Digital controller for switch-mode DC-DC converters and method

A fully digital synthesizable digital controller (152, 152a) controls a switch-mode DC-DC converter (150, 230, 240, 250, 260) having switching elements (154) and an LC circuit (156, 157) for producing an output voltage (160) that is maintained at a desired level regardless of load changes that can o...

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Bibliographic Details
Main Authors ZOSO LUCIANO, CHIN ALLAN P
Format Patent
LanguageEnglish
Published 08.03.2016
Subjects
APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS
CONTROL OR REGULATION THEREOF
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
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Summary:A fully digital synthesizable digital controller (152, 152a) controls a switch-mode DC-DC converter (150, 230, 240, 250, 260) having switching elements (154) and an LC circuit (156, 157) for producing an output voltage (160) that is maintained at a desired level regardless of load changes that can occur on the output. The digital controller (152, 152a) comprises an input stage (164), proportional-integral-derivative (PID) compensator (170), and a digital sigma-delta modulator (172). The input stage (164) produces a difference signal between a reference voltage Vref and a feedback voltage Vfbk, and comprises (i) first and second delta-sigma-delta modulators (178, 180) and a subtractor (182), (ii) a delta-sigma-delta modulator (180) and a subtractor (182); or (iii) a comparator (218). The PID compensator (170) processes the difference signal to compensate for an undesired phase shift and to stabilize the feedback loop. The digital sigma-delta modulator (172) generates a switching element control signal for controlling at least one of the switching elements.
Bibliography:Application Number: US201314067733