Emission reduction with spread spectrum clocking for switched capacitor buck converter

Volha Subotskaya; Kyrylo Cherniak; Klaus Hoermaier; Bernd Deutschmann

doi:10.1109/ISEMC.2018.8393786

Emission reduction with spread spectrum clocking for switched capacitor buck converter

Volha Subotskaya, Kyrylo Cherniak, Klaus Hoermaier, Bernd Deutschmann

Institute of Electronics (4390)

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › peer-review

Abstract

The reduction of electromagnetic emissions (EME) in switch mode power supplies (SMPS) has high importance especially in automotive applications. The main methods to influence the switching behaviour of SMPS are external filters, spread spectrum techniques and output driver circuits. This paper presents the application of the spread spectrum technique for a 1.25 V and 1.851 MHz switched capacitor buck converter with a digital control loop to reduce the conducted emissions. The frequency modulated sawtooth and pseudo-random profiles are implemented in the digital controller and discretized by a 100 MHz system digital clock. The work investigates the influence of the profile's modulation frequency and the effect of the pulse width modulation (PWM) resolution limitation on the EME reduction. The improvement using a sawtooth profile of 10 dBuV in comparison to the non-modulated PWM signal is seen and discussed. The comparison between modulated and non modulated output voltage ripple is also presented.

Original language	English
Title of host publication	2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 IEEE Asia-Pacific Symposium on Electromagnetic Compatibility, EMC/APEMC 2018
Publisher	Institute of Electrical and Electronics Engineers
Pages	297-302
Number of pages	6
ISBN (Electronic)	9781509059973
DOIs	https://doi.org/10.1109/ISEMC.2018.8393786
Publication status	Published - 22 Jun 2018
Event	60th IEEE International Symposium on Electromagnetic Compatibility and 9th IEEE Asia-Pacific Symposium on Electromagnetic Compatibility, EMC/APEMC 2018 - Suntec City, Singapore Duration: 14 May 2018 → 18 May 2018

Conference

Conference	60th IEEE International Symposium on Electromagnetic Compatibility and 9th IEEE Asia-Pacific Symposium on Electromagnetic Compatibility, EMC/APEMC 2018
Country/Territory	Singapore
City	Suntec City
Period	14/05/18 → 18/05/18

ASJC Scopus subject areas

Aerospace Engineering
Electrical and Electronic Engineering
Safety, Risk, Reliability and Quality
Radiation

Fields of Expertise

Information, Communication & Computing

Access to Document

10.1109/ISEMC.2018.8393786

Cite this

Subotskaya, V., Cherniak, K., Hoermaier, K., & Deutschmann, B. (2018). Emission reduction with spread spectrum clocking for switched capacitor buck converter. In 2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 IEEE Asia-Pacific Symposium on Electromagnetic Compatibility, EMC/APEMC 2018 (pp. 297-302). Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/ISEMC.2018.8393786

Emission reduction with spread spectrum clocking for switched capacitor buck converter. / Subotskaya, Volha; Cherniak, Kyrylo; Hoermaier, Klaus et al.
2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 IEEE Asia-Pacific Symposium on Electromagnetic Compatibility, EMC/APEMC 2018. Institute of Electrical and Electronics Engineers, 2018. p. 297-302.

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › peer-review

Subotskaya, V, Cherniak, K, Hoermaier, K & Deutschmann, B 2018, Emission reduction with spread spectrum clocking for switched capacitor buck converter. in 2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 IEEE Asia-Pacific Symposium on Electromagnetic Compatibility, EMC/APEMC 2018. Institute of Electrical and Electronics Engineers, pp. 297-302, 60th IEEE International Symposium on Electromagnetic Compatibility and 9th IEEE Asia-Pacific Symposium on Electromagnetic Compatibility, EMC/APEMC 2018, Suntec City, Singapore, 14/05/18. https://doi.org/10.1109/ISEMC.2018.8393786

Subotskaya V, Cherniak K, Hoermaier K, Deutschmann B. Emission reduction with spread spectrum clocking for switched capacitor buck converter. In 2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 IEEE Asia-Pacific Symposium on Electromagnetic Compatibility, EMC/APEMC 2018. Institute of Electrical and Electronics Engineers. 2018. p. 297-302 doi: 10.1109/ISEMC.2018.8393786

Subotskaya, Volha ; Cherniak, Kyrylo ; Hoermaier, Klaus et al. / Emission reduction with spread spectrum clocking for switched capacitor buck converter. 2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 IEEE Asia-Pacific Symposium on Electromagnetic Compatibility, EMC/APEMC 2018. Institute of Electrical and Electronics Engineers, 2018. pp. 297-302

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Emission reduction with spread spectrum clocking for switched capacitor buck converter

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