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Interrupt controller for DSP-based control of multi-rail DC-DC converters with non-integer switching frequency ratio
Mooney, James; Effler, Simon; Halton, Mark; Mahdi, Abdulhussain E.
This paper proposes a hardware modification to a standard Digital Signal Processor (DSP) that enables it to digitally control multiple DC-DC converters with non-integer switching frequency ratios. The modified DSP overcomes the drawbacks of conventional DSPs, which are attributable to large variations in the delay from when the Analog to Digital Converter (ADC) samples the output voltage to when the duty cycle is updated. By incorporating modified interrupt control logic in the DSP, the effects of a variable delay are minimized by significantly reducing the worst case sampling to duty-cycle-updating delay. Applying this DSP to a multi-rail power supply system provides the designer with the flexibility to choose arbitrary switching frequencies for individual power converters, thereby allowing optimization of the efficiency and performance of the individual converters. ACCEPTED peer-reviewed
Keyword(s): interrupt controller; multi-rail DC-DC converters; digital control; digital signal processor; digital signal processing chips
Publication Date:
2010
Type: Conference item
Peer-Reviewed: Yes
Language(s): English
Institution: University of Limerick
Citation(s): Electronics, Circuits, and Systems (ICECS); pp.1204-1207
http://dx.doi.org/10.1109/ICECS.2010.5724734
Publisher(s): IEEE Computer Society
First Indexed: 2017-10-20 06:36:36 Last Updated: 2018-07-29 06:39:12