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Power Management

Steve Taranovich
Editor
In-depth technical information, product advancements, and industry news for engineers responsible for designing, specifying, or selecting power sources for electronics applications. Topics include power supplies, power management and regulation components, batteries, digital power, and alternative energy technology.

New Ampere won't affect your measurements

Unless you work at the highest levels of metrology, the change in how the Ampere is realized won't affect you. Read More...

DOE challenges lighting engineers with PAR38 competition

Here’s a competition launched by the U.S. Department of Energy (DOE) to spur lighting manufacturers to develop super high-quality, high-efficiency LED replacements for two of the most commonly used bulbs. What are you waiting for? Read More...

Global regulations on external power supplies and their implications

Power supply manufacturers need to adapt to the strictest efficiency and no-load power consumption requirements in the world with the newest U.S. DOE Energy and EU Code of Conduct (CoC) Version 5 external power supply regulations. This article looks at the new rulings and their impact on the power supply market. Read More...

Buck Switcher Thevenin Resistance

In a buck converter I was working on, the output voltage nominally equaled the input voltage times the switching duty cycle. Read More...

Transphorm GaN system-level power conversion solutions enable new performance

At APEC this year, I met with Primir Parikh, President and co-founder of Transphorm. Parikh emphasized that their GaN on silicon solutions are the only JEDEC qualified products in the industry. Read More...

Apex Microtechnology shows why hybrid ICs are still valuable to the electronics industry

I recently visited Apex Microtechnology, a privately held manufacturer of precision power analog monolithic, hybrid and open-frame components in Tucson, AZ. Read More...

Cranking simulator made easy

Matthias Ulmann outlines how to simulate and manage the drop of battery voltage during cranking of an engine. Read More...

Big batteries, big issues

Forget those small rechargeable cells for now and think about the implications of the much, much, larger ones that are becoming more common. Read More...

Automotive battery sensor packs MCU and CAN controller

Aimed at both conventional and emerging battery chemistries for automotive and industrial applications, the MM9Z1J638 battery sensor from Freescale Semiconductor combines three measurement channels, a 16/32-bit MCU, LIN 2.2 protocol and physical interface, and CAN protocol controller in a 48-pin QFN package. Read More...

Nanotech battery charges smartphone in 30 seconds

A nanotechnology startup has demonstrated a fast-charge battery prototype that is claimed to be able to charge smartphones and other devices in just 30 seconds. Read More...

Powering image sensors in automotive camera applications

Learn about the design of efficient, low noise power supply subsystems by following the reengineering process for an existing camera module. Read More...

Combining Ericsson and Philips technology to get Zero Site

Every once in a while a design comes along that has cleverly integrated electronics functionality with aesthetics. Check out the Zero Site design that Ericsson and Philips have created. Read More...

Product How-to: Fly-Buck adds well-regulated isolated outputs to a buck without optocouplers

In this article, we discuss the basic operation and design of a Fly-Buck™ converter. This discussion also includes a detailed explanation about the control and regulation of this converter. Read More...

Nuvation at EELive: The fun in electronics design

I have always admired Mike Worry, Chief engineer and CEO of Nuvation, and his philosophy of having his talented design team work on challenging customer projects during the day and on “fun-to-do” projects after hours that many engineers love to do. Read More...

>> SEE ALL

LTC Design Notes: Micropower Isolated Flyback Converter with Input Voltage Range from 6V to 100V

A tiny, integrated flyback converter requires minimal support components. Read More...

Smart ripple canceller offers near-zero dropout

Eliminate linear power supply ripple losslessly! Read More...

Design Notes: 60V, Synchronous Step-Down High Current LED Driver

Highly efficient high-power LED controller/driver also facilitates MPPT. Read More...

Latching power switch uses momentary pushbutton

This could be the cheapest way yet to convert a momentary switch into an on-off power controller. Read More...

Momentary switch controls mains with latch-on and remote shutdown

Convert a momentary switch into one that latches as well as protects loads from rapid cycling. Read More...

HV flyback converter improves efficiency

High-energy, high-voltage capacitor charging will benefit from the concepts in this DI. Read More...

Multiple PSUs share load

Combine two or more power supplies to share a heavy load. Read More...

Leakage-energy recuperating winding self-supplies a DC-DC converter

Use a bifilar winding as a snubber to clamp ringing and power the PWM controller IC. Read More...

