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

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

Intelligent power switches for 48V battery applications

In this application note we demonstrate a way to design circuits able to drive all kinds of loads with components already in mass production, and that offer functionalities similar to those of the 12 or 24V IPS available today. Read More...

Power management lab kit series bridges theory and application

Texas Instruments has now bridged the gap between power theory and real-world applications for engineering students and industry professionals with the TI Power Management Lab Kit (TI-PMLK) series. Read More...

Apple MacBook gets a new battery

Replacing a laptop's built-in battery often isn't hard, and can tangibly extend its usable life, just make sure you've got decent tools and instructions on your hands. Read More...

The Tesla Model S, ultracapacitors, and large energy storage

Imagine EVs becoming veritable power sources through banks of power inverters in a blacked-out region, providing emergency power to hospitals, businesses, and homes until utility crews could restore power. Read More...

EPA rolls out EV charger efficiency specification draft

The EPA has published a first draft program specification focused on improving energy efficiency in Level 1 and Level 2 Electric Vehicle Service Equipment. 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...

Single-channel power supply monitor with remote temperature sense, Part 2

In an application that only has one power supply, the unused set of DAC and ADC pins on a power supply manager IC can be used to sense remote temperature. Part 2 of this series addresses transistor properties, quantization, and detecting circuit failures. Read More...

Reliability and MTBF: We think we know what we mean, but do we?

A brief refresher about the basics of reliability would seem to be in order. Read More...

Workshop shows off test and measurement equipment

The Keysight Technologies TestDrive workshop shows you how to get measurements such as power integrity, power consumption, and RF spectrum, but has less hands-on time than last year. Read More...

Single-channel power supply monitor with remote temperature sense, Part 1

In an application that only has one power supply, the unused set of DAC and ADC pins on a power supply manager IC can be used to sense remote temperature. 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...

Enabling robust data communications within a high voltage BMS

Achieving reliability, performance, and longevity of battery packs is the primary purpose of the BMS (battery management system). Read More...

NI introduces PXIe 7.5-digit DMM

The NI PXIe-4081 brings the accuracy of its PXI predecessor to PXI Express. Read More...

>> SEE ALL

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...

LTC Design Note: Dual-phase buck controller drives high density 1.2V/60A supply with sub-milliohm DCR sensing

Low output voltages and use of DrMOS integrated FETs+drivers are hallmarks of this switcher design. Read More...

AC power measurement uses PWM & PAM

Use clever pulse modulation techniques to multiply signals and measure power. Read More...

LTC Design Note: 10A μModule step-down regulator with advanced input and load protection

This switcher design has comprehensive electrical and thermal protection, and high efficiency over wide input-output ranges. Read More...

LTC Design Note: Monolithic no-opto isolated flyback converter provides versatile solution

This versatile chip handles flyback, buck, boost, and negative input, and features low standby current and up to 18W output. Read More...

>> SEE ALL

Buck regulator is at home in noisy environments

The LTM8053 µModule step-down regulator from Linear Technology safely operates from unregulated or fluctuating 12-V to 36-V input supplies. Read More...

Single-output power supplies deliver 65 W

AC/DC supplies in the ALM65 series from XP Power meet U.S. Level VI efficiency standards, as well as international medical safety standards. Read More...

Step-down converter handles 40 A

Texas Instruments’ TPS548D22 40-A, 16-VIN synchronous buck DC/DC converter provides true differential remote-voltage sensing. Read More...

Thermally efficient buck regulator works at 175°C

A 42-V input-capable synchronous step-down switching regulator, the LT8610AX from Linear Technology achieves efficiency of over 90%. Read More...

Converters power automotive IoT designs

ENA100 100-W and ENA200 200-W DC/DC converters from Powerbox are housed in IP21-rated enclosures built for tough automotive applications. Read More...

Power management lab kit series bridges theory and application

Texas Instruments has now bridged the gap between power theory and real-world applications for engineering students and industry professionals with the TI Power Management Lab Kit (TI-PMLK) series. Read More...

Inverting controller accepts wide-ranging input

Using a single inductor, the LTC3896 DC/DC controller from Linear Technology converts a positive input voltage to a regulated negative output. Read More...

Fuel-gauge ICs help prevent battery clones

Maxim’s family of ModelGauge m5 standalone fuel gauges provides SHA-256 authentication combined with a 160-bit secret key. Read More...

Vicor’s innovative packaging for next-generation DC-DC brick power modules

New packaging technology excels when smaller size and lower profile join efficiency as critical "must have" attributes. Read More...

Portable e-car charger leverages SiC MOSFETs

Thirty-two SiC MOSFETs from STMicroelectronics perform efficient power conversion in the ZapCharger portable electric-car charging station. Read More...

Step-down controller handles 150 V

The LTC3895 step-down switching-regulator controller from Linear Technology drives an all N-channel synchronous power MOSFET stage. Read More...

