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 occur o...
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Main Authors | , |
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Format | Patent |
Language | English |
Published |
01.05.2014
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Subjects | |
Online Access | Get full text |
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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. |
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Bibliography: | Application Number: US201314067733 |