Two-Phase Interleaved Buck Converter with a new Digital Self-Oscillating Modulkator

Lars Tønnes Jakobsen; Michael Andreas E. Andersen

doi:10.1109/ICPE.2007.4692490

Two-Phase Interleaved Buck Converter with a new Digital Self-Oscillating Modulkator

Lars Tønnes Jakobsen, Michael Andreas E. Andersen

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Abstract

This paper presents a new Digital Self-Oscillating Modulator (DiSOM) for DC/DC converters. The DiSOM modulator alllows the digital control algorithm to sample the output voltage at a sampling frequency higher than the converter switching frequency. This enables higher control loop bandwidth than for traditional digital PWM modulators given a certain switching frequency. A synchronised version of the DiSOM modulator is derived for interleaved converters. A prototype interleaved Buck converter for Point of Load applications has been designed and built to test the performance of DiSOM modulator. The DiSOM modulator and a digital control algorithm have been implemented in an FPGA. Experimental results show that the converter has a very fast transient response when a loadstep is applied to the output. For a loadstep of 50% of nominal output current the output voltage overshoot is less than 2.5% of the nominal output voltage and the settling time is just 8 switching periods.

Original language	English
Title of host publication	7th International Conference on Power Electronics 2007, ICPE 2007
Publisher	IEEE
Publication date	2007
ISBN (Print)	978-142441872-5
DOIs	https://doi.org/10.1109/ICPE.2007.4692490
Publication status	Published - 2007
Event	7th International Conference on Power Electronics - Daegu, Korea, Republic of Duration: 22 Oct 2007 → 26 Oct 2007 Conference number: 7

Conference

Conference	7th International Conference on Power Electronics
Number	7
Country/Territory	Korea, Republic of
City	Daegu
Period	22/10/2007 → 26/10/2007

Bibliographical note

Copyright: 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

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@inproceedings{20492114f70647d9bfdc82dc3046d6a2,

title = "Two-Phase Interleaved Buck Converter with a new Digital Self-Oscillating Modulkator",

abstract = "This paper presents a new Digital Self-Oscillating Modulator (DiSOM) for DC/DC converters. The DiSOM modulator alllows the digital control algorithm to sample the output voltage at a sampling frequency higher than the converter switching frequency. This enables higher control loop bandwidth than for traditional digital PWM modulators given a certain switching frequency. A synchronised version of the DiSOM modulator is derived for interleaved converters. A prototype interleaved Buck converter for Point of Load applications has been designed and built to test the performance of DiSOM modulator. The DiSOM modulator and a digital control algorithm have been implemented in an FPGA. Experimental results show that the converter has a very fast transient response when a loadstep is applied to the output. For a loadstep of 50\% of nominal output current the output voltage overshoot is less than 2.5\% of the nominal output voltage and the settling time is just 8 switching periods.",

author = "Jakobsen, \{Lars T{\o}nnes\} and Andersen, \{Michael Andreas E.\}",

note = "Copyright: 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE; 7th International Conference on Power Electronics, ICPE 2007 ; Conference date: 22-10-2007 Through 26-10-2007",

year = "2007",

doi = "10.1109/ICPE.2007.4692490",

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AU - Andersen, Michael Andreas E.

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Y1 - 2007

N2 - This paper presents a new Digital Self-Oscillating Modulator (DiSOM) for DC/DC converters. The DiSOM modulator alllows the digital control algorithm to sample the output voltage at a sampling frequency higher than the converter switching frequency. This enables higher control loop bandwidth than for traditional digital PWM modulators given a certain switching frequency. A synchronised version of the DiSOM modulator is derived for interleaved converters. A prototype interleaved Buck converter for Point of Load applications has been designed and built to test the performance of DiSOM modulator. The DiSOM modulator and a digital control algorithm have been implemented in an FPGA. Experimental results show that the converter has a very fast transient response when a loadstep is applied to the output. For a loadstep of 50% of nominal output current the output voltage overshoot is less than 2.5% of the nominal output voltage and the settling time is just 8 switching periods.

AB - This paper presents a new Digital Self-Oscillating Modulator (DiSOM) for DC/DC converters. The DiSOM modulator alllows the digital control algorithm to sample the output voltage at a sampling frequency higher than the converter switching frequency. This enables higher control loop bandwidth than for traditional digital PWM modulators given a certain switching frequency. A synchronised version of the DiSOM modulator is derived for interleaved converters. A prototype interleaved Buck converter for Point of Load applications has been designed and built to test the performance of DiSOM modulator. The DiSOM modulator and a digital control algorithm have been implemented in an FPGA. Experimental results show that the converter has a very fast transient response when a loadstep is applied to the output. For a loadstep of 50% of nominal output current the output voltage overshoot is less than 2.5% of the nominal output voltage and the settling time is just 8 switching periods.

U2 - 10.1109/ICPE.2007.4692490

DO - 10.1109/ICPE.2007.4692490

M3 - Article in proceedings

SN - 978-142441872-5

BT - 7th International Conference on Power Electronics 2007, ICPE 2007

PB - IEEE

T2 - 7th International Conference on Power Electronics

Y2 - 22 October 2007 through 26 October 2007

ER -

Two-Phase Interleaved Buck Converter with a new Digital Self-Oscillating Modulkator

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