Design Con 2015

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.

10 More tricks to extend oscilloscope usefulness

Make yourself look like the company's oscilloscope expert with these ten handy tips and tricks. Read More...

My long-running affection for heat sinks

As a bulk-metal component, the heat sink is the opposite of the million-gate, submicron-process IC or a power-handling discrete device; despite this obvious difference, it is often critical to the viability and long life of those more glamorous active components. Read More...

LXI + PoE: Essential Design Considerations

This paper introduces the basic concepts of LXI (LAN eXtensions for Instrumentation) and PoE (Power over Ethernet), and studies the four key considerations for hardware realization to achieve LXI compliance for a device powered over Ethernet. The LAN PHY compliance test is also discussed. Read More...

EDN Hot 100 products of 2014: Power & Optoelectronics/Lighting Control

This section of EDN's Hot 100 Products of 2014 includes power-related devices and ICs, as well as LEDs and optoelectronic/lighting control devices. Read More...

Understanding isolated DC/DC converter voltage regulation

Isolated DC/DC converters are required in a broad range of applications including power metering, industrial programmable logic controllers (PLCs), insulated-gate bipolar transistor (IGBT) driver power supplies, industrial fieldbus, and industrial automation. Read More...

Triple output lab power supply offers paralleling & tracking

This 315W power supply power supply has three outputs, each with multiple ranges. Each output can provide 0 V to 35 V at 0 to 3 A. Read More...

How to measure the world's fastest power switch

GaN transistors are incredibly fast, but we don't know how fast because of our test equipment and circuit limitations. Read More...

Power Integrations FluxLink feedback brings increased performance gains to off-line flyback switchers

Power Integrations has developed a magnetic coupling method called FluxLink safety-isolated communication technology in its InnoSwitch, an off-line flyback CV/CC switcher IC with Integrated MOSFET, Synchronous-Rectification and Feedback. Read More...

Littlefuse announces circuit-protection at Electronica

The company is also announcing LED circuit protection, reed-sensing devices, and thyristors. Read More...

Triac triggering compliance: The basics of positive and negative supplies

Voltage supplies are sometimes qualified as positive or negative. A “negative supply” may sound strange to someone unused to dealing with Triacs, as certainly no Integrated Circuit in the world is working with a negative voltage. A negative output is sometimes preferred for driving Triacs. Simple solutions may be implemented for Triac driving from a positive output, as explained here. Read More...

Telecom/Datacom 48V: Have no fear; 400V is here

Telecom companies take heart. The 400V DC ecosystem is a proven and supported technology which is especially evident as demonstrated leading power experts Read More...

Keithley SMU gets capacitive touchscreen

The Model 2460 source-measure unit is yet another instrument moving to the familiar touch screen user interface. Read More...

PDN design essentials for wideband low impedance

The essential steps to design board-level power distribution networks (PDNs) with wideband low impedance are discussed. The key steps include placement and routing for optimal PDN characteristics, post-layout simulation that computes the PDN impedance, and impedance measurement of the prototype PCB. Read More...

MOSFETs automatically balance supercapacitor cells

Intended for high-voltage commercial applications, Advanced Linear Devices’ family of Supercapacitor Auto Balancing (SAB) MOSFET arrays regulates and balances leakage current for each cell used in a series stack of two or more for systems between 5 V and 400 V. Read More...

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Flyback switcher works down to 1.1V, flashes HBLEDs

Check out this DI if you need voltage step-up from a single cell. Read More...

Load switch with self-resetting circuit breaker

Protect both load and driver with this elegant little Design Idea. Read More...

LTC Design Note: High performance single phase DC/DC controller with power system management

This DC-DC controller incorporates power system management and high-precision data converters. Read More...

Improve efficiency of low-cost switcher

Reduce losses by over 30%, and improve Vin(min) too, on a 34063-based or similar switcher. Read More...

Variable HV power supply employs photovoltaic optocoupler

This unusual topology saved the day when a higher-voltage variable supply was needed. Read More...

Low-side switch with fast turn-off for inductive loads

Ditch the freewheeling diode if you want fast turn off. Read More...

Avago Tech Note: Driving & protecting inverter IGBTs

A special purpose optocoupler can solve your IGBT gate-drive and fault-feedback needs. Read More...

Avago Tech Note: Reduce IGBT drive cost and space

Use an application-specific optocoupler for an elegant solution to IGBT drive and monitoring. Read More...

LTC Design Note: 65V 500mA step-down converter fits automotive and industrial applications

This switcher is happy to drop a 60V input all the way down to 0.8V. Read More...

Avoid problems with multiple DC-DC converters

Improve DC-DC converter design and application, and avoid potential problems with this synchronization circuit. Read More...

LTC Design Notes: Micropower Isolated Flyback Converter with Input Voltage Range from 6V to 100V

A tiny, integrated flyback converter requires minimal support components. Read More...

