Quantization-induced limit cycle oscillations (LCOs) in digitally controlled DC-DC converters are addressed in this paper. The novel Dyadic Digital PWM (DDPWM) is proposed to increase the effective pulse-width-modulator (PWM) resolution, as required for LCO-free operation, at low cost, without sacrificing DC accuracy and with no detrimental effects on the ripple voltage. Experimental results on a synchronous buck validate the approach highlighting effective LCOs suppression and DC accuracy enhancement at 5X reduced peak output voltage ripple and up to 16dB lower-frequency harmonic component reduction compared to thermometric dithering for the same resolution increase.
Limit Cycle-Free Digitally Controlled DC-DC Converters based on Dyadic Digital PWM / Crovetti, Paolo S.; Usmonov, Maksudjon; Musolino, Francesco; Gregoretti, Francesco. - In: IEEE TRANSACTIONS ON POWER ELECTRONICS. - ISSN 0885-8993. - STAMPA. - (2020). [10.1109/TPEL.2020.2978696]
Titolo: | Limit Cycle-Free Digitally Controlled DC-DC Converters based on Dyadic Digital PWM | |
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Data di pubblicazione: | 2020 | |
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Digital Object Identifier (DOI): | http://dx.doi.org/10.1109/TPEL.2020.2978696 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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FINAL_VERSION.pdf | Post-print non editoriale | 2. Post-print / Author's Accepted Manuscript | PUBBLICO - Tutti i diritti riservati | Visibile a tuttiVisualizza/Apri |
Crovetti-Limit.pdf | 2a Post-print versione editoriale / Version of Record | Non Pubblico - Accesso privato/ristretto | Administrator Richiedi una copia |
http://hdl.handle.net/11583/2806472