Recover the leakage energy of a flyback transformer

This design can recover the leakage energy of a flyback transformer and minimize over-voltage stress to the switching device. Read More...

Gate-drive transformer eases multi-output, isolated dc/dc-converter designs

Use this small transformer to produce four isolated outputs of about 1W each. Read More...

Three-channel white-LED driver uses simple step-down dc/dc converter

Drive multiple LEDs with current mirrors from a single step-down converter. Read More...

Dual regulator handles two input voltages

Use a pair of MOSFETs to switch between 3.3 and 5V regulated voltage. Read More...

Use a boost regulator beyond its rated voltage

Use an external FET in a common-gate cascode configuration. Read More...

>> SEE ALL

Power connector provides 60A to backplane line cards

Molex' EXTreme OrthoPower design solves a high-current delivery problem; the orthogonal direct-power connector configuration uses split-blade technology to deliver 60.0A total power to backplane line cards. Read More...

Current transducers measure to 25A, in PCB-mount format

LEM has added to its range a series of open-loop Hall-effect ASIC based devices measuring up to 25A DC, AC or pulsed Read More...

Automotive battery sensor packs MCU and CAN controller

Aimed at both conventional and emerging battery chemistries for automotive and industrial applications, the MM9Z1J638 battery sensor from Freescale Semiconductor combines three measurement channels, a 16/32-bit MCU, LIN 2.2 protocol and physical interface, and CAN protocol controller in a 48-pin QFN package. Read More...

Low-power boost regulator targets energy harvesting

Analog Devices’ ADP5090 is offered as the most efficient ultra-low-power boost regulator for photovoltaic and thermoelectric energy harvesting systems. Read More...

650V IGBTs claim 40% lower turn-off energy losses

ST's HB series of IGBTs claim up to 40% lower turn-off energy losses than competing high-frequency devices while reducing conduction losses by up to 30%. Read More...

MOSFETs target high-current motor control and power designs

Texas Instruments’ latest NexFET mid-voltage power MOSFETs include lowest on-resistance 80-V and 100-V devices in TO-220 packages. Read More...

Microchip announces 8-bit PIC uC Family with Intelligent Analog at EE Live!

The 11-member family of MCUs integrates two Op Amps, a 10-bit ADC, a 5-/8-bit DAC, 10-bit PWM modules and high-speed comparators . Read More...

Power platform targets smaller portable adapters

NXP Semiconductors’ GreenChip TEA1836 and TEA1892 devices are designed to enable ultra-small 45W adapters and power supplies for notebooks, ultra-light notebooks, set top boxes and other devices. Read More...

Power film capacitors suit PFC and AC filtering

Featuring a dual safety system, FLB Series capacitors from AVX exhibit high contact reliability, high ripple current, and extremely high dielectric strength, as well as offering higher rated voltages than comparable technologies Read More...

Buck-boost/boost switching regulators target mobile devices

Intersil has introduced high-integration switching regulators that are designed to obtain the maximum usable life from the typical single-cell lithium-ion battery used in mobile devices. Read More...

ST schedules high-temp SiC MOSFETs for volume production

STMicroelectronics will soon begin production of the first in a family of SiC high-voltage MOSFETS with a 200°C rating for more efficient, simplified designs. Read More...

High-power TVS diodes for AC/DC power line applications

Bourns has added to its high power TVS diodes for use in DC bus protection applications. The new models deliver high current bidirectional port protection that meets IEC 61000-4-5 8/20 µsec current surge requirements and are RoHS compliant. Read More...

Use case-based system automates battery life analysis for mobile devices

Spirent Communications has launched the Quantum automated system for measuring and driving improvements to the battery life of mobile devices. Read More...

Intelligent power driver handles extreme temps

X-REL Semiconductor has unveiled what is claimed as the first monolithic isolated intelligent power driver for SiC, GaN and Si power switches that is able to operate at extreme temperatures. Read More...

Energy harvester PMIC works with thermoelectric generators

The LTC3107 from Linear Technology is a dc/dc converter that allows systems to switch between a battery cell and capacitor used to store harvested energy. Read More...

Get eight 12-bit channels over USB 3

Pico Technology's PicoScope 4824 provides eight 12-bit analog inputs and a waveform generator onto a PC-based package that runs over USB 3.0. Read More...

