Limit-Cycle-Free Digitally Controlled DC-DC Converters Based on Dyadic Digital PWM

被引：13

作者：

Crovetti, Paolo S. ^{[1
]}

Usmonov, Maksudjon ^{[1
]}

Musolino, Francesco ^{[1
]}

Gregoretti, Francesco ^{[1
]}

机构：

[1] Politecn Torino, Dept Elect & Telecommun, I-10129 Turin, Italy

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2020年 / 35卷 / 10期

关键词：

Pulse width modulation; Clocks; Switching frequency; Limit-cycles; DC-DC power converters; Frequency conversion; Digital control of power converters; dithering; dyadic digital pulse modulation (DDPM); dyadic digital pulsewidth modulation (DDPWM); high-resolution pulsewidth modulation; limit cycle oscillations (LCOs); PULSE-WIDTH MODULATOR; RESOLUTION;

D O I：

10.1109/TPEL.2020.2978696

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Quantization-induced limit cycle oscillations (LCOs) in digitally controlled dc-dc converters are addressed in this article. The novel dyadic digital pulsewidth modulator is proposed to increase the effective pulsewidth modulator 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 16-dB lower frequency harmonic component reduction compared to thermometric dithering for the same resolution increase.

引用

页码：11155 / 11166

页数：12

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