ESC 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.

Switched-capacitor AC-DC/DC-DC converters boost efficiency in power supplies

In the power electronics industry, companies celebrate when gaining a fraction of a percent efficiency in their product. In today’s energy market, efficiency is the “Holy Grail” of specifications. Read More...

Bias power made easy

High-voltage IC technology simplifies AC/DC bias supply designs. Read More...

How to get higher efficiency at lower loads: A new LLC platform makes it possible

A new platform for power supplies helps designers meet regulatory requirements while also saving on the bill of materials Read More...

Why the Infineon and IR combination will benefit the Power Electronics industry

I recently had the pleasure of meeting some key members of the Infineon Power team from Munich at APEC in Charlotte, NC. Read More...

Modeling and Loop Compensation Design of Switching Mode Power Supplies, Part 2

We continue with Part 2 of this topic on modeling and loop compensation design of switching mode power supplies. Read More...

Up Against The (Power) Wall: Power Management And The Path To Exascale Computing

Exascale computing? It's the next big goal in supercomputer performance – and power management is one of the main obstacles to getting there. Read More...

APEC 2015 Slideshow: Day two of open exhibits

Day two on the Exhibit floor at APEC 2015 Read More...

APEC 2015 Slideshow: Day one of open exhibits

The trends this year are very evident for GaN and Digital Power enhancements and solution growth. Read More...

WPT breaks all connections, Part 2

Wireless power transfer (WPT) has been the subject of intense interest, bordering on folklore, for over a century. The arrival of the modern cell phone with its innumerable “apps” and rising battery consumption, has recently sparked off a huge upsurge in consumer demand for wireless chargers. Read More...

Real-time power GaN waveform monitoring

In this article, we compare the degradation mechanisms of GaN FETs with silicon FETs and discuss the need for waveform monitoring. Read More...

Modeling and Loop Compensation Design of Switching Mode Power Supplies, Part 1

This application note explains the basic concepts and methods of small signal modeling of switching mode power supplies and their loop compensation design. The buck step-down converter is used as the typical example, but the concepts can be applied to other topologies. A user-friendly LTpowerCADTM design tool is also introduced to ease the design and optimization. Read More...

Avago Tech Note: Smart gate-drive optocoupler with integrated flyback controller

A smart gate-drive optocoupler for FETs & IGBTs is ideal for distributed power supplies, power inverters, motor drives, and more. Read More...

The Integration of Power and Speed: Monolithic eGaN half bridge and driver in one package

GaN is a fast growing market with new applications emerging as power density and speeds increase, thermal management techniques improve, footprint shrinks and integration advances. For the first time in the industry Texas Instruments introduces, the LMG5200, a fully integrated 80V, 10A enhancement-mode GaN FET (eGaN) half-bridge power stage in a 6mm x 8mm QFN package that requires no underfill. Read More...

Can you use supercaps to power electric vehicles?

The high energy density of supercapacitors makes them seem like a good fit for EVs compared to batteries, and one such suggestion was awarded an honorable mention—but is it really technically viable, or even a good idea? Read More...

>> SEE ALL

LTC Design Note: Inverting DC/DC controller converts a positive input to a negative output with a single inductor

Generate negative voltages to -150V from a positive input. Read More...

MOSFET-based Joule Thief steps up voltage

This Design Idea illustrates a novel approach to the Joule Thief circuit. Read More...

Simple SSR has zero-cross on/off switching

This AC solid-state relay enables zero-cross switching with quite a simple design. Read More...

Transient load gives power systems a workout

Verify power supply performance with this transient load generator. Read More...

Series-connected MOSFETs increase voltage & power handling

A constant-current charger for a high-energy capacitor bank uses multiple MOSFETs to increase voltage and power-handling capabilities. Read More...

Sleep easy with this desk fan speed reducer

This innovative AC motor control skips cycles. Read More...

LTC Design Note: Versatile industrial power supply takes high voltage input and yields from eight 1A to two 4A outputs

This ultra-flexible, highly-featured switching regulator IC might be perfect for your next complex and/or industrial design. Read More...

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...

>> SEE ALL

Step-down driver furnishes up to 40 A of LED current

The LT3744 synchronous step-down DC/DC converter from Linear Technology delivers constant current to drive high-current LEDs, while its 3.3-V to 36-V input voltage range accommodates a wide variety of applications, including industrial, DLP (digital light processing) projection, and architectural lighting. Read More...

