Abstract
Switch-mode technology is the common choice for high efficiency audio power amplifiers. The dynamic nature of real audio reduces efficiency as less continuous output power can be achieved. Based on methods used for RF amplifiers this paper
proposes to employ envelope tracking techniques to the power supply in order to improve efficiency. A 100 W prototype system was designed. Measured results show that systems employing envelope tracking can improve system efficiency from 2% to 12%, i.e. a factor of 6. The temperature rise is strongly reduced, especially for the switching power MOSFETs where it is halved from 100 ◦C to 50 ◦C.
proposes to employ envelope tracking techniques to the power supply in order to improve efficiency. A 100 W prototype system was designed. Measured results show that systems employing envelope tracking can improve system efficiency from 2% to 12%, i.e. a factor of 6. The temperature rise is strongly reduced, especially for the switching power MOSFETs where it is halved from 100 ◦C to 50 ◦C.
Original language | English |
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Title of host publication | Proceedings of APEC 2018 |
Number of pages | 6 |
Publisher | IEEE |
Publication date | 2018 |
Pages | 406-411 |
DOIs | |
Publication status | Published - 2018 |
Event | 2018 IEEE Applied Power Electronics Conference and Exposition - Henry B. Gonzalez Convention Center, San Antonio, United States Duration: 4 Mar 2018 → 8 Mar 2018 https://ieeexplore.ieee.org/xpl/conhome/8336027/proceeding |
Conference
Conference | 2018 IEEE Applied Power Electronics Conference and Exposition |
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Location | Henry B. Gonzalez Convention Center |
Country/Territory | United States |
City | San Antonio |
Period | 04/03/2018 → 08/03/2018 |
Internet address |
Keywords
- Envelope tracking
- Switch-mode power amplifiers
- Audio
- Efficiency