Maximising AC/DC efficiency from full-load to no-load

Hot Articles

HomeCap: Residential power factor correction^PDF!
José Alexandre Fell provides some details in this PQS application note series about the HomeCap residential PFC and describes the pilot project performed by Edelnor....

Maximising AC/DC efficiency from full-load to no-load^PDF!
While maximising power efficiency at full-load is a top priority in the design of an AC/DC supply, standby power considerations and new power-efficiency standards loom larger...

Industrial


	Improving COT regulators with flywheel current injection The constant on-time (COT) regulator is a modified version of the typical hysteretic converter, where a typical hysteretic converter turns on the main switch for a fixed interval of time whenever the output... Explaining redundant power techniques for servers Redundant power is a critical component in server applications. In the simplest solution, two power supplies can drive a load through diodes to OR their outputs together... How to size ultracapacitors Electrochemical capacitors comprise a wide class of electrical energy storage components in which the symmetrical carbon-carbon cell is the most notable and is now commonly referred to as an ultracapacitor...
Green Tech


	Self-powered systems eliminate the need for batteries Energy harvesting or EH, sometimes referred to as energy scavenging, has gained attention as a means to lessen or eliminate the need for battery power.... Stacking up new energy storage options Fuel cells power up future demands in energy consumption and storage View the PDF document for more information... Converters with an active front end (AFE) In contrast to conventional converters, AFE converters use semiconductor switches (such as...
Power Conversion/Management


	How PMBus offers open-standard digital power management Until now, there has been no industry-wide consensus on digital power management...
	Boost battery performance with active charge-balancing The automotive system engineering group of Infineon Technologies AG was assigned the task of developing an E-Cart. The drivable vehicle was to be used to demonstrate the electrical...
	USB bus-powered devices put an end to wall warts Every system that supplies power must incorporate some kind of power limits. Definitely, we don't want our PC monitors to go black once a mouse is plugged in. However...
Portable Power


	Extracting efficiency in mobiles and portable stereo audio Portable electronic products, such as mobile phones, are integrating more and more multimedia capabilities...
	OVP devices make your portables safer Portable electronic devices use internal batteries that need to be charged from an external power supply, most usually an AC/DC wall adapter....
	Extending battery life and solving RF power amps problems The shrinking size of portable devices is at odds with the capability to supply longer-lasting batteries...
Power Test


	Electronic rheostat provides decades of load resistance Power resistors, rheostats (variable resistors), and other electrical loads are useful for testing power supplies and regulators...
	Multiplier circuit gauges real power in high-frequency PWMs The article discusses the step-by-step procedure on how a power circuit design measures dissipated load power in an H-bridge PWM motor driver...
	Determine resistors' performances in surge/overload conditions Electrical surges are a common failure mode for many types of resistors in a variety of harsh environments, including power supply, automotive and industrial applications...
Supplies & Accessories


	Underutilized SEPIC outperforms the flyback topology This article provides a comparison of a SEPIC and flyback power supply with identical requirements. Component stresses for each approach and example ...
	Emulated ripple technique advances hysteretic switchmode supplies The circuitry for hysteretic control in traditional switchmode power supplies is relatively simple and doesn't require compensation for stability...
	Need to estimate buck converter efficiency in portable apps? Efficiency prediction for a buck converter at Pulse Width Modulation (PWM) mode is well analysed. However, not enough attention has been paid to predict efficiency at Pulse Frequency Modulation (PFM) mode...

Editor's Note

VivekNanda Channels feed design minds, fuel growth
In the light of limited education resources, India needs to refocus efforts on areas of anticipated growth...
By Vivek Nanda

Tech Talk

World's largest solar farm planned in India

A solar power project costing Rs.21,000 crore is being planned for Gujarat...
>>discuss

Is India set to become the 'China' of PV manufacturing?
The solar tech explosion seems to be leading the country to its biggest EMS boom yet...
>>discuss

High Quality Articles

A behind the screen look at TV technology^new!
Whether HDTV continues on the path we see before us today, or jumps off onto a path where the new solution requires you to project a three-dimensional...

Redundant power techniques for servers
Redundant power is a critical component in server applications. In the simplest solution, two power supplies can drive a load through diodes to OR their outputs together...

Improve COT regulators with flywheel current injection
The constant on-time (COT) regulator is a modified version of the typical hysteretic converter, where a typical hysteretic converter turns ...

Extracting efficiency in mobiles, portable audio
Portable electronic products, such as mobile phones, are integrating more and more multimedia capabilities...

EMC tests, PCB guidelines for automotive linear regulators
EMC is important for the functionality and security of electronic devices. Today's designers must deal with steadily increasing system frequencies...

read more...

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Jul 16-31 Issue

	Top Story: Board design becomes a nimble giant ndian companies are well recognised for their technical competency, strong domain knowledge, cost advantage and large technical talent pool... read on