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MASH Δ-Σ DPWM based sliding-mode controller dedicating to high frequency SMPS

Abstract : The high resolution digital pulse width modulator (DPWM) becomes a crucial part in digital controller for power converters that requires a fast system clock, especially applied to a high switching frequency SMPS. This paper proposes two solutions, the dithering Multi-stAge-noise-Shaping (MASH) and the 2-2 MASH delta-sigma (Δ-Σ) DPWM, so as to alleviate the inherent idle tone effects. An improved sliding mode controller (SMC) is also introduced here exhibiting better performance than the traditional PID compensator. Mixed-signal simulation are presented to demonstrate the theoretical analysis. Experimental results verify the SMPS close-loop operation on 3 V input with 5 V output, 1 A DC-DC boost converter at 1 MHz switching frequency, using a Virtex-II FPGA platform. A digital controller integrated chip (IC) including both DPWM and SMC is introduced as a verification prototype that potentially achieves switching frequency beyond 10MHz.
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https://hal.archives-ouvertes.fr/hal-00704656
Contributor : Publications Ampère <>
Submitted on : Tuesday, June 5, 2012 - 11:00:43 PM
Last modification on : Tuesday, April 7, 2020 - 2:01:13 AM

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  • HAL Id : hal-00704656, version 1

Citation

Bo Li, Shuibao Guo, Xuefang Lin-Shi, Bruno Allard. MASH Δ-Σ DPWM based sliding-mode controller dedicating to high frequency SMPS. EPE, Aug 2011, Birmingham, United Kingdom. pp.CD. ⟨hal-00704656⟩

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