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.

LTC Design Note: 42V quad monolithic synchronous step-down regulator with 30μA quiescent current

This circuit impresses with four 2.2MHz bucks in a tiny package. Read More...

New UPS efficiency standards proposed for U.S.

Are uninterruptible power supplies about to become more energy efficient in the U.S.? Read More...

Reach beyond traditional powering scenarios with ultralow IQ buck-boost converters

The buck-boost converter’s three-way flexibility can replace two ICs (a separate buck converter or a low-dropout linear regulator, plus a boost converter), which greatly enhances battery life in portable systems. Read More...

"Digital" sundial: ancient clock gets clever upgrade

Even this oldest of time-indicating instruments can be upgraded to "digital," but in a very non-obvious, non-electronic way. Read More...

A unique energy improvement approach to solar-powered flight

How can we limit the pollution that all the passenger and private aircraft produce each day? Clean energy is coming. Read More...

Let’s clear the air: analog and power management of environmental sensor networks

This overview of a typical environmental sensor network system design for analyzing outdoor air focuses on analog and power management design aspects that can be employed in a smart city or region. Read More...

The homes of EDN

Take a tour of EDN's office locations through the years, including the home of the print collection. Read More...

SiC-based MOSFETs offer dramatic benefits in automotive, power applications

As conventional silicon-based MOSFETs mature, they are now reaching their theoretical limits of performance. Wide band-gap semiconductor devices represent an interesting alternative for improving performance due to their electrical, thermal, and mechanical properties. Read More...

1950s vintage Design Ideas

EDN started publishing in 1956, and the Design Ideas section was there from the beginning. But … with a twist. Read More...

Charge-pump topology doubles voltage, breaks DC path

This unusual charge-pump voltage multiplier Design Idea not only doubles the input, but has a pseudo-floating output. Read More...

Electric plane design offers insight into design constraints

An aircraft with electric motors offers insight into design constraints but also invites new options. Read More...

Efficient powering of a robot swarm

Swarm robotics design follows the behavior of insects operating in a group, such as ants and bees. Autonomous robots need to be aware of their power system, especially regarding battery life. Read More...

A look at Vicor’s Power System Designer tool

Vicor's power system design tools can help circuit designers maximize their time. Read More...

LTC Design Note: Dual 9A, step-down μModule regulator with digital power system management

This power micro-module includes voltage control and telemetry readback (including temperature, Vin/out, & Iin/out) via PMBus. Read More...

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LTC Design Note: 42V quad monolithic synchronous step-down regulator with 30μA quiescent current

This circuit impresses with four 2.2MHz bucks in a tiny package. Read More...

Charge-pump topology doubles voltage, breaks DC path

This unusual charge-pump voltage multiplier Design Idea not only doubles the input, but has a pseudo-floating output. Read More...

LTC Design Note: Dual 9A, step-down μModule regulator with digital power system management

This power micro-module includes voltage control and telemetry readback (including temperature, Vin/out, & Iin/out) via PMBus. Read More...

Circuit delivers constant power to a load

Here’s a novel way to supply constant power to an ill-defined load. Read More...

LTC Design Note: Determine balancing current for the LTC3305 lead-acid battery balancer

Delve into PTC thermistor intricacies to optimize battery-balancing designs. Read More...

LM317 smooths but doesn't regulate

I once needed to clean up a power supply output, but it didn't need to be regulated. Read More...

UVP protects rechargeable batteries

Protect rechargeable batteries from deep discharge with this UVP & load switch. Read More...

LTC Design Note: Monolithic linear battery charger operates from inputs up to 60V

For lower current, keep-alive battery charging, a simple yet richly featured linear solution can be ideal. Read More...

New slope compensation method stabilizes switchers

Add slope compensation to any switching controller and topology. Read More...

Circuit remotely adjusts PSU voltage

This DI circuit allows for remote regulator/PSU programmability or trimming. Read More...

LTC Design Note: 55V High efficiency buck-boost power manager and multi-chemistry battery charger

A versatile, efficient, multi-chemistry battery charger design operates in buck & boost modes. Read More...

