TY - GEN
T1 - Interrupt controller for DSP-based control of multi-rail DC-DC converters with non-integer switching frequency ratio
AU - Mooney, James
AU - Effler, Simon
AU - Halton, Mark
AU - Mahdi, Abdulhussain E.
PY - 2010
Y1 - 2010
N2 - 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.
AB - 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.
KW - Digital control
KW - Digital signal processor
KW - Interrupt controller
KW - Multi-rail DC-DC converters
UR - http://www.scopus.com/inward/record.url?scp=79953111228&partnerID=8YFLogxK
U2 - 10.1109/ICECS.2010.5724734
DO - 10.1109/ICECS.2010.5724734
M3 - Conference contribution
AN - SCOPUS:79953111228
SN - 9781424481576
T3 - 2010 IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2010 - Proceedings
SP - 1204
EP - 1207
BT - 2010 IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2010 - Proceedings
T2 - 2010 IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2010
Y2 - 12 December 2010 through 15 December 2010
ER -