Micro PMIC squeezes into wearable devices

A multiple-rail PMIC (power-management IC) complete with battery-charging circuitry, the AS3701 from ams comes in a tiny chip-scale package that is just 2x2x0.4 mm for use in products that operate from a single lithium-ion cell, such as smart watches, sports bands, wearable medical devices, handheld GPS units, and mobile phones. Read More...

500-W converters tolerate extreme environments

Packaged in watertight IP66-rated enclosures with sealed circular connectors, DC/DC converters in the HVI 500-D3G series from Absopulse are immune to the effects of rain, humidity, sand, dust, oil, and other contaminants found in harsh industrial, marine, military, and power-generation environments. Read More...

15W TRIAC-dimmable, Energy Star-compliant LED drivers work smoothly with nearly any dimmer

Although Phihong USA's new series of 15W TRIAC-dimmable constant current LED drivers sacrifices some efficiency and power quality performance for the sake of compatibility and cost, the drivers are still worth considering for many applications. Read More...

Buck-boost converter works with dual inputs

A synchronous buck-boost DC/DC converter that accepts 2.2 V to 18 V on each of its two inputs, the LTC3118 from Linear Technology enables high-efficiency operation from either input source to a programmable output voltage above, below, or equal to the inputs. Read More...

Buck regulator offers output tracking and sequencing

Delivering up to 2 A of continuous output current from a 2.7-V to 5.5-V input supply, the ISL8002B synchronous buck regulator from Intersil provides output tracking and sequencing of FPGAs and microprocessors to ensure that sensitive multi-rails properly start up and shut down. Read More...

Boost converter accepts up to 40-V input

Configured for boost, SEPIC, or inverting operation, the LT8570 DC/DC converter from Linear Technology offers an input voltage range of 2.55 V to 40 V, making the device suitable for applications with input sources ranging from a single-cell Li-Ion battery to automotive inputs. Read More...

Controller ensures regulation in automotive start/stop systems

Offering dual buck outputs plus a single boost output, the LTC3899 synchronous DC/DC controller from Linear Technology maintains output voltage regulation over an input supply range of 2.2 V to 60 V for use in automotive and heavy truck start/stop systems. Read More...

42-V step-down regulator cuts quiescent current

With a built-in current-sense amplifier and low quiescent current, the LT8613 synchronous step-down switching regulator from Linear Technology is well-suited for automotive always-on applications that need extended operating battery life. Read More...

Triple-output supplies are just 1.06 in. high

Low-profile 75-W power supplies in TDK-Lambda’s CUT75 series occupy an industry-standard footprint of 3x5 in. to conserve space in industrial, broadcast, and test and measurement applications requiring dual or triple outputs. Read More...

Keysight expands bench DMM line to 7½ digits

The 34470A (7.5 digit) and 34465A (6.5 digit) increase the Truevolt series from two to four models. Read More...

Freescale battery charger for the Portable IoT

Analog dual-path battery charger for wearable and portable Internet of Things (IoT) devices Read More...

20-V LDO regulator boasts high PSRR

Linear Technology’s LT3042 LDO voltage regulator achieves low-frequency PSRR (power supply ripple rejection) performance that exceeds 90 dB out to 10 kHz and high-frequency PSRR that exceeds 75 dB out to 3 MHz, quieting noisy or high-ripple-input supplies. Read More...

PFC boost controller ensures emission compliance

The LT8312 boost controller with active power-factor correction from Linear Technology achieves a power factor of greater than 0.99 by actively modulating the input current, enabling compliance with most harmonic current emission requirements. Read More...

Wide-output converter modules deliver 200 W

Ericsson’s PKB4216C series of DC/DC converters provides up to 200 W of output power and up to 6.67 A of output current, along with an adjustable output voltage of 15 V to 33 V for use in RF power-amplifier applications. Read More...

Small DC/DC converters supply 0.25 to 3 W

XP Power has launched six series of isolated DC/DC converters in surface-mount packages with industry-standard pinouts offering single and dual outputs in power ranges from 0.25 W to 3 W. Read More...

>> SEE ALL

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...

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...