Smart ripple canceller offers near-zero dropout

Eliminate linear power supply ripple losslessly! Read More...

Design Notes: 60V, Synchronous Step-Down High Current LED Driver

Highly efficient high-power LED controller/driver also facilitates MPPT. Read More...

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Buck converters enable smart power regulation

Synchronous buck converters from Diodes Inc., the AP65450, AP65452, and AP65552 employ adaptive constant on-time control to ensure high DC output accuracy, high efficiency, and fast transient response for low-voltage power regulation in digital TV, monitor, and other high-density, fast-changing point-of-load system architectures. Read More...

EDN Hot 100 products of 2014: Power & Optoelectronics/Lighting Control

This section of EDN's Hot 100 Products of 2014 includes power-related devices and ICs, as well as LEDs and optoelectronic/lighting control devices. Read More...

Tiny boost regulators deliver up to 10 W

Offered with fixed output voltages of 4.75 V, 5.0 V, 5.25 V, and 5.5 V or an adjustable output voltage, the MIC2875 and MIC2876 2-MHz boost regulators from Micrel are capable of supplying up to 2 A of output current, while occupying just 122 square mm of board space. Read More...

Triple output lab power supply offers paralleling & tracking

This 315W power supply power supply has three outputs, each with multiple ranges. Each output can provide 0 V to 35 V at 0 to 3 A. Read More...

Power Integrations FluxLink feedback brings increased performance gains to off-line flyback switchers

Power Integrations has developed a magnetic coupling method called FluxLink safety-isolated communication technology in its InnoSwitch, an off-line flyback CV/CC switcher IC with Integrated MOSFET, Synchronous-Rectification and Feedback. Read More...

Micro DC/DC converters fit wearable devices

With a 6-MHz power switch embedded in its miniature PCB, the TDK EPCOS B30000P80 ultra-compact DC/DC converter module saves up to 35% of space compared to conventional discrete solutions for use in wearable devices and cameras, as well as WLAN, GPS, and Bluetooth applications. Read More...

Power-supply IC drives automotive MCUs

Optimized for microcontrollers in a variety of automotive systems, Rohm Semiconductor’s BD39001EKV-C power-management device employs a buck-boost switching method that ensures stable operation, even during cranking, and improves power-conversion efficiency by up to 5% compared to conventional products. Read More...

Littlefuse announces circuit-protection at Electronica

The company is also announcing LED circuit protection, reed-sensing devices, and thyristors. Read More...

Keithley SMU gets capacitive touchscreen

The Model 2460 source-measure unit is yet another instrument moving to the familiar touch screen user interface. Read More...

Telecom brick converters supply up to 75 W

Comprising fully regulated 75-W DC/DC converters in eighth-brick packages, the AVO75 series from Artesyn Embedded Technologies brings high efficiency and thermal performance to cost-sensitive, space-constrained telecom network infrastructure applications. Read More...

IGBTs target high-power industrial applications

International Rectifier has rolled out an extensive line of IGBT modules comprising 72devices in half-bridge, low-side chopper, high-side chopper, single switch, 6-pack, 6-pack (3-phase inverter), and H bridge configurations for use in motor drive inverters, switch-mode power supplies, uninterruptible power supplies, solar inverters, and welding. Read More...

MOSFETs automatically balance supercapacitor cells

Intended for high-voltage commercial applications, Advanced Linear Devices’ family of Supercapacitor Auto Balancing (SAB) MOSFET arrays regulates and balances leakage current for each cell used in a series stack of two or more for systems between 5 V and 400 V. Read More...

Monitor IC optimizes board energy consumption

A four-channel PMBus digital power-system manager IC, the LTC2975 from Linear Technology, performs current, power, and energy monitoring of the intermediate-bus input to point-of-load (POL) converters. Read More...

Power op amp handles voltage levels up to 2500 V

Apex Microtechnology has expanded its portfolio of high-voltage operational amplifiers with the PA99, an off-the-shelf, single-package 2500-V power amp that addresses the demand for high-voltage operation required by power-supply and test-equipment manufacturers. Read More...

Linear Technology 2A buck converter is 93% efficient at 2MHz

With many switching buck regulators on the market today that are capable of improving an automotive system design it is hard to choose the optimum one for your design. Read More...

Apps help identify mobile code 'energy hotspots'

A software startup company based on a Purdue University innovation is helping to extend the life of smartphone batteries by helping application developers identify code that drains batteries quickly. Read More...

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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...

Way, way off the grid: Powering the Phoenix Mars lander

Prying Eyes: An inside look at the power-generation, -regulation, and -delivery system for the Phoenix Mars lander. Read More...

Microfuel cell enables ubiquitous computing

Prying Eyes examines a fuel-cell-based power pack for handheld devices, such as cell phones and MP3 players. Read More...

