Power Management

Steve Taranovich
Editor/Tech Writer
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.

Fixed-ratio DC/DC controller has no need for any magnetics

Linear Technology created the LTC7820 high power, fixed ratio charge pump, DC/DC controller that eliminates the need for any magnetic component in a non-isolated intermediate bus converter, based upon the Dickson converter technique. Read More...

What is the Body Control Module in modern automobiles?

The automotive Central Body Control Module (BCM) is a processor-based Power Distribution Center that supervises and controls functions related to the car body such as lights, windows, security, door locks and access control, and various comfort controls. Read More...

Power Tips #78: Synchronous rectifiers improve cross-regulation in flyback power supplies

The flyback is a logical choice when choosing a system topology that must generate multiple outputs from a single power supply. Read More...

Making sense of complex global lithium-ion battery regulations

This article will try to simplify the global world of battery regulations by going over the transportation and safety requirements and trying to simplify the process of determining which ones are necessary for your battery product. Read More...

Bench supplies sense loads, log data

Keysight's E36300 Series of power supplies feature output lists and a datalogger for controlling outputs and storing power measurements. Read More...

Power Tips #77: Designing a CCM flyback converter

This article will provide the power stage design equations for a 53 VDC to 12V at 5A CCM flyback converter. Read More...

PFC totem pole architecture and GaN combine for high power and efficiency

Combining this Bel Power totem pole PFC architecture with Transphorm’s Cascode GaN FET power element is another step toward the exciting future of power electronics. Read More...

Why tiny, ultra-low power comparators are ideal for battery monitoring

Small button- or coin-cell batteries power many of the portable consumer electronics in use today. This article discusses how some simple, low-power monitoring circuits provide efficient monitoring without significantly affecting state-of-charge. Read More...

LTC Design Note: High efficiency, 15V rail-to-rail output synchronous step-down regulator can source or sink 5A

The LTC3623 step-down regulator enables compact POL solutions that can source or sink 5A without significant thermal mitigation. Power capability is easily expanded by paralleling devices. Read More...

Meeting the power demands of battery supplied automotive electronics

Garden variety DC/DC regulators aren’t keeping pace with the evolution of automotive electronics and accessories. Read More...

Power systems for patient-connected equipment

This paper discusses two approaches for power systems within medical equipment for patient-connected applications. Read More...

What is a BMS anyway?

If you have worked with battery systems, you have most likely heard of a battery management system. The term refers to a wide variety of electronic devices that monitor and protect the battery. Read More...

How 5G is changing data centers

While there is perhaps a general perception to the contrary, 5G systems are no longer just the subject of research within major telecoms companies or the topic of conference presentations at industry forums. Read More...

How smart is it to deploy smart meters on the smart grid?

Conventional power grids worldwide are beginning to strain against rising energy needs. How can we improve these systems in a sustainable way? Read More...

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LTC Design Note: High efficiency, 15V rail-to-rail output synchronous step-down regulator can source or sink 5A

The LTC3623 step-down regulator enables compact POL solutions that can source or sink 5A without significant thermal mitigation. Power capability is easily expanded by paralleling devices. Read More...

SEPIC/Ćuk converter sprouts second output

Here are the devilish details for creating a two-output SEPIC-Ćuk converter. Read More...

LTC Design Note: 560V Input, no-opto isolated flyback converter

This switcher operates at a wide input voltage range of 18V to 560V, delivering up to 15W of isolated output power. It requires no opto-coupler, and includes rich features such as low ripple burst mode operation, soft-start, programmable current limit, undervoltage lockout, temperature compensation, and low quiescent current. Read More...

LTC Design Note: Bidirectional DC/DC regulator and supercapacitor charger

Combine a supercapacitor charge controller with a robust DC-DC to make a wide input-range supply with transient ride-out. Read More...

Protect your boost converter

This Design Idea addresses boost converters’ inherent short-circuit vulnerability while also providing reverse-polarity protection. Read More...

Body diodes simplify UPS & energy recovery circuits

This circuit sketch shows how to turn body-diode lemons into lemonade. 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: 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...

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...

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...

AC power measurement uses PWM & PAM

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

>> SEE ALL

Fixed-ratio DC/DC controller has no need for any magnetics

Linear Technology created the LTC7820 high power, fixed ratio charge pump, DC/DC controller that eliminates the need for any magnetic component in a non-isolated intermediate bus converter, based upon the Dickson converter technique. Read More...

Regulator accepts 3 V to 42 V inputs

Employing a synchronous rectification topology, the LT8606 step-down regulator from Linear Technology achieves 92% efficiency. Read More...

Low-power supplies need little board room

PSK series AC/DC power supplies from CUI come in compact encapsulated packages for ITE, industrial, and consumer electronics applications. Read More...

Buck controller handles up to 150 V

Working with a 4 V to 140 V input, the LTC7801 controller from Linear Technology eliminates the need for external surge suppression devices. Read More...

LED controller assists auto lighting

A synchronous buck LED controller, Maxim’s MAX20078 provides fast response time and low EMI for automotive exterior lighting. Read More...

High-current regulator accepts 48 V input

The latest addition to Vicor’s Cool-Power ZVS buck regulator portfolio, the PI3526-00-LGIZ supplies up to 18 A of output current. Read More...

48-V supply handles three-phase input

Joining TDK-Lambda’s TPS power supply series is a 3200 W unit that accepts a three-phase Delta or Wye input ranging from 350 VAC to 528 VAC. Read More...

