Hysteretic self-oscillating bandpass current mode control for Class D audio amplifiers driving capacitive transducers

Dennis Nielsen; Arnold Knott; Michael A. E. Andersen

doi:10.1109/ECCE-Asia.2013.6579224

Hysteretic self-oscillating bandpass current mode control for Class D audio amplifiers driving capacitive transducers

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

1 Downloads (Orbit)

Abstract

A hysteretic self-oscillating bandpass current mode control (BPCM) scheme for Class D audio amplifiers driving capacitive transducers are presented. The scheme provides excellent stability margins and low distortion over a wide range of operating conditions. Small-signal behavior of the amplifier is analysis through transfer function based linear control methodology. Measurements are performed on a single-ended ± 300 V half-bridge amplifier driving a capacitive load of 100 nF. Total Harmonic Distortion plus noise (THD+N) below 0.1 % are reported. Transducers representing a capacitive load and obeying the rules of electrostatics have been known as very interesting alternatives to the traditional inefficient electrodynamic transducers. When driving capacitive transducers from a Class D audio
amplifier the high impedance nature of the load represents a key challenge. The BPCM control scheme ensures a flat frequency response (within 3 db) over the midrange region of 200 Hz – 3.5 kHz.

Original language	English
Title of host publication	Proceedings of the 2013 IEEE ECCE Asia Downunder
Publisher	IEEE
Publication date	2013
Pages	971-975
ISBN (Print)	978-1-4799-0482-2
DOIs	https://doi.org/10.1109/ECCE-Asia.2013.6579224
Publication status	Published - 2013
Event	5th Annual International Energy Conversion Congress and Exhibition - Crown Convention Centre, Melbourne, Australia Duration: 3 Jun 2013 → 6 Jun 2013

Conference

Conference	5th Annual International Energy Conversion Congress and Exhibition
Location	Crown Convention Centre
Country/Territory	Australia
City	Melbourne
Period	03/06/2013 → 06/06/2013

Keywords

Capacitance
Gain measurement
Switches
Voltage measurement

Access to Document

10.1109/ECCE-Asia.2013.6579224

OpenUrl availability

Check availability in DTU Findit

Cite this

@inproceedings{4449c78b67f145009336175521af1c58,

title = "Hysteretic self-oscillating bandpass current mode control for Class D audio amplifiers driving capacitive transducers",

abstract = "A hysteretic self-oscillating bandpass current mode control (BPCM) scheme for Class D audio amplifiers driving capacitive transducers are presented. The scheme provides excellent stability margins and low distortion over a wide range of operating conditions. Small-signal behavior of the amplifier is analysis through transfer function based linear control methodology. Measurements are performed on a single-ended ± 300 V half-bridge amplifier driving a capacitive load of 100 nF. Total Harmonic Distortion plus noise (THD+N) below 0.1 \% are reported. Transducers representing a capacitive load and obeying the rules of electrostatics have been known as very interesting alternatives to the traditional inefficient electrodynamic transducers. When driving capacitive transducers from a Class D audio amplifier the high impedance nature of the load represents a key challenge. The BPCM control scheme ensures a flat frequency response (within 3 db) over the midrange region of 200 Hz – 3.5 kHz.",

keywords = "Capacitance, Gain measurement, Switches, Voltage measurement",

author = "Dennis Nielsen and Arnold Knott and Andersen, \{Michael A. E.\}",

year = "2013",

doi = "10.1109/ECCE-Asia.2013.6579224",

language = "English",

isbn = "978-1-4799-0482-2",

pages = "971--975",

booktitle = "Proceedings of the 2013 IEEE ECCE Asia Downunder",

publisher = "IEEE",

address = "United States",

note = "5th Annual International Energy Conversion Congress and Exhibition, ECCE Asia DownUnder 2013 ; Conference date: 03-06-2013 Through 06-06-2013",

}

Nielsen, D, Knott, A & Andersen, MAE 2013, Hysteretic self-oscillating bandpass current mode control for Class D audio amplifiers driving capacitive transducers. in Proceedings of the 2013 IEEE ECCE Asia Downunder . IEEE, pp. 971-975, 5th Annual International Energy Conversion Congress and Exhibition, Melbourne, Australia, 03/06/2013. https://doi.org/10.1109/ECCE-Asia.2013.6579224

TY - GEN

T1 - Hysteretic self-oscillating bandpass current mode control for Class D audio amplifiers driving capacitive transducers

AU - Nielsen, Dennis

AU - Knott, Arnold

AU - Andersen, Michael A. E.

PY - 2013

Y1 - 2013

N2 - A hysteretic self-oscillating bandpass current mode control (BPCM) scheme for Class D audio amplifiers driving capacitive transducers are presented. The scheme provides excellent stability margins and low distortion over a wide range of operating conditions. Small-signal behavior of the amplifier is analysis through transfer function based linear control methodology. Measurements are performed on a single-ended ± 300 V half-bridge amplifier driving a capacitive load of 100 nF. Total Harmonic Distortion plus noise (THD+N) below 0.1 % are reported. Transducers representing a capacitive load and obeying the rules of electrostatics have been known as very interesting alternatives to the traditional inefficient electrodynamic transducers. When driving capacitive transducers from a Class D audio amplifier the high impedance nature of the load represents a key challenge. The BPCM control scheme ensures a flat frequency response (within 3 db) over the midrange region of 200 Hz – 3.5 kHz.

AB - A hysteretic self-oscillating bandpass current mode control (BPCM) scheme for Class D audio amplifiers driving capacitive transducers are presented. The scheme provides excellent stability margins and low distortion over a wide range of operating conditions. Small-signal behavior of the amplifier is analysis through transfer function based linear control methodology. Measurements are performed on a single-ended ± 300 V half-bridge amplifier driving a capacitive load of 100 nF. Total Harmonic Distortion plus noise (THD+N) below 0.1 % are reported. Transducers representing a capacitive load and obeying the rules of electrostatics have been known as very interesting alternatives to the traditional inefficient electrodynamic transducers. When driving capacitive transducers from a Class D audio amplifier the high impedance nature of the load represents a key challenge. The BPCM control scheme ensures a flat frequency response (within 3 db) over the midrange region of 200 Hz – 3.5 kHz.

KW - Capacitance

KW - Gain measurement

KW - Switches

KW - Voltage measurement

U2 - 10.1109/ECCE-Asia.2013.6579224

DO - 10.1109/ECCE-Asia.2013.6579224

M3 - Article in proceedings

SN - 978-1-4799-0482-2

SP - 971

EP - 975

BT - Proceedings of the 2013 IEEE ECCE Asia Downunder

PB - IEEE

T2 - 5th Annual International Energy Conversion Congress and Exhibition

Y2 - 3 June 2013 through 6 June 2013

ER -

Hysteretic self-oscillating bandpass current mode control for Class D audio amplifiers driving capacitive transducers

Abstract

Conference

Keywords

Access to Document

OpenUrl availability

Fingerprint

Cite this