15.7 An 8.3MHz GaN Power Converter Using Markov Continuous RSSM for 35dBμV Conducted EMI Attenuation and One-Cycle TON Rebalancing for 27.6dB VO Jittering Suppression
dc.contributor.author | Chen, Yingping | |
dc.contributor.author | Ma, Dongsheng (Brian) | |
dc.contributor.utdAuthor | Chen, Yingping | |
dc.contributor.utdAuthor | Ma, Dongsheng (Brian) | |
dc.date.accessioned | 2019-11-08T21:39:57Z | |
dc.date.available | 2019-11-08T21:39:57Z | |
dc.date.created | 2019-02-17 | |
dc.description | Full text access from Treasures at UT Dallas is restricted to current UTD affiliates (use the provided Link to Article). | |
dc.description.abstract | GaN power switches have gained fast-growing popularity in power electronics. With a similar R DS_ON resistance, they boast 2-to-3-order lower gate capacitance than silicon counterparts, making them highly desirable in high-frequency (fsw ), high-performance power converters. However, at high f sw , switching transitions have to be completed in much shorter times, creating much larger di/dt and dv/dt changes in power stage, which directly link to electromagnetic-interference (EMI) emissions [1]. To suppress EMI, spread-spectrum-modulation (SSM) techniques [2-5] have been proposed. As depicted in Fig. 15.7.1, a periodic SSM (PSSM) is straightforward and easy to implement. However, its EMI suppression is not effective [2]. A randomized SSM (RSSM) can outperform the PSSM, with lower peak EMI and near-uniform noise spreading, but its performance highly relies on the random clock design. In [3], an N-bit digital random clock was reported to achieve a discrete RSSM (D-RSSM). However, the bit number N has to be large in order to achieve satisfying EMI attenuation, significantly increasing circuit complexity, chip area, and power consumption. To overcome this, a thermal-noise-based random clock was proposed [4]. Unfortunately, thermal noise is very sensitive to temperature and is hard to predict. To apply this approach to a practical implementation requires additional signal processing with periodic signals to confine its range of randomization, which, in turn, reduces the benefits of the RSSM. To achieve a near ideal RSSM, a continuous RSSM (C-RSSM) with a cost-effective implementation is highly preferable. Meanwhile, another challenge of applying SSM schemes lies in the fact that the schemes deteriorate V O voltage regulation. As shown in Fig. 15.7.1, as an SSM scheme continuously or periodically modulates f sw , a converter switching period fluctuates cycle by cycle, causing random errors on the duty ratio and thus jittering effect on V O. This is difficult to correct by a feedback control loop, as the duty-ratio error changes randomly between switching cycles. Due to a limited loop-gain bandwidth, the loop response usually lags far behind. Although a ramp compensation scheme was reported to resolve this [5], the improvement is very limited, and the scheme only works for voltage-mode converters. © 2019 IEEE. | |
dc.description.department | Erik Jonsson School of Engineering and Computer Science | |
dc.description.sponsorship | This work is in part sponsored by Semiconductor Research Corporation (SRC) under the research contract GRC 2810.006 and National Science Foundation (NSF) under the research contract NSF CCF 1702496. | |
dc.identifier.bibliographicCitation | Chen, Y., and D. B. Ma. 2019. "15.7 An 8.3MHz GaN Power Converter Using Markov Continuous RSSM for 35dBμV Conducted EMI Attenuation and One-Cycle TON Rebalancing for 27.6dB V O Jittering Suppression." Digest of Technical Papers - IEEE International Solid-State Circuits Conference: 250-252, doi: 10.1109/ISSCC.2019.8662380 | |
dc.identifier.isbn | 9781538685310 | |
dc.identifier.uri | https://hdl.handle.net/10735.1/7083 | |
dc.language.iso | en | |
dc.publisher | Institute of Electrical and Electronics Engineers Inc. | |
dc.relation.isPartOf | Digest of Technical Papers - IEEE International Solid-State Circuits Conference | |
dc.relation.uri | https://dx.doi.org/10.1109/ISSCC.2019.8662380 | |
dc.rights | ©2019 IEEE | |
dc.subject | Real-time clocks (Computers) | |
dc.subject | Cost effectiveness | |
dc.subject | Electromagnetic pulse | |
dc.subject | Gallium nitride | |
dc.subject | Semiconductors | |
dc.subject | Converters, Electric | |
dc.subject | Signal processing | |
dc.subject | Spectrum analysis | |
dc.subject | Cost effectiveness | |
dc.subject | Feedback control systems | |
dc.subject | Noise, Thermal | |
dc.title | 15.7 An 8.3MHz GaN Power Converter Using Markov Continuous RSSM for 35dBμV Conducted EMI Attenuation and One-Cycle TON Rebalancing for 27.6dB VO Jittering Suppression | |
dc.type.genre | article |
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