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.

Wearables enhance the human condition with efficient, low power conversion ICs

No longer just a device you’d only see in a cool science fiction movie, wearable devices are here to stay. Read More...

EDN Must Reads: Smart Power

Get smart — take control of your power. EDN Power Must Reads gives electronics engineers the latest thinking on power management and power components design. Read More...

LTC Design Note: Electrolytic capacitor-based data backup power solution for a 12V system with 5V to 36V input

This module provides hold-up power in e.g., embedded systems, and can also be combined with a buck-boost module for a robust power system suitable for automotive and other harsh environments. Read More...

Utilizing GaN transistors in 48V communications DC-DC converter design

This article compares the efficiency of GaN to that of the latest generation MOSFETs with design details and test results. Read More...

Wireless battery management systems highlight drive for higher reliability

Wireless battery management systems promise to improve safety and reliability of the full battery system. Read More...

Improper power sequencing in op amps: Analyzing the risks

In systems with multiple supply voltages, operational amplifier power supplies must be established simultaneously with, or before, any input signals are applied. If this doesn’t happen, overvoltage and latch-up conditions can occur. Read More...

Capacitor self-diagnostics

Electrolytic capacitors are often a system’s weak link. This Design Idea helps you keep tabs on their condition. Read More...

Digital control enables high reliability DC-DC power conversion with active snubbing

This paper takes a closer look at preventing a voltage excursion with special emphasis on eliminating reverse recovery losses of parasitic diodes in MOSFETs that provide several other added benefits. Read More...

What's wrong with this MacBook Pro battery?

This laptop battery works fine to a point, and then flat-out fails, when disconnected from its AC adapter. Read More...

How to design a flyback converter as a front-end for a two-stage LED driver

A two stage LED driver consists of a PFC flyback converter with constant voltage regulation for the front-end followed by a constant current regulating buck stage. Read More...

8 tips for effective power-integrity probing

Poor PCB layout, inadequate floor-planning, ineffective de-coupling, and weak filtering cause AC noise, interference, and transients on the power rails supplying FPGAs, ADCs, and DACs, affecting their performance. Read More...

Probe, bus decoder add power measurements to oscilloscopes

Teledyne LeCroy has added an active voltage-offset probe to its oscilloscope line for power-rail measurements. Software decoder shows digital power protocol. Read More...

Automotive 4.0: The new revolution?

Bus-fleet modernization can bring advanced power technology to a segment that has historically been slow to adopt new technologies, taking big steps toward Automotive 4.0. Read More...

Improving efficiency and performance in automotive applications through SiC

SiC has attracted attention for its superior performance over silicon and is being adopted in a variety of applications to improve efficiency. Read More...

>> SEE ALL

LTC Design Note: Electrolytic capacitor-based data backup power solution for a 12V system with 5V to 36V input

This module provides hold-up power in e.g., embedded systems, and can also be combined with a buck-boost module for a robust power system suitable for automotive and other harsh environments. Read More...

Capacitor self-diagnostics

Electrolytic capacitors are often a system’s weak link. This Design Idea helps you keep tabs on their condition. Read More...

LTC Design Note: Ultrathin dual 2.5A or single 5A μModule regulator fits on the backside of PCBs, allowing space on the topside for digital ICs

This versatile DC-DC excels where height is limited and multiple ganging options are advantageous. Read More...

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...

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EDN Hot 100 products of 2016: Power

This section of EDN's Hot 100 Products of 2016 includes power-related transistors, converters, regulators, and ICs. Read More...

Mini regulators supply up to 1 A

Point-of-load switching regulators in the MSR7810WUP series from MicroPower Direct are tiny open-board units that offer up to 95% efficiency. Read More...

LED driver handles 100 W

Thomas Research Products’ LED100WPS1-24 constant-voltage driver can be used in both indoor and outdoor commercial and industrial applications. Read More...

Efficient buck-boost converter supplies 5 A

With four internal N-channel MOSFETs, the LTC3119 synchronous DC/DC converter from Linear Technology achieves efficiency of up to 95%. Read More...

Industrial supply accepts three-phase input

Delivering up to 3200 W, TDK-Lambda’s TPS300-24 power supply operates from a three-phase delta or wye input ranging from 350 VAC to 528 VAC. Read More...

OpenVPX supply suits military use

A 3U OpenVPX power supply, Dawn’s six-channel PSC-6238 delivers 800 W of output power in a wedge-lock, conduction-cooled module. Read More...

Buck regulators accept up to 40-V input

A wide input range of 4.5 V to 40 V enables the TS3004x series of switching regulators from Semtech to work in a wide range of applications. Read More...

Dual-output reference drives up to 200 mA

Each output of the LT6658 voltage reference from Linear Technology is configurable for any voltage between 2.5 V and 6 V. Read More...

Artesyn launches digitally controlled converters

The ADO300 eighth-brick and ADQ700 quarter-brick DC/DC converters from Artesyn supply 300 W and 700 W of output power, respectively. Read More...

