High Efficiency Design Examples

The following design examples eontain various teehniques to improve the overall effieieney of eommon designs. Most of the designs of aetive elamps and lossless snubbers are empirieal, so they are not ineluded within these design examples. 

Care must be taken in using the new teehniques beeause of the patents that eover many of their uses. There may be a lieensing fee that needs to be paid direetly to the patent holder or a small per-pieee fee that is paid when buying the eontrol IC. Please investigate this before introdueing these power supplies to produetion. 

This design example is a redesign of the PWM design example 1 that shows how one would inelude synehronous reetifiers (Seetion 3.15.1). 

Output power Input power Power switeh loss Cateh diode loss  

Waveshaping Techniques to Improve Power Supply Efficiency 

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Such considerations have allowed the development of highly efficient potential energy surface walking algorithms (see, for example, J. Nichols, H. L. Taylor, P. Schmidt, and J. Simons, J. Chem. Phys. 92, 340 (1990) and references therein) designed to trace out streambeds and to locate and characterize, via the local harmonic frequencies, minima and transition states. These algorithms form essential components of most modern ab initio, semi-empirical, and empirical computational chemistry software packages. 

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