>> SEE ALL

LXI + PoE: Essential Design Considerations

This paper introduces the basic concepts of LXI (LAN eXtensions for Instrumentation) and PoE (Power over Ethernet), and studies the four key considerations for hardware realization to achieve LXI compliance for a device powered over Ethernet. The LAN PHY compliance test is also discussed. Read More...

Understanding isolated DC/DC converter voltage regulation

Isolated DC/DC converters are required in a broad range of applications including power metering, industrial programmable logic controllers (PLCs), insulated-gate bipolar transistor (IGBT) driver power supplies, industrial fieldbus, and industrial automation. Read More...

How to measure the world's fastest power switch

GaN transistors are incredibly fast, but we don't know how fast because of our test equipment and circuit limitations. Read More...

Triac triggering compliance: The basics of positive and negative supplies

Voltage supplies are sometimes qualified as positive or negative. A “negative supply” may sound strange to someone unused to dealing with Triacs, as certainly no Integrated Circuit in the world is working with a negative voltage. A negative output is sometimes preferred for driving Triacs. Simple solutions may be implemented for Triac driving from a positive output, as explained here. Read More...

Telecom/Datacom 48V: Have no fear; 400V is here

Telecom companies take heart. The 400V DC ecosystem is a proven and supported technology which is especially evident as demonstrated leading power experts Read More...

Designing building & installing a homemade 12VDC LED lighting system

With the arrival of the LED lighting revolution and efficient DC-DC converters, an engineer revisits his cabin’s battery-powered lighting system. Read More...

USB battery charging rev. 1.2: Important role of charger detectors

The USB port is an excellent example of a versatile standard. Read More...

AC/DC power supply performance and international efficiency standards

With the increasing restrictiveness of international power supply efficiency standards, power supply controllers are being pushed to their cost-performance limits. Read More...

Book Review: Power Integrity

In some cultures like those in China and the near Himalayas, dragons are considered amulets to attract good luck. Author Steve Sandler surreptitiously includes a dragon figure at the beginning pages of this book, however, luck will not be needed since Sandler’s technical skills and his ability to communicate them will certainly make this book a success with electronics designers. Read More...

Power module redundancy

The power module is an integral part of the µTCA system. Read More...

>> SEE ALL

My long-running affection for heat sinks

As a bulk-metal component, the heat sink is the opposite of the million-gate, submicron-process IC or a power-handling discrete device; despite this obvious difference, it is often critical to the viability and long life of those more glamorous active components. Read More...

Digital Power chat session on Planet Analog November 19, 2014

Power management is a vital part to every design. Having the best power supply for your system ensures a robust design as well as a design that will perform at its highest levels. Read More...

California shines a light on LED lamp efficiency opportunities

Efficiency opportunities and proposing regulations for small diameter directional lamps and general service LED lamps. Read More...

Architects of Modern Power (AMP) consortium issues first standards

I introduced the AMP consortium in my previous blog and right on the heels of that news comes their first standards for digital point-of-load (POL) and advanced bus dc-dc converters with the goal of common mechanical and electrical specifications for the development of advanced power conversion technology for distributed power systems. Read More...

Testing times for design engineers

Characterising subsystems containing high-power devices switching at megahertz/gigahertz frequencies with very fast edges is stretching the capabilities of measurement equipment, and we all have to become test engineers to understand what's inside the box, the sources of errors, and how to use DSOs, VNAs, TDRs and spectrum analysers properly. Read More...

Well marked yet mysterious coin cell teaches a small lesson

Sometimes what you think will be an easy problem to solve, especially with the power of Internet search, turns out to lead to a dead end; the constant lesson and reminder is "don't assume anything." Read More...

Making things perfectly clear

The U.S. Department of Energy (DOE) recently distributed a Notice of Proposed Rulemaking (NOPR) for Test Procedures for External Power Supplies (EPSs). Read More...

Cree recent surge of SiC Power MOSFETs intros will help Power designers

I have noticed a recent surge of activity by Cree with their SiC line of power MOSFETs over the last two months as well as a new family of 50V GaN HEMT die. Read More...

Simpler superconducting promised by nanowire device

MIT researchers have developed a new circuit design that could make simple superconducting devices much cheaper to manufacture. Read More...

DesignCon Awards nominations open

DesignCon’s Best in Design & Test Awards and the DesignCon Engineer of the Year Award recognize the best of the best in engineering and new product advancements at the chip, board, or system level, with a special emphasis on signal integrity and power integrity. Read More...

Three digital power-houses create a new consortium

The founding members of AMP ---CUI, Ericsson Power Modules and Murata -- have formalized a cooperation that has been in place for some time between these power giants. Read More...

Guard-bands reduce MOSFET failures in space, part 2

Plots show how radiation affects ON resistance. Part 2 provides test code for selecting the proper guard band. Read More...

Guard-bands reduce MOSFET failures in space, part 1

MOSFETs that go into spacecraft power modules to drive motors need to functions properly after exposure to radiation. Part 1 explains shy guard bands are needed for dice testing. Read More...

>> SEE ALL

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