1500-W supply carries 7-year warranty

TDK-Lambda’s QM7 power supply offers full medical MOPPs isolation and low acoustic noise in a 176×63.3×270-mm (W×H×D) modular package. Read More...

Efficient boost controller takes the heat

Linear Technology has launched a higher-temperature 150°C version of its LTC3786 step-up DC/DC controller that boasts 98% efficiency. Read More...

Switcher IC survives wide supply fluctuations

Aimed at non-isolated offline applications, the LinkSwitch-TN2 switcher IC from Power Integrations packs a rugged 725-V power MOSFET. Read More...

Mini medical converters supply 2 W

Offering a choice of single or dual outputs, the IML02 and ISM02 DC/DC converters from XP Power provide 4000 VAC of reinforced isolation. Read More...

DC fans keep electronics cool

CUI has expanded its thermal-management portfolio with the CFM series of axial DC cooling fans, providing airflow of 10 CFM to over 200 CFM. Read More...

LED driver furnishes up to 40 W

A hysteresis-mode DC/DC step-down converter, the AL8860 from Diodes Inc. drives single or multiple series-connected LEDs. Read More...

Chassis-mount shunt handles up to 350 A

Stackpole Electronics’ HCC8420 high-current shunt resistor furnishes a power rating of 15 W for use in power modules and frequency converters. 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

Wearables enhance the human condition with efficient, low power conversion ICs

No longer just a device you’d only see in a cool science fiction movie, wearable devices are here to stay. Read More...

Utilizing GaN transistors in 48V communications DC-DC converter design

This article compares the efficiency of GaN to that of the latest generation MOSFETs with design details and test results. Read More...

Wireless battery management systems highlight drive for higher reliability

Wireless battery management systems promise to improve safety and reliability of the full battery system. Read More...

Improper power sequencing in op amps: Analyzing the risks

In systems with multiple supply voltages, operational amplifier power supplies must be established simultaneously with, or before, any input signals are applied. If this doesn’t happen, overvoltage and latch-up conditions can occur. Read More...

Digital control enables high reliability DC-DC power conversion with active snubbing

This paper takes a closer look at preventing a voltage excursion with special emphasis on eliminating reverse recovery losses of parasitic diodes in MOSFETs that provide several other added benefits. Read More...

How to design a flyback converter as a front-end for a two-stage LED driver

A two stage LED driver consists of a PFC flyback converter with constant voltage regulation for the front-end followed by a constant current regulating buck stage. Read More...

Automotive 4.0: The new revolution?

Bus-fleet modernization can bring advanced power technology to a segment that has historically been slow to adopt new technologies, taking big steps toward Automotive 4.0. Read More...

Improving efficiency and performance in automotive applications through SiC

SiC has attracted attention for its superior performance over silicon and is being adopted in a variety of applications to improve efficiency. Read More...

High-performance GaN-based 48-V to 1-V conversion for PoL applications

This design of a 48-V to 1-V PoL 50-A converter using a GaN half-bridge module and a high-performance controller for the single-stage topology, can achieve efficiency exceeding 90 percent. Read More...

The latest in electric vehicle power management

The electric vehicle system, composed of an electric motor, power electronics converters, and energy storage devices, is the only readily available alternative to propel motor vehicles. Read More...

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Are we ready for fusion reactors in space?

NASA has been considering fusion power for many years as a readily attainable energy through heating and confinement of a deuterium-tritium plasma until the condition at which the plasma can heat itself. Read More...

What's wrong with this MacBook Pro battery?

This laptop battery works fine to a point, and then flat-out fails, when disconnected from its AC adapter. Read More...

8 tips for effective power-integrity probing

Poor PCB layout, inadequate floor-planning, ineffective de-coupling, and weak filtering cause AC noise, interference, and transients on the power rails supplying FPGAs, ADCs, and DACs, affecting their performance. Read More...

Get ready for even smaller batteries

Button and coin cells are old news as pin cells power the latest tiny consumer products. Read More...

Inspiration from Chinatown

A P.I. trick from a classic movie inspires a cheap battery-monitoring alternative to test a circuit. Read More...

The ever-moving goalposts of efficiency standards for external power supplies

Various authorities have introduced a succession of standards that seek to impose tighter requirements on the efficiency of external power supplies. Read More...

Did power problems help kill the modular smartphone?

Modular, flexible, and expandable sound like great product attributes, but they bring a large list of electrical, power, mechanical, and software headaches to a design. Read More...

Why is everything junk? (Heat-pump edition)

No matter how wonderful today's high-technology products seem to be, they're almost invariably hobbled by design faults. I ponder why that might be, and discuss a specific product. Read More...

Long-living products defy conventional wisdom

Winning products can have viable production lifetimes of decades, despite our "here today, obsolete tomorrow" thinking. Read More...

ON Semi plus Fairchild Semi equals power management squared for designers

The combined resources of these two companies under strong engineering management and marketing direction will enhance their place in the power industry. Read More...

The gap between renewable energy promises and reality

Broad statements about the potential of renewable energy may make you feel good, but the harsh reality is that engineers may be faulted for not delivering on them. 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...

"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...

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