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|Title: ||Multiphase Optimal Response Mixed-signal Current Program Mode Controller|
|Authors: ||Alico, Jurgen|
|Advisor: ||Prodic, Aleksandar|
|Department: ||Electrical and Computer Engineering|
|Keywords: ||power converters|
current program mode
multiphase switch mode power supplies
|Issue Date: ||14-Dec-2009|
|Abstract: ||The primary focus of this thesis is to present a simple and practical implementation of an optimal-time response controller for multiphase interleaved dc-dc SMPS. This novel solution enables equal current sharing between phases not only in steady-state, but also during load transients, as well as bump-less transition between those two states. A digital voltage loop and multiple analog peak current programmed mode current loops are combined to implement a capacitor charge balance control algorithm with fairly simple hardware. This algorithm provides recovery from a disturbance in a single on-off switching action, which is performed in virtually the fastest possible time.
The hybrid interface between the loops is provided through a structure combining a sample-and-hold circuit and a relatively slow successive-approximation DAC that provides control signals for all the loops in the system. Furthermore, for operation under light load conditions, the controller automatically switches into simply implemented pulse-frequency mode of operation.|
|Appears in Collections:||Master|
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