Hybrids mark the end of the stinky city bus

Prying Eyes looks inside a hybrid gas-electric bus powered by 288 ultracapacitors. Read More...

>> SEE ALL

Switched-capacitor AC-DC/DC-DC converters boost efficiency in power supplies

In the power electronics industry, companies celebrate when gaining a fraction of a percent efficiency in their product. In today’s energy market, efficiency is the “Holy Grail” of specifications. Read More...

Bias power made easy

High-voltage IC technology simplifies AC/DC bias supply designs. Read More...

How to get higher efficiency at lower loads: A new LLC platform makes it possible

A new platform for power supplies helps designers meet regulatory requirements while also saving on the bill of materials Read More...

Can all the wireless charging standards coexist?

When it comes to wireless charging, the question for many developers is whether or not the various standards like Qi and A4WP can coexist, and how to design for that. Read More...

Why the Infineon and IR combination will benefit the Power Electronics industry

I recently had the pleasure of meeting some key members of the Infineon Power team from Munich at APEC in Charlotte, NC. Read More...

Modeling and Loop Compensation Design of Switching Mode Power Supplies, Part 2

We continue with Part 2 of this topic on modeling and loop compensation design of switching mode power supplies. Read More...

Up Against The (Power) Wall: Power Management And The Path To Exascale Computing

Exascale computing? It's the next big goal in supercomputer performance – and power management is one of the main obstacles to getting there. Read More...

APEC 2015 Slideshow: Day two of open exhibits

Day two on the Exhibit floor at APEC 2015 Read More...

Testing the iCub robot’s battery with an oscilloscope

The iCub humanoid robot’s new battery backpack was tested and optimized using a Tektronix oscilloscope and power probes to keep the sensors on, the circuits powered up, and motors turning. Read More...

APEC 2015 Slideshow: Day one of open exhibits

The trends this year are very evident for GaN and Digital Power enhancements and solution growth. Read More...

>> SEE ALL

Can you use supercaps to power electric vehicles?

The high energy density of supercapacitors makes them seem like a good fit for EVs compared to batteries, and one such suggestion was awarded an honorable mention—but is it really technically viable, or even a good idea? Read More...

Tougher Light Bulb Efficiency/Performance Requirements for the U.S.?

The future could get brighter using less power for U.S. consumers if the Department of Energy (DOE) decides to pass tougher General Service Lamp (GSL) standards. Read More...

Linduino Power System Management (PSM)

While many engineers use a dongle and tools to configure Power System Management devices via PMBus, a growing number of designs are adding Board Management Controllers, or connecting their PMBus to an existing microcontroller or application processor. Read More...

Ensuring power efficiency in variable-frequency A/C systems

Active power factor correction can ensure that more of the power delivered to a home is used productively. Read More...

Farewell, Leonard Nimoy

EDN bids farewell to the actor who inspired many to become engineers and scientists. Read More...

It's time to SPICE up your life!

Earlier this year, I decided to get hot and spicy and compare the performance of three graphical SPICE circuit simulators to develop stable voltage regulators for space electronics. Read More...

Where is GaN going?

Alex Lidow looks at the current applications for GaN, the ones on the near horizon, and industry analyst predictions. Read More...

The inductive nature of voltage-control loops

The inductance of a voltage regulator depends on its load current. The math proves it. Read More...

Power electronics rise at DesignCon

What’s so special about DesignCon? With a 20-year history behind it, DesignCon is a conference that inspires fierce loyalty and commitment from its attendees and speakers. Here are some reflections on DesignCon 2015 from Steve Sandler, an engineer focused on power electronics. Read More...

Don’t neglect the humble battery connector

We pay considerable attention to batteries and their technologies, but the lowly connector is just as important to a successful, reliable DC supply. Read More...

Tips to optimize high-speed serial design

Papers and presentations at DesignCon 2015 address critical areas of high-speed design. Here’s a preview of some of them. Read More...

High tech EV shows the future of electronics in automobiles

Renovo has a very high tech EV that will make a significant contribution to electronics in automobiles going forward. Read More...

Impedance measurements make a difference at DesignCon

What do clock jitter, EMI, control loop stability, SPICE modeling, rogue waves and the ripeness of fruit have in common? A tutorial and paper presentation at DesignCon may be just what you need to find out. Read More...

>> SEE ALL

FEATURED RESOURCES