An Effect of Output Capacitor ESL on Hysteretic PLL Controlled Multiphase Buck Converter
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Date
2017-06
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Mark
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Společnost pro radioelektronické inženýrství
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Abstract
This paper provides analysis of output capacitor effects to phase stability of a hysteretic mode controlled buck converter. The hysteretic control method is a simple and fast control technique for switched-mode converters, but the hysteresis control is not oscillator referenced. It results in difficulty to achieve stable switching phase and frequency. In recent papers, the authors propose a use of phase locked loops (PLL) to permit interleaved multiphase operation where each voltage regulator (VR) module is coupled together via output node and leads to a strong loop interaction. In this work analysis of this interaction is studied by Matlab Simulink simulations and a new solution how to partially suppress this effect is given. The proposed method confirms the theoretical analysis.
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Radioengineering. 2017 vol. 26, č. 2, s. 515-521. ISSN 1210-2512
https://www.radioeng.cz/fulltexts/2017/17_02_0515_0521.pdf
https://www.radioeng.cz/fulltexts/2017/17_02_0515_0521.pdf
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Peer-reviewed
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en