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Unified Digital Modulation Techniques for DC–DC Converters Over a Wide Operating Range: Implementation, Modeling, and Design Guidelines.
- Source :
- IEEE Transactions on Circuits & Systems. Part I: Regular Papers; Apr2018, Vol. 65 Issue 4, p1442-1453, 12p
- Publication Year :
- 2018
-
Abstract
- It is essential to retain improved efficiency in a dc–dc converter over a wide load current range to extend the battery-life in portable devices. This requires a multi-mode controller, consisting of pulse-width-modulation (PWM) and pulse-frequency-modulation (PFM) schemes. However, existing approaches attempt to integrate structurally different controllers; thus it is difficult to achieve a seamless controller transition. While a digital platform offers controller configurations, it remains difficult to identify a suitable digital PWM/PFM technique and decide on its sampling mechanism to achieve stable behavior. This paper proposes a unified digital PWM/PFM scheme which shares a common digital PWM (DPWM) block and has the provisions for online controller configuration and automatic (switching) frequency adaptation. The proposed scheme retains improved efficiency over a wide operating range and inherently achieves seamless controller transitions. Further, a unified discrete-time framework is proposed for the analysis and design of the proposed multi-mode controller. Buck and boost converter prototypes are tested and the proposed controller is implemented using a field-programmable-gate-array device. [ABSTRACT FROM AUTHOR]
- Subjects :
- DIGITAL modulation
DC-to-DC converters
PULSE frequency modulation
Subjects
Details
- Language :
- English
- ISSN :
- 15498328
- Volume :
- 65
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Circuits & Systems. Part I: Regular Papers
- Publication Type :
- Periodical
- Accession number :
- 128462997
- Full Text :
- https://doi.org/10.1109/TCSI.2017.2753539