2008

EDN's Paul Rako talks with David Anderson, National Semiconductor's chief technologist for power management, about his long and distinguished engineering career, his company, and the present and future of power management.

Digital power debuts for 48V-dc servers 7/2/2008

Power supplies that rely on analog-control loops may be highly efficient at full load but become less so when the load drops below its tuned “sweet spot.”

Student develops attention-getting gallium-nitride MOSFET 6/26/2008

A student researcher at Rensselaer Polytechnic Institute has developed a gallium-nitride MOSFET that, thanks to its ability to operate in extreme power and temperature conditions, captured the attention of top automakers even before the student graduated in May. Weixao Huang, the son of rural Chinese farmers, developed a new process that enables the construction of the transistor.

Ultralow-power real-time clock extends battery life 6/17/2008

NXP Semiconductor’s PCF2123 real-time-clock has an operating current of less than 100 μA, or 0.15 mW, on a 1.5V power supply

Power-management IC integrates seven programmable regulators 6/10/2008

Summit Microelectronics’ new SMB119 power-management IC provides all the power rails needed for a modern handheld product.
In-Depth

Way, way off the grid: Powering the Phoenix Mars lander 7/10/2008

Prying Eyes: An inside look at the power-generation, -regulation, and -delivery system for the Phoenix Mars lander.

Voltage-mode control and compensation: Intricacies for buck regulators 6/30/2008

Before designing with one of today's powerful buck regulator ICs, you'll want a thorough understanding of voltage mode control and compensation.

Automobile electronics seek to plug power leaks 6/26/2008

Automobile accessories and control electronics benefit from power-management schemes to prevent dead batteries and gas guzzling. Low-power electronic subsystems are especially important for the next generation of electric cars and plug-in electric vehicles.

Estimating junction temperature from top-surface temperature in power MOSFETs 5/30/2008

If you can determine the surface temperature of a MOSFET package with a bench probe, you can get a good idea of the device's junction temperature.

The Tesla Roadster: Sporty and electric 5/14/2008

Prying Eyes: A modern electric sports car presents a unique design challenge.
Experts

Voices: National Semiconductor’s David Anderson 7/10/2008

EDN's Paul Rako talks with David Anderson, National Semiconductor's chief technologist for power management, about his long and distinguished engineering career, his company, and the present and future of power management.

Honest energy, part two: Readers respond on low-power-factor loads 5/29/2008

Reader response to the last installment of Analog Domain has been both strong and informative—so much so that I’d like to share some of the feedback with you.

Honest energy: The danger low-power-factor loads pose for the energy grid 4/2/2008

As typical household products become more sophisticated, the power factor of the load they represent decays—a trend that is exacerbating a growing stress on our electric-power infrastructure.

Voices: GreenPeak Technologies’ Cees Links: wireless-networking visionary 2/21/2008

Cees (pronounced case) Links is an engineer and the chief executive officer at GreenPeak Technologies, an international supplier of low-power wireless-system modules compatible with IEEE 802.15.4 and ZigBee. Based in Utrecht, the Netherlands, Links has been a pioneer in the wireless industry and was involved in the establishment of the IEEE 802.

H1-B questions hit EDN readers' hot button 10/18/2007

Our online career-oriented survey revealed engineers' strong feelings on outsourcing, education, and the profession most would still choose if they had it to do all over again.
DesignIdeas

Touch-activated timer switch extends battery life 7/10/2008

Designed to fit into the battery compartment of an optical mouse, this circuit automatically shuts off the battery after a time delay.

Tester cycles system-power supplies 7/10/2008

A simple two-relay circuit cycles system power on and off to test a design on the benchtop.

Microcontroller controls analog phase shifter 6/12/2008

By using a digital potentiometer in a phase-shift circuit, a microcontroller can precisely control phase shift.

Programmable current source requires no power supply 6/12/2008

A programmable current source is useful for creating I-V curves, charging and discharging batteries, preloading power supplies, and many other applications.

Small capacitor supports telecom power supply during brownouts 5/15/2008

By using a charge pump, the energy stored in a small capacitor can support the operation of a "brick" telecom power supply during brownouts.
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Events

Packaging Technology

Dates: 8/3/2008 - 8/4/2008
Location: Tel Aviv, Israel

Packaging Design

Dates: 8/5/2008 - 8/7/2008
Location: Tel Aviv, Israel

Failure and Yield Analysis

Dates: 8/5/2008 - 8/7/2008
Location: Tel Aviv, Israel

Portable Design Conference & Exhibition

Dates: 9/18/2008 - 9/18/2008
Location: San Jose, CA



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Blog

PowerSource

Plug-in hybrid vehicles: Here’s what GM’s thinking

After the relative gushing of the Atlantic Monthly article about GM’s plug-in hybrid Volt program, the Wall Street Journal followed up almost... 

Plug-in hybrids’ one little detail: The smart grid

I’ll be attending the Plug-In 2008 Conference in San Jose this week. I signed up for it even before I heard that Andy Grove is the keynote sp... 

USB on-the-go extends USB power dominance

Many MP3 players have already bailed on the concept of having a separate power connection/wall wart combination to charge their internal battery pa... 


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