Shunt circuit clips large transients or regulates voltage

This clipper/shunt Design Idea is scalable from low to very high currents. Read More...

LTC Design Note: Control the voltage of a remote load over any length of copper wire

Read about how a unique component compensates for DC conductor loss without using extra sense wires. Read More...

>> SEE ALL

Half-bridge power IC packs GaN FETs

The DA8801 from Dialog Semiconductor combines GaN power FETs with analog drivers, logic, and protection to form a 650-V half-bridge. Read More...

Power source delivers 18 kVA

Part of Pacific Power’s AFX series, the 3180AFX provides programmable AC, DC, and AC+DC power to single, split, or three phase loads. Read More...

Buck regulator is resistor-programmable

A current-mode step-down regulator from Linear Technology, the LTC3623 needs a single resistor to adjust its output from 14.5 V to 0 V. Read More...

Buck-boost ICs improve light-load efficiency

Intersil’s ISL91127 and ISL91128 buck-boost regulators with 4.5-A switches offer a quiescent current of only 30 µA and up to 96% efficiency. Read More...

Diverse wall-plug supplies conserve energy

Spanning 5 W to 36 W, XP Power’s VEL and VER series of wall-mount plug-in power supplies meet international energy efficiency standards. Read More...

Step-down charge pump accepts wide input range

A high-voltage power supply IC, the LTC3256 from Linear Technology takes one positive input and generates 5-V and 3.3-V step-down supplies. Read More...

Power supply IC packs eight buck regulators

Aimed at systems requiring multiple low-voltage supplies, Linear Technology’s LTC3374A offers two to eight independent regulated outputs. Read More...

LDO regulator comes in bumpless CSP

STMicroelectronics offers the LDBL20, a tiny 200-mA LDO regulator that is small enough for use in wearables devices and flexible electronics. Read More...

Medical/ITE supplies furnish up to 60 W

TDK-Lambda KMS-A board-mount AC/DC power supplies come in 15-W, 30-W, and 60-W versions with both medical and ITE certifications. Read More...

Industrial/medical converters supply 6 W

ASA 6W-M series DC/DC converters from Artesyn provide 4000-VAC reinforced insulation and carry a 2X MOOP rating. Read More...

A look at Vicor’s Power System Designer tool

Vicor's power system design tools can help circuit designers maximize their time. Read More...

Wireless transmitter is QI-certified

The bq501210 is a WPC V1.2-compliant wireless power transmitter from Texas Instruments that delivers up to 15 W. Read More...

Supplies charge energy-storage systems

Suitable for battery charging, the EVS series of AC/DC supplies from TDK-Lambda offers adjustable float voltage and constant-current settings. Read More...

High-voltage converter targets smart homes

VIPer01 from ST Microelectronics is an offline AC/DC converter that integrates an 800-V avalanche-rugged MOSFET with PWM current-mode control. Read More...

Gain-block amp operates over wide bandwidth

A 15-dB gain-block amplifier, the LTC6433-15 from Linear Technology offers high linearity and low noise over a bandwidth of 100 kHz to 1.4 GHz. Read More...

Converter meets railway requirements

The Powerbox LBVS (Low Battery Voltage Start) unit powers railway equipment when the main battery is below the minimum operating voltage. Read More...

>> SEE ALL

Teardown: Is the Mighty Charger a good investment?

Is a charger for alkaline batteries a good investment? And what internal circuitry helps it accomplish this objective? This review and teardown project attempts to answer both questions. Read More...

Teardown: Apple iPhone 6 Plus battery

A look at Apple's iPhone 6 battery helps nail down the one variable that determines manufacturing cost. Read More...

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: Gigabit Ethernet switch shut down by lightning strike

A lightning bolt-generated EMP may have entered through the switch's port(s) and KO'd the controller inside. What are your theories? 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...

