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Power/Alternative Energy  

Current-sharing issues in multi-phase regulators

Posted: 02 Jan 2009     Print Version  Bookmark and Share

Keywords:load transients  switching regulators  PWM 

During high-frequency load transients, conventional multi-phase switching regulators experience large beat-frequency oscillations of its phase currents. These beat-frequency components most often result in additional electrical and thermal stresses on power devices. We can reduce these stresses, achieve current balancing for any load frequencies higher or lower than the switching frequency and cut EMI by applying transient frequency modulation (TFM)�which uses a PWM modulator, frequency modulator, and load-transient detector�in place of the standard PWM modulator circuitry. This article discusses how it works to improve your design.

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