Name
Abstract | ||
|---|---|---|
This article presents a Class-D audio amplifier for automotive applications. Low electromagnetic interference (EMI) and, hence, smaller LC filter size are obtained by employing a fully differential multilevel output stage switching at 4.2 MHz. A modulation scheme with minimal switching activity at zero input reduces idle power, which is further assisted by a gate-charge reuse scheme. It also achieves high linearity due to the high loop gain realized by a third-order feedback loop with a bandwidth of 800 kHz. The prototype, fabricated in a 180-nm high-voltage BCD process, achieves a minimum THD+N of -107.8 dB/-102 dB and a peak efficiency of 91%/87% with 8- and 4-Ω loads, respectively, while drawing 7-mA quiescent current from a 14.4-V supply. The prototype meets the CISPR 25 Class 5 EMI standard with a 5.7-dB margin using an LC filter with a cutoff frequency of 580 kHz. |
Year | DOI | Venue |
|---|---|---|
2021 | 10.1109/JSSC.2020.3043815 | IEEE Journal of Solid-State Circuits |
Keywords | DocType | Volume |
Class-D amplifiers,electromagnetic interference (EMI),idle power,multilevel,pulsewidth modulation (PWM) | Journal | 56 |
Issue | ISSN | Citations |
4 | 0018-9200 | 1 |
PageRank | References | Authors |
0.36 | 0 | 7 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Huajun Zhang | 1 | 1 | 0.36 |
| Shoubhik Karmakar | 2 | 11 | 3.84 |
| Lucien J. Breems | 3 | 99 | 20.57 |
| Quino Sandifort | 4 | 1 | 0.36 |
| Marco Berkhout | 5 | 17 | 5.12 |
| Kofi A. A. Makinwa | 6 | 506 | 105.58 |
| Qinwen Fan | 7 | 1 | 0.70 |