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.

Kit enables sub-3W wireless charging

IDT's Qi devkit & design enables low-power applications. 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...

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...

POL regulator input filter design considerations

The design of the input capacitor is critical for proper operation of POL regulators and also to minimize noise emissions. What design considerations should be evaluated for a well-designed POL regulator input filter? 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...

Linduino for power system management

This article will present the Linduino libraries, power system management programming, setup and use of Linduino PSM with demo circuits, and PSM debugging techniques. 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...

Energy efficiency is key to cloud services for the Internet of Everything

Embracing traditional data services and the burgeoning requirements of the IoT, the Internet of Everything is adding considerably to the pressure being applied to data communication networks and the storage capabilities of data centers. Read More...

Teardown: 12V AC adapters – The Horror

A dark side of Chinese manufacturing is uncovered in this teardown of really bad power supplies. Read More...

UVP protects rechargeable batteries

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

Wake up primary-side regulated flyback

Speed up the transient response for PSR flyback converters with this technique. Read More...

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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...

LTC Design Note: Dual 13A μModule regulator with digital interface for remote monitoring & control of power

Digital power system management (PSM) enables on-demand telemetry capability to set, monitor, change, and log power parameters of dual high-current parallelable regulators. Read More...

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All-SiC power module teams with gate driver

Wolfspeed’s half-bridge 1200-V power module, the CAS325M12HM2 achieves high efficiency and power density for high-current power electronics. Read More...

1200-V IGBTs minimize switching loss

ON Semconductor’s NGTB40N120FL3WG, NGTB25N120FL3WG, and NGTB40N120L3WG IGBTs have a highly activated field-stop layer and co-packaged diode. Read More...

TI claims highest power density 12-V, 10-A, 10-MHz DC/DC converter

Ultra-small SWIFT step-down converter features unique topology to quadruple current density Read More...

Rectifier reference design reduces heat

Linear Technology’s DC2465 evaluation board demonstrates a low-loss, three-phase, ideal diode bridge rectifier that eases thermal design. Read More...

20-A models join DC converter lineup

Part of TDK-Lambda’s i6A family of DC/DC converters, the 20-A i6A4W step-down units operate over an even wider input range of 9 V to 53 V. Read More...

Gate drivers deliver up to 8 A

Scale-iDriver galvanically isolated single-channel gate-driver ICs from Power Integrations provide 2.5 A to 8 A without an external booster. Read More...

Converter optimizes light-load efficiency

Offered in industrial and automotive grades, the LM5165 buck converter from Texas Instruments requires just 10.4 µA of quiescent current. Read More...

DIN supplies deliver up to 96 W

Operating from an input of 88 VAC to 264 VAC, the ADNB series of power supplies from Artesyn offers power ratings of 40 W, 60 W, and 96 W. Read More...

600-V IGBTs reduce switching loss

Trenchstop Performance IGBTs from Infineon bring high efficiency to 30-kHz hard-switching power-conversion applications. Read More...

TI’s 600-V integrated GaN FET and driver power stage

I have been waiting for “the other shoe to drop” regarding GaN power element evolution and so here it is. Read More...

Buck converters accept up to 18-V input

Aimed at industrial equipment and large household appliances, the XC9263 and XC9264 series of step-down converters from Torex furnish 500 mA. Read More...

Dual regulator occupies small footprint

A step-down regulator from Linear Technology, the LTM4642 supplies two 4-A outputs that can be current-shared as a single 8-A output. Read More...

300-W converters are railway-ready

DC/DC converters in the BHT-31R-F4 series from Absopulse achieve an operational life of 30 years at high temperatures. Read More...

Buck regulator accepts 3.0-V to 42-V input

Based on a synchronous rectification topology, the LT8608 step-down regulator from Linear Technology achieves 93% efficiency at 2 MHz. Read More...

Converter eases USB Type-C designs

Portable devices can easily evolve to USB Type-C with PD (Power Delivery) using the MAX77596 synchronous buck converter from Maxim. Read More...

Surge stopper protects always-on electronics

The LTC4380 surge stopper from Linear Technology provides overvoltage and overcurrent protection for always-on 4-V to 72-V systems. Read More...

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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...

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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...

POL regulator input filter design considerations

The design of the input capacitor is critical for proper operation of POL regulators and also to minimize noise emissions. What design considerations should be evaluated for a well-designed POL regulator input filter? Read More...

Linduino for power system management

This article will present the Linduino libraries, power system management programming, setup and use of Linduino PSM with demo circuits, and PSM debugging techniques. Read More...

Energy efficiency is key to cloud services for the Internet of Everything

Embracing traditional data services and the burgeoning requirements of the IoT, the Internet of Everything is adding considerably to the pressure being applied to data communication networks and the storage capabilities of data centers. Read More...

Wake up primary-side regulated flyback

Speed up the transient response for PSR flyback converters with this technique. Read More...

How to design better, more efficient lighting systems

There’s more than one way to build a lighting system, and good design leads directly to better power efficiency and a lower bill of materials cost. Read More...

Powering a precision SAR ADC with an efficient, ultra-low power switcher

This article discusses a means of achieving a higher efficiency power solution for your precision SAR ADC by using an ultra-low power switching regulator in a hysteretic mode and analyzing the performance trade-offs. Read More...

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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...

My kingdom for a 12V adapter

Why can't I find any decent power adapters for my LED lighting strips? Read More...

Analyze current with a dedicated instrument

Keysight's CX3300 lets you view current waveforms from 150 pA to 10 A, with oscilloscope-like features. Read More...

When what’s old is new again, with a twist

Sometimes re-invented versions of classic products can offer fun, features, and insight into what made a classic what it became. Read More...

De-icing concrete may prove useful for improving road safety

A new type of concrete able to conduct electricity just enough to melt snow and ice shows potential for roadway applications. Read More...

An ESA power system for ion propulsion engines in space

A neat design for power management using a 14 kW solar array for ion propulsion engines was developed for BepiColombo, an ESA mission to explore Mercury. Read More...

Decoupling for rocket scientists, part 1

Did you know that in some instances you can remove many of the decoupling capacitors on your PCB without impacting the performance or the reliability of your sub-system? Read More...

Solar explosion leads to blackout, March 10, 1989

On this day in tech history, an explosion on the sun sent a storm cloud toward Earth that would cause blackouts and power problems in North America. Read More...

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