Eliminate the Guesswork in Controlling EMI
Jan 1, 2008
A well-defined procedure for predicting EMI in ac-dc power-supply designs and bringing it within regulatory limits saves time and effort versus the trial-and-error methods that designers may be using....
xDSL Pushes DC-DC Converters to Higher Frequencies
Oct 1, 2006
The throughput or user bit rate for xDSL is highly dependent on the receiver's signal-to-interference ratio (SIR). There are many sources of interference...
Controller Generates Multi- and Single-Phase Outputs
Aug 1, 2006
The TPS40140 synchronous, PWM controller from Texas Instruments operates as a standalone device that generates two outputs, or as a two-channel, multiphase controller....
Opportunities Await Medical Power Supplies
Aug 1, 2006
Medical product design and manufacturing is not for the weak of heart. But despite the hurdles, several power-supply merchants are addressing medical applications. For these companies, the efforts required to design, build and qualify products may be justified by a modest but steadily growing marketplace....
Shrinking Inductors Help Build Smaller Power Converters
Aug 1, 2006
A major reason for the migration to higher switching frequencies has been the need to reduce the size of the inductor required to complete a dc-dc converter design....
Modified Sine-Wave Inverter Enhanced
Aug 1, 2006
Altering the waveform produced by a modified sine-wave inverter reduces distortion products, while still permitting use of efficient switching techniques....
New Products
Jun 1, 2006
Web-Based Simulator Microchip Technology's Mindi is a web-based simulation tool that aids in the design of several circuits useful for power-management...
Notebook Adapters Face Efficiency Challenge
Apr 1, 2006
When the considerations of end users, OEMs and power-supply vendors converge on the design of notebook adapters, the resulting solutions benefit each group....
Low-Cost Microcontroller Dithers Switching Frequency
Mar 1, 2006
Because of the high level of output power that switching power-supply designs have, systems designers are challenged to develop designs that meet consumer...
Converters Address Medical Equipment Compliance
Mar 1, 2006
Several methods exist for providing adequate electrical isolation in equipment to be connected to a medical patient. One approach involves the use of...
Semiconductor Vendors Turn to Modules
Mar 1, 2006
In the next few years, semiconductor suppliers will play a more pivotal role in the future of power. This role definition is driven by a number of factors....
Power Supply Redesign Raises EMC Issues
Sep 1, 2005
Because even modest design changes can cause a supply to fail FCC/CE tests for conducted and radiated noise, designers need to understand
where noise originates and how to reduce it to acceptable levels....
Circuit Analysis Accounts For Magnetic Fields
Nov 1, 2004
Ohm's law and Kirchhoff's voltage law (KVL) provide powerful tools for conventional circuit analysis (mesh analysis), but if time-varying magnetic fields...
Power Transformer Attenuates Harmonics
Oct 1, 2004
The mains of the world were constructed as a giant copper causeway to transport electricity from the generating station to our homes and factories. Today's...