>> SEE ALL

Reach beyond traditional powering scenarios with ultralow IQ buck-boost converters

The buck-boost converter’s three-way flexibility can replace two ICs (a separate buck converter or a low-dropout linear regulator, plus a boost converter), which greatly enhances battery life in portable systems. Read More...

Let’s clear the air: analog and power management of environmental sensor networks

This overview of a typical environmental sensor network system design for analyzing outdoor air focuses on analog and power management design aspects that can be employed in a smart city or region. Read More...

SiC-based MOSFETs offer dramatic benefits in automotive, power applications

As conventional silicon-based MOSFETs mature, they are now reaching their theoretical limits of performance. Wide band-gap semiconductor devices represent an interesting alternative for improving performance due to their electrical, thermal, and mechanical properties. Read More...

Efficient powering of a robot swarm

Swarm robotics design follows the behavior of insects operating in a group, such as ants and bees. Autonomous robots need to be aware of their power system, especially regarding battery life. Read More...

Juno solar power 588 million km from the Sun

The Juno spacecraft has an amazing solar array that has powered the dauntless spacecraft on its 5 year journey into space. Read More...

Semitrex reveals Tronium technology for energy saving power designs

Now that the patents have gone through, Semitrex is revealing the innovative design details that will advance the global sustainable initiative. Read More...

Power in the supply chain from SEMICON West 2016

At SEMICON West, I experienced all of the diversified links in the chain and innovative equipment and tools that make a reliable and robust IC happen in volume. Read More...

Power system management addressing

This article presents the fundamental design principles underlying the Linear Technology PSM family, details on product family differences, and practical examples and advice. Special cases, such as invalid nonvolatile memory (NVM), will also be discussed. Read More...

10 predictions for the next 60 years in power electronics

As we look back on 60 years of EDN, we also want to look forward to the next 60 years, so this article tries to predict what the future holds in power electronics. Read More...

Peak current mode CCM DC-DC modeling design considerations

This article discusses, step by step, the average small signal modeling of widely-used peak current mode continuous current mode DC-DC converters. Read More...

>> SEE ALL

New UPS efficiency standards proposed for U.S.

Are uninterruptible power supplies about to become more energy efficient in the U.S.? Read More...

"Digital" sundial: ancient clock gets clever upgrade

Even this oldest of time-indicating instruments can be upgraded to "digital," but in a very non-obvious, non-electronic way. Read More...

The homes of EDN

Take a tour of EDN's office locations through the years, including the home of the print collection. Read More...

1950s vintage Design Ideas

EDN started publishing in 1956, and the Design Ideas section was there from the beginning. But … with a twist. Read More...

Electric plane design offers insight into design constraints

An aircraft with electric motors offers insight into design constraints but also invites new options. Read More...

Pot cores are not perfect

As good as these pot core transformers may be, the unwary can be surprised. Read More...

MAX232: The classic IC lives on since 1988

Maxim Integrated introduced the MAX232, a single 5V powered RS-232 line driver and receiver in 1988 and it's still used in new designs today. Read More...

Why have an internal cal lab?

Internal calibration labs can save money and you can get better service, but there is a significant up-front cost. Read More...

The Moto 360: Premature obsolescence out of design necessity?

Smart watch batteries can’t be user-replaceable without impacting their water resistance, size, and weight, which causes premature obsolescence when battery life issues occur. Read More...

Will tying tuition payments to graduate earnings discourage STEM?

Tying tuition repayment to income of graduates may be a good idea, but it may also be another case of taking advantage of engineers/scientists and their hard course of study. Read More...

Interleaved LED drive can diminish EMI

LED displays often operate with current pulses delivered to the individual devices at some particular duty cycle. In this case, six LEDs were being pulsed in that fashion. Read More...

Battery chargers to become more efficient by 2018

Early this month, the U.S. Department of Energy published a final rulemaking describing the country’s first energy conservation standards for battery chargers. Read More...

Monkey business takes out a power grid

Power companies can be required to install blocking devices to protect large transformers and generators against EMP attacks or geomagnetic disturbances, but what about monkeys? Read More...

>> SEE ALL

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