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Error amplifier limitations in high-performance regulator applications 6/24/2009

As power supply switching frequencies increase, higher loop crossover frequencies are necessary to keep pace with the escalating load transient slew rate demands, and to reduce the number and size of filter components. For voltage-mode-controlled supplies, the voltage loop error amplifier must work harder to provide its compensating gain loop contribution.

Characterize optocouplers in the feedback loop of high-frequency power converters 6/19/2009

Optocouplers will add a phase shift that can make your power supply unstable. Here is how you can measure and compensate the loop.

Electronic ballast circuits enhance resonant-mode power supplies 5/15/2009

This article explains the basic functionality of a typical electronic ballast circuit, highlights the similarities between the two applications, and describes a typical resonant-mode power-supply solution using a standard electronic ballast control IC. Experimental results are also shown to verify final performance and functionality.

LED lighting: panel debates quality versus cost 5/8/2009

LED lighting can be great—but LEDs won’t make a replacement for screw-in light bulbs any time soon.

Use alternative approaches to evaluate dc/dc synchronous buck converters 4/23/2009

Linear systems, online tools, and full simulations help you analyze your designs.

Managing high-voltage lithium-ion batteries in HEVs 4/9/2009

Skyrocketing energy prices and the growing concern over carbon emissions have focused attention on electric and hybrid-electric vehicles. New lithium-battery designs will be key technologies for efficient EVs and HEVs.

Tamper-resistant smart power meters rely on isolated sensors 3/19/2009

Utilities are pushing to replace old electromechanical meters with microcontroller-based smart meters that, in addition to their intelligence and communication ability, are also tamper-proof. There is also a growing market for individual small power meters and an emerging market for metering at the server, or individual-appliance-network, level.

Reversal of fortune 2/19/2009

Tales From The Cube: Synchronous-FET rectifiers teach one designer a lesson about dc/dc converters and current flow.

The direction of light 2/5/2009

Residential and commercial lighting currently accounts for 20% of the electricity used in the United States. Although CFLs are the best options for increasing efficiency and decreasing power needs, HB-LED technology is also making advances. Both technologies have drawbacks, however, and stand to benefit from improvements in electronics, manufacturing, and thermal management.

Lithium-ion battery charger provides USB OTG capability 1/22/2009

With users demanding communication among their mobile devices, supporting the power needs of USB OTG (On-The-Go) becomes a requirement. Optimize your battery chargers for a current-limited source, such as USB, and for supporting USB OTG specifications.

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