True Bridgeless PFC Converter Achieves Over 98% Efficiency, 0.999 Power Factor

A bridgeless PFC converter (patents pending) based on novel hybrid-switching method eliminates the full-bridge rectifier altogether...

Optimizing Adapter Power Supply Design

Power supplies in electronic products now present a number of new challenges...

How To Control and Reap the Benefits of HID Lamps Frequencies

Electronic HID (high intensity discharge lamp) ballasts: how they work, how to control them, and develop an electronic ballast solution for outdoor lighting application...

Selecting Filter Capacitors forThree Phase Bridge Rectifiers

The parameter M, which is a function of the filter capacitor and line power, determines the quantitative relationship between total harmonic distortion (THD) and circuit characteristics for a three-phase bridge rectifier...

One Powerful Decade: Keep Core Geometry in Mind When Designing Transformers

One Powerful Decade: Core geometry affects transformer performance, so the designer must be aware of the characteristics of the typical types: E cores, round center leg E cores, toroids and pot cores....

One Powerful Decade Update: Inductors Provide Important Functions in Power Electronic Systems

Used in applications ranging from RF to power supply filters, inductors are magnetic elements with resistance and capacitance parasitics...

Power Module and Double Layer Capacitor Harvest Energy from Radio Signals

RF energy harvesting must work over a wide range of operating conditions, including variations of input power and output load resistance. An RF-to-dc power module combines with a double layer capacitor to meet these energy harvesting requirements...

Turning Power Conversion Technology "Green"

DR. SLOBODAN CUK has devoted many hours to seeking improvements to dc-dc and ac-dc power conversion. Starting with this issue of Power Electronics Technology,...

The Electrical Safety Foundation International Applauds Ground-breaking Legislation

THE ELECTRICAL SAFETY FOUNDATION INTERNATIONAL (ESFI) applauds the introduction of the Federal Buildings Personnel Training Act of 2010 (HR 5112) in the...

New NanoMarkets report, Electromagnetic Compatibility (EMC) Materials and Components

MARKETS AND OPPORTUNITIES Item Number: Nano-181 analyzes and quantifies the markets for EMC materials including coatings and paints, bulk materials including...

PATENTS

METHOD AND APPARATUS FOR CONSTANT ON-TIME SWITCH MODE CONVERTERS Issued May 11, 2010 United States Patent 7,714,547 The teachings presented herein provide...

NEW products

Automotive Qualified Power SO-8 MOSFETs in LFPAK NXP SEMICONDUCTORS has launched a full range of automotive power MOSFETs housed in the compact, thermally...