New Products
May 1, 2006
PWM Controller The IR3624 from International Rectifier is a 600-kHz single-phase synchronous buck PWM controller IC designed for high-density, 10-A nonisolated...
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...
Power Semiconductors Take the Floor at APEC
Feb 1, 2006
At the upcoming Applied Power Electronics Conference and Exposition (APEC), which will be held March 19-23 in Dallas, several power semiconductor vendors...
New Products: January 2006
Jan 1, 2006
This issue of Power Electronics Technology features new fan speed controllers, stepdown controllers, power supply kits, automotive-qualified switches, and more...
PWM: From a Single Chip To a Giant Industry
Oct 1, 2005
A pulse-width modulation control chip invented
in 1975 spurred the development of switching
power supplies, leading to a power control IC
industry that today is measured in billions of
dollars....
Improving the Performance of Flyback Power Supplies
Sep 1, 2005
Innovative MOSFETs and flyback controllers help designers meet challenging efficiency
and power density requirements, while also
satisfying demands for reliability and low cost....
Converter Synchronization Provides Design Flexibility
Nov 1, 2004
Designs often require synchronization of two power converters within the same piece of equipment. Doing this fixes the noise at a particular frequency...
Overpower Compensation for Current-Mode Supplies
Sep 1, 2004
A current-mode power supply works by observing the peak current circulating in an inductance. By adjusting the peak current setpoint at which the power...
Reducing Wasted Startup Current in Offline Supplies
Aug 1, 2004
A switch-mode power supply (SMPS) offers a convenient and efficient way to reduce a large input voltage (the ac mains voltage) to power lower-voltage...
Active Clamp Transformer Reset: High or Low Side?
Jul 1, 2004
The active clamp transformer reset technique offers many well-documented advantages over traditional single-ended reset techniques, including lower voltage...
Managing Currents in Dual- Synchronous Controllers
Mar 1, 2004
When a dual-synchronous controller has no load, negative inductor currents may develop. If these currents are not properly managed, they can flow backward...
Current-Doubler Rectifier Reduces Ripple Current
Mar 1, 2004
The current-doubler rectifier is a popular alternative for the output stage of a buck-derived power converter, which would otherwise use a conventional...
Gate-Voltage Control Minimizes EMI from IGBTs
Feb 1, 2004
The power converter has high-voltage and high-current switching waveforms that generate electromagnetic interference (EMI) in the form of both conducted...
