A 28-W, -102.2-dB THD+N Class-D Amplifier Using a Hybrid ΔΣM-PWM Scheme

Shoubhik Karmakar; Huajun Zhang; Robert van Veldhoven; Lucien J. Breems; Marco Berkhout; Qinwen Fan; Kofi A.A. Makinwa

doi:10.1109/JSSC.2020.3023874

A 28-W, -102.2-dB THD+N Class-D Amplifier Using a Hybrid ΔΣM-PWM Scheme

Shoubhik Karmakar, Huajun Zhang, Robert van Veldhoven, Lucien J. Breems, Marco Berkhout, Qinwen Fan, Kofi A.A. Makinwa

Research output: Contribution to journal › Article › Scientific › peer-review

9 Citations (Scopus)

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Abstract

This article presents a 28-W class-D amplifier for automotive applications. The combination of a high switching frequency and a hybrid multibit Δ Σ M-PWM scheme results in high linearity over a wide range of output power, as well as low AM-band EMI. As a result, only a small (150-kHz cutoff frequency), and thus low-cost, LC filter is needed to meet the CISPR-25 EMI average limit (150 kHz-30 MHz) with 10-dB margin. At 28-W output power, the proposed amplifier achieves 91% efficiency while driving a 4- Ω load from a 14.4-V supply. It attains a peak THD+N of 0.00077% (-102.2 dB) for a 1-kHz input signal.

Original language	English
Article number	9207737
Pages (from-to)	3146-3156
Number of pages	11
Journal	IEEE Journal of Solid-State Circuits
Volume	55
Issue number	12
DOIs	https://doi.org/10.1109/JSSC.2020.3023874
Publication status	Published - 2020

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

audio power amplifier
class-D amplifier
electro-magnetic interference (EMI)
hybrid
pulsewidth modulation (PWM)
ΔΣM

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10.1109/JSSC.2020.3023874

09207737Final published version, 9.01 MB

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title = "A 28-W, -102.2-dB THD+N Class-D Amplifier Using a Hybrid ΔΣM-PWM Scheme",

abstract = "This article presents a 28-W class-D amplifier for automotive applications. The combination of a high switching frequency and a hybrid multibit Δ Σ M-PWM scheme results in high linearity over a wide range of output power, as well as low AM-band EMI. As a result, only a small (150-kHz cutoff frequency), and thus low-cost, LC filter is needed to meet the CISPR-25 EMI average limit (150 kHz-30 MHz) with 10-dB margin. At 28-W output power, the proposed amplifier achieves 91% efficiency while driving a 4- Ω load from a 14.4-V supply. It attains a peak THD+N of 0.00077% (-102.2 dB) for a 1-kHz input signal. ",

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author = "Shoubhik Karmakar and Huajun Zhang and {van Veldhoven}, Robert and Breems, {Lucien J.} and Marco Berkhout and Qinwen Fan and Makinwa, {Kofi A.A.}",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. ",

year = "2020",

doi = "10.1109/JSSC.2020.3023874",

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AU - Zhang, Huajun

AU - van Veldhoven, Robert

AU - Breems, Lucien J.

AU - Berkhout, Marco

AU - Fan, Qinwen

AU - Makinwa, Kofi A.A.

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2020

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AB - This article presents a 28-W class-D amplifier for automotive applications. The combination of a high switching frequency and a hybrid multibit Δ Σ M-PWM scheme results in high linearity over a wide range of output power, as well as low AM-band EMI. As a result, only a small (150-kHz cutoff frequency), and thus low-cost, LC filter is needed to meet the CISPR-25 EMI average limit (150 kHz-30 MHz) with 10-dB margin. At 28-W output power, the proposed amplifier achieves 91% efficiency while driving a 4- Ω load from a 14.4-V supply. It attains a peak THD+N of 0.00077% (-102.2 dB) for a 1-kHz input signal.

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A 28-W, -102.2-dB THD+N Class-D Amplifier Using a Hybrid ΔΣM-PWM Scheme

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