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

Journal article (2020)

Authors

S. Karmakar Electronic Instrumentation - EEMCS
H. Zhang Electronic Instrumentation - EEMCS
Robert van Veldhoven NXP Semiconductors
Lucien Breems NXP Semiconductors
M. Berkhout Goodix Technologies
Q. Fan Electronic Instrumentation - EEMCS
K.A.A. Makinwa Microelectronics
Research Group
Electronic Instrumentation (EEMCS) (TU Delft)
Copyright: © 2020 S. Karmakar, H. Zhang, Robert van Veldhoven, Lucien J. Breems, M. Berkhout, Q. Fan, K.A.A. Makinwa
DOI: https://doi.org/10.1109/JSSC.2020.3023874
More Info
expand_more

Published Date

2020

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronic Instrumentation

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.

Files

FINAL_VERSION_PP.pdf
(pdf | 4.13 Mb)
Unknown license

Download not available

09207737.pdf
(pdf | 9.1 Mb)
- Embargo expired in 25-03-2022
Unknown license