Server power supply delivers 1600 W

Intended for hyperscale data centers, the HS-OCS power supply from Artesyn furnishes 1600 W of power with up to 94% peak efficiency. Read More...

Power converters achieve 2-MOPP rating

Offering single, dual, and triple outputs, Polytron’s MHIA series of AC/DC converters meets IEC 60601-1 3rd edition medical safety standards. Read More...

Efficient step-down modules deliver up to 5 A

Two single-channel DC/DC power modules, the ISL8205M and ISL8202M from Intersil, achieve up to 95% efficiency in a 4.5×7.5×1.85-mm package. Read More...

Flyback regulator eases converter design

A 100-V monolithic flyback regulator from Linear Technology, the LT8304 requires no optoisolator or third winding for regulation. Read More...

DMOS IC drives two stepper motors

Each full-bridge output of Allegro’s A5988 quad driver IC is rated at up to 1.6 A and 40 V for driving two stepper motors or four DC motors. 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

Intelligent power switches for 48V battery applications

In this application note we demonstrate a way to design circuits able to drive all kinds of loads with components already in mass production, and that offer functionalities similar to those of the 12 or 24V IPS available today. Read More...

The Tesla Model S, ultracapacitors, and large energy storage

Imagine EVs becoming veritable power sources through banks of power inverters in a blacked-out region, providing emergency power to hospitals, businesses, and homes until utility crews could restore power. Read More...

Single-channel power supply monitor with remote temperature sense, Part 2

In an application that only has one power supply, the unused set of DAC and ADC pins on a power supply manager IC can be used to sense remote temperature. Part 2 of this series addresses transistor properties, quantization, and detecting circuit failures. Read More...

Reliability and MTBF: We think we know what we mean, but do we?

A brief refresher about the basics of reliability would seem to be in order. Read More...

Single-channel power supply monitor with remote temperature sense, Part 1

In an application that only has one power supply, the unused set of DAC and ADC pins on a power supply manager IC can be used to sense remote temperature. Read More...

Enabling robust data communications within a high voltage BMS

Achieving reliability, performance, and longevity of battery packs is the primary purpose of the BMS (battery management system). Read More...

Getting smarter about power conversion and its management

Power management is a well-known and understood aspect of product development, but just as with everything else in the electronics industry, it must evolve with new demands for efficiency. Read More...

Hints and tips on the use of cooling fans for power supplies

Heat is the number one cause of unreliability or reduced lifetime within an electronic system due to the life time of electrolytic capacitors being strongly linked to their operating case temperature. Read More...

A MOSFET’s behavior on a phase-shifted ZVS full bridge DC/DC converter

The aim of this article is to investigate the potential electrical stress on MOSFET devices when they are used as switches on a zero voltage switching converter. Read More...

Loop tuning controls transient response in point of load power modules

To restore responsiveness when adding load capacitance to POL power modules, re-tune the control loop. Read More...

>> SEE ALL

Interleaved LED drive

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...

EPA rolls out EV charger efficiency specification draft

The EPA has published a first draft program specification focused on improving energy efficiency in Level 1 and Level 2 Electric Vehicle Service Equipment. Read More...

Workshop shows off test and measurement equipment

The Keysight Technologies TestDrive workshop shows you how to get measurements such as power integrity, power consumption, and RF spectrum, but has less hands-on time than last year. Read More...

NI introduces PXIe 7.5-digit DMM

The NI PXIe-4081 brings the accuracy of its PXI predecessor to PXI Express. Read More...

Paralleling supplies: good, bad, or ugly?

If you need more current than a single supply can provide, using several in parallel is an easy solution in some cases – but definitely not in others. Read More...

GaN RF power transistors: Not just power, but speed to L-Band and beyond

GaN power transistors have been quickly gaining momentum in the power and high frequency application space and not just overtaking Silicon in power and RF, but also GaAs in the microwave arena. Read More...

APEC 2016 – Plenty of hardware, but where was the software?

APEC continues to be heavily hardware focused, with the majority of developers trying to “build a better mousetrap” by battling the physics of power conversion to attack specific problems. What largely seems to be missing is the software to aid the physics and enhance complete power supply ecosystems. Read More...

Sensing current on the high side

Here are some ways to sense current in a supply rail, which requires care to do right. Read More...

EDN turns 60, help us celebrate

EDN began life as Electrical Design News on May 8, 1956. Here's what to expect over the coming months as we celebrate the publication. Read More...

Why corona-free custom magnetics solutions are needed

VoltBoss corona-free transformers eliminate corona failure for voltages up to 4.5 kV on a 1 sq. in. footprint. Why is this important? Read More...

Megavolt/kiloamp tests reveal extreme engineering challenges

The world of extremely high voltages and current is not a linear extension of the lower-level regime, but instead requires a radically different way of thinking, working, and testing. Read More...

>> SEE ALL

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