Analog Supply or Digital Supply?

Published:2010/7/28 2:23:00 Author:Michelle From:SeekIC

In recent years, the micro processor controlled switch power supply has made great strides forward. However, there are still hot debates on the advantages and the disadvantages of the analog or the digital power supply. In fact, the two supplies have their own features and defects. Designers must make sensible choices based on a good command of these two power supplies.

The analog switch has been used for years and its way of design has been well known. Besides, some books related to it have been already published and also some concerning simulation software and proseminar. Meanwhile, there are many suppliers offer a huge number of integrated circuits of low cost which including functions of current induction and protection. In a word, the view that the digital supply will make the analog one superabundant can not stand for long.

Digital control has some features that analog one do not have, which makes the special type has a few functions that have not been realized so far. So wether put the digital supply into use is decided by wether its advantages overcome its disadvantages or not.

A priority that has been mentioned a lot is its permission of removing some of the passive components in the controller, thus prevents the component from aging. Moreover, this advantage has the greater value and more profound significance, for example, functions of phase compensation and surplus setting can be achieved through the privilege that the digital controller can collect the control functions into one component.

Above all, the two types will keep abreast for a long time and will be together ’peacefully’. The two styles will play their important roles respectively. Fortunately, designers would be able to select the best method to the current application based on the promotion of the optimized micro controller controlled by the digital supply and some new tools and trainings related. Related chip is:M87C51 .

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