>> SEE ALL

Teardown: Cell-phone charger: nice idea done right

The Mophie juice pack powerstation mini smartphone and USB-device battery charger demonstrates the ability to provide more than twice the battery life to your smartphone while still keeping a low-profile shape that slips right into your pocket. Read More...

Teardown: Samsung Galaxy S4

TechInsights examines the innards of Samsung's latest and greatest smartphone. Read More...

Cell-phone charger: nice idea, bad implementation

Now and again you come across a device that’s so simple, useful, and functional that you’re glad to add it to your already-overladen workbag; that is, until it breaks, for the dumbest of design reasons. Read More...

Teardown: The power inverter - from sunlight to power grid

This teardown of a solar inverter card traces the path of harvested DC power from the photovoltaic panel, through boost conversion, power inverter and massive filtering of the created AC power signal required by the power grid. Surrounded by monitoring and microcontroller magic along with safety standard adherence, we uncover the mysteries of solar energy harvesting electronics. Read More...

Evaluate your application's energy-harvesting vibrational profile with a Slam Stick

To know whether your application is suitable for vibrational energy harvesting, you must determine its vibrational profile. Mide Technology's Slam Stick data logger and open-source software can ease your profiling task. Read More...

What's inside a smart meter? iFixit tears it down

When iFixit's Kyle Wiens had the opportunity to tear down an Elster smart meter, he jumped at it—not to come up with a repair manual but to evaluate the health and safety issues that seem to surround the utilities’ installation of smart meters. Read More...

Simple battery technology packs in more features with complex chemistries

The basic components are the same across all rechargeable lithium-ion cells, the workhorses of portable energy storage. Read More...

Way, way off the grid: Powering the Phoenix Mars lander

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

Microfuel cell enables ubiquitous computing

Prying Eyes examines a fuel-cell-based power pack for handheld devices, such as cell phones and MP3 players. Read More...

Hybrids mark the end of the stinky city bus

Prying Eyes looks inside a hybrid gas-electric bus powered by 288 ultracapacitors. Read More...

>> SEE ALL

DOE challenges lighting engineers with PAR38 competition

Here’s a competition launched by the U.S. Department of Energy (DOE) to spur lighting manufacturers to develop super high-quality, high-efficiency LED replacements for two of the most commonly used bulbs. What are you waiting for? Read More...

Global regulations on external power supplies and their implications

Power supply manufacturers need to adapt to the strictest efficiency and no-load power consumption requirements in the world with the newest U.S. DOE Energy and EU Code of Conduct (CoC) Version 5 external power supply regulations. This article looks at the new rulings and their impact on the power supply market. Read More...

Transphorm GaN system-level power conversion solutions enable new performance

At APEC this year, I met with Primir Parikh, President and co-founder of Transphorm. Parikh emphasized that their GaN on silicon solutions are the only JEDEC qualified products in the industry. Read More...

Apex Microtechnology shows why hybrid ICs are still valuable to the electronics industry

I recently visited Apex Microtechnology, a privately held manufacturer of precision power analog monolithic, hybrid and open-frame components in Tucson, AZ. Read More...

Cranking simulator made easy

Matthias Ulmann outlines how to simulate and manage the drop of battery voltage during cranking of an engine. Read More...

Powering image sensors in automotive camera applications

Learn about the design of efficient, low noise power supply subsystems by following the reengineering process for an existing camera module. Read More...

Product How-to: Fly-Buck adds well-regulated isolated outputs to a buck without optocouplers

In this article, we discuss the basic operation and design of a Fly-Buck™ converter. This discussion also includes a detailed explanation about the control and regulation of this converter. Read More...

Nuvation at EELive: The fun in electronics design

I have always admired Mike Worry, Chief engineer and CEO of Nuvation, and his philosophy of having his talented design team work on challenging customer projects during the day and on “fun-to-do” projects after hours that many engineers love to do. Read More...

AC and DC drives for the universal motor

For low-cost, moderate-performance motor applications, it’s hard to beat the universal motor. This article examines the benefits and challenges of AC and DC drive architectures for the universal motor, and provides theory of operation for both. Read More...

PCB characteristics affect PDN performance

Since no impedance path is perfectly flat, we need to make some design adjustments. This article aims to help you make compromises that have the minimum impact on the system performance. Read More...

>> SEE ALL

04.14.2014

Global regulations on external power supplies and their implications

Power supply manufacturers need to adapt to the strictest efficiency and no-load power consumption requirements in the world with the newest U.S. DOE Read more...

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