Switch driver offers 100% duty cycle

The LTC7000/-1 high-side N-channel MOSFET driver from Linear Technology contains an internal charge pump for 100% duty cycle operation. Read More...

POL converters output up to 170 A

Nonisolated DC/DC converters in the DLynx II family from GE offer digital compensation to accommodate a wide range of operating conditions. Read More...

Bench supplies sense loads, log data

Keysight's E36300 Series of power supplies feature output lists and a datalogger for controlling outputs and storing power measurements. Read More...

Industrial converters have 4:1 input range

Two series of DC/DC converters from Polytron Devices, the QB100 and QB150 deliver 100 W and 150 W of output power, respectively. Read More...

CUI introduces aluminum heat sinks

Complementing CUI’s portfolio of thermal-management devices is an extensive lineup of heat sinks in standard form factors and sizes. Read More...

USB power switch affords fast role swap

Diodes’ DPS1133 single-channel power switch meets the protection and FRS (fast role swap) requirements of USB Type-C ports. Read More...

Buck controller operates at up to 2.25 MHz

Linear Technology's LTC7800 step-down DC/DC controller offers selectable switching frequency and a wide input voltage range of 4 V to 60 V. Read More...

Artesyn expands railway converter line

Seventy-two models join Artesyn’s ERM family of DC/DC converter modules offering 10 W and 20 W of output power encapsulated in metal cases. Read More...

Drum core inductors boast low DCR

Comprising over two dozen models, Premier Magnetics’ PM-R family of drum core inductors offers inductance values from 100 µH to 10,000 µH. 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

What is the Body Control Module in modern automobiles?

The automotive Central Body Control Module (BCM) is a processor-based Power Distribution Center that supervises and controls functions related to the car body such as lights, windows, security, door locks and access control, and various comfort controls. Read More...

Making sense of complex global lithium-ion battery regulations

This article will try to simplify the global world of battery regulations by going over the transportation and safety requirements and trying to simplify the process of determining which ones are necessary for your battery product. Read More...

PFC totem pole architecture and GaN combine for high power and efficiency

Combining this Bel Power totem pole PFC architecture with Transphorm’s Cascode GaN FET power element is another step toward the exciting future of power electronics. Read More...

Why tiny, ultra-low power comparators are ideal for battery monitoring

Small button- or coin-cell batteries power many of the portable consumer electronics in use today. This article discusses how some simple, low-power monitoring circuits provide efficient monitoring without significantly affecting state-of-charge. Read More...

Meeting the power demands of battery supplied automotive electronics

Garden variety DC/DC regulators aren’t keeping pace with the evolution of automotive electronics and accessories. Read More...

Power systems for patient-connected equipment

This paper discusses two approaches for power systems within medical equipment for patient-connected applications. Read More...

What is a BMS anyway?

If you have worked with battery systems, you have most likely heard of a battery management system. The term refers to a wide variety of electronic devices that monitor and protect the battery. Read More...

How smart is it to deploy smart meters on the smart grid?

Conventional power grids worldwide are beginning to strain against rising energy needs. How can we improve these systems in a sustainable way? Read More...

Power driver design handles difficult loads, helps characterize PSUs

Dynamically testing and characterizing power supply subsystems can be tricky. This well-behaved driver circuit will simplify the task. Read More...

Product how-to: Novel technology to accurately gauge battery state-of-charge

This article examines how fuel gauging technology has evolved such that now technology exists that provides an accurate reading of battery state-of-charge without requiring characterization. Read More...

>> SEE ALL

Power Tips #78: Synchronous rectifiers improve cross-regulation in flyback power supplies

The flyback is a logical choice when choosing a system topology that must generate multiple outputs from a single power supply. Read More...

Power Tips #77: Designing a CCM flyback converter

This article will provide the power stage design equations for a 53 VDC to 12V at 5A CCM flyback converter. Read More...

How 5G is changing data centers

While there is perhaps a general perception to the contrary, 5G systems are no longer just the subject of research within major telecoms companies or the topic of conference presentations at industry forums. Read More...

Cheap FET driver? Buyers, beware!

What could possibly go wrong using FETs arranged in an H-bridge to control a motorized hospital bed? Turns out, a lot. Read More...

Power Tips #76: Flyback converter design considerations

Flyback converters can appear intimidating and the design choices are many, especially for those who have not designed one before. Let’s look at some key design considerations. Read More...

Neutral woes

More AC line troubles and dangerous peaks, this time due to the 240V neutral. Read More...

Merging power and data: good, bad, or both?

Putting significant power onto an interconnect system originally intended for data is doable but brings both technical challenges and limitations which may be too difficult to overcome. Read More...

Power Tips #75: USB Power Delivery for automotive systems

With USB Power Delivery, devices can negotiate for more power, enabling features that were previously not possible. Read More...

TI’s ‘Power Tips’ series is alive and well on EDN

EDN’s Power Management Design Center will continue the tradition of the ‘Power Tips” blog from Texas Instruments. Read More...

I Sing the Capacitor Electric

Most of us with a decent knowledge of components know that ceramic capacitors can sing, or, act as mechanical-to-voltage converters. But metalized film? Read More...

Der alte battery

What are the chances of a battery getting really old and thus achieving the status of "der alte battery"? Read More...

New LED lamp performance specs for California

Light bulb manufacturers who want their LED products to qualify for “Golden State” rebates will now have to meet new efficacy and performance requirements. Read More...

DC Transformer? Forward converter? Isolation amp? You decide!

Do you think this reader-submitted circuit is a revolutionary DC transformer, or just a slightly different viewing angle onto pre-existing concepts? Read More...

>> SEE ALL

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