Power Converter Synthesis Part 3: Near Zero Emissions
May 1, 2003
Part 1 and 2 of this series describe synthesis methods that achieve improved EMC properties for nonisolated converters. In this part, let's apply similar synthesis methods to isolated full- and half-bridge circuits....
Moving Forward Converters to Higher Efficiency
May 1, 2003
Resonant reset techniques combined with synchronous rectification in forward converters is delivering simplicity, cost effectiveness, and high efficiency, benefiting designers today....
Flyback Design for Continuous Mode of Operation
May 1, 2003
A look at the design of a continuous mode flyback transformer - presenting one more example of the function of an air gap in a ferrite core....
Multi-Chambered Planar Magnetics Blends Inductors and Transformers
Apr 1, 2003
New planar construction alternatives for blending various power magnetic components of switchmode power processing circuits and systems are based on the use of core designs with multiple winding areas and core sections, providing common flux paths for transformer and inductor operations....
Ultra-Fast Simulation Expedites Accurate SMPS Design
Mar 1, 2003
A designer can put together a complete design before ordering the parts needed to build a prototype by using merely a desktop computer and some innovative SPICE software....
Modular Megawatt Control
Jan 1, 2003
The modular system of power conversion components employs a flexible design concept that consists of OEM components for thermal management, electrical, and mechanical interconnection and interfaces between power unit and control....
Determine Free-Running Frequency of QR Systems
Oct 1, 2002
By nature, a quasi-resonant supply exhibits a highly variable switching frequency that depends on the input/output operating conditions. Here, we will evaluate the switching frequency at a given operating point and give the designer the necessary insight to dimension his system....
The Incredible Shrinking Power Supply: New IC Cuts AC Adapter Size
Sep 1, 2002
A new IC allows a switching topology that rivals the simplicity and low cost of linear adapters, enabling a smaller, lighter package of up to 75% efficiency with 3W output and <300mW at no load....
Filter Components Cut Emissions and Output Noise
Sep 1, 2002
A new power supply design uses a combination of chassis capacitors, non-inductive snubber resistors and an inductor to achieve 500mVp-p and 35 dB reductions in output noise and radiated emissions, respectively....
Compact 48kW Converter Powers X-Ray Machine
Jun 1, 2002
IGBT power modules integrate drivers, isolation, and ZVS logic circuits to lower switching losses, output regulation, and ripple....
FRA Measures Closed-Loop Response
May 1, 2002
Injecting a signal from a frequency response analyzer determines the gain and phase margin of a switching power supply....
Optimize Compensation with ZCS Gain/Phase Prediction
Apr 1, 2002
Analytical approach demonstrates how the open-loop gain and phase prediction can determine the optimal compensation network for a zero current switched (ZCS) dc-dc, variable frequency forward converter....
