A low-power DC-DC converter with digital spread spectrum for reduced EMI

Trescases, Olivier; Wei, Guowen; Ng, Wai Tung

doi:10.1109/pesc.2006.1712244

Cited by 28 publications

(10 citation statements)

References 16 publications

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“…In [14], the authors presented a low power step-down DC-DC converter prototype with a hybrid delay line-based digital pulse-width-modulator. The switching frequency of the buck converter was varied using a pseudo-random 512 cycle pattern.…”

Section: Review Of Noise Spectrum Spreading Techniques In Dc-dc Pmentioning

confidence: 99%

A Double-Hybrid Spread-Spectrum Technique for EMI Mitigation in DC-DC Switching Regulators

Dousoky

Shoyama

Ninomiya

2010

Journal of Power Electronics

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Randomizing the switching frequency (RSF) to reduce the electromagnetic interference (EMI) of switching power converters is a well-known technique that has been previously discussed. The randomized pulse position (RPP) technique, in which the switching frequency is kept fixed while the pulse position (the delay from the starting of the switching cycle to the turn-on instant within the cycle) is randomized, has been previously addressed in the literature for the same purpose. This paper presents a double-hybrid technique (DHB) for EMI reduction in dc-dc switching regulators. The proposed technique employed both the RSF and the RPP techniques. To effectively spread the conducted-noise frequency spectrum and at the same time attain a satisfactory output voltage quality, two parameters (switching frequency and pulse position) were randomized, and a third parameter (the duty ratio) was controlled by a digital compensator. Implementation was achieved using field programmable gate array (FPGA) technology, which is increasingly being adopted in industrial electronic applications. To evaluate the contribution of the proposed DHB technique, investigations were carried out for each basic PWM, RPP, RSF, and DHB technique. Then a comparison was made of the performances achieved. The experimentally investigated features include the effect of each technique on the common-mode, differential-mode, and total conducted-noise characteristics, and their influence on the converter's output ripple voltage.

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Section: Review Of Noise Spectrum Spreading Techniques In Dc-dc Pmentioning

confidence: 99%

A Double-Hybrid Spread-Spectrum Technique for EMI Mitigation in DC-DC Switching Regulators

Dousoky

Shoyama

Ninomiya

2010

Journal of Power Electronics

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“…When DC-DC converters are used, it releases electromagnetic emissions at a very high switching frequency and thus forms main sources of EMI. EMI is any man-made or natural electromagnetic disturbance or signal that causes an unacceptable response or malfunctioning of any electrical or electronic device or system [5][6][7]. Although such techniques as EMI filters and shielding are available to mitigate the EMI, they work as a remedy.…”

Section: Introductionmentioning

confidence: 99%

Effective Suppression of Conducted Electro Magnetic Interference in DC-DC Boost Converter Using Field Programmable Gate Array Based Chaotic Pulse Width Modulation Switching

Natarajan¹,

Rajasekar²

2014

Electric Power Components and Systems

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“…Many DPWM architectures are presented in literature including: counter comparator [12], delay line [5,11,12], hybrid DPWM [8], segmented delay line [16], dithering [5,13], etc. to name a few.…”

Section: Introductionmentioning

confidence: 99%

Segmented Digital Clock Manager- FPGA based Digital Pulse Width Modulator Technique

Batarseh

Al-Hoor

Huang

et al. 2008

2008 IEEE Power Electronics Specialists Conference

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A new Digital Pulse Width Modulator (DPWM) design for a Field Programmable Gate Array (FPGA) based systems is presented in this paper. The proposed architecture fully utilizes the Digital Clock Manager (DCM) resources available on new FPGA boards. The proposed Segmented DCM DPWM is a digital modulator architecture with low power that allows for high switching frequency operation. It relies on the power-optimized resources already existing on new FPGAs. The inherit phase shifting properties of the DCM blocks simplify the duty cycle generation. The architecture can be applied to achieve various number of bits for the DPWM resolution, and is implemented and verified experimentally on a Virtex4 FPGA board.

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A low-power DC-DC converter with digital spread spectrum for reduced EMI

Cited by 28 publications

References 16 publications

A Double-Hybrid Spread-Spectrum Technique for EMI Mitigation in DC-DC Switching Regulators

A Double-Hybrid Spread-Spectrum Technique for EMI Mitigation in DC-DC Switching Regulators

Effective Suppression of Conducted Electro Magnetic Interference in DC-DC Boost Converter Using Field Programmable Gate Array Based Chaotic Pulse Width Modulation Switching

Segmented Digital Clock Manager- FPGA based Digital Pulse Width Modulator Technique

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