A High-Voltage class-D power amplifier with switching frequency regulation for improved high-efficiency output power range

H. Ma; Ronan A.R. van der Zee; Bram Nauta

doi:10.1109/JSSC.2015.2421994

A High-Voltage class-D power amplifier with switching frequency regulation for improved high-efficiency output power range

H. Ma, Ronan A.R. van der Zee, Bram Nauta

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Abstract

This paper describes the power dissipation analysis and the design of an efficiency-improved high-voltage class-D power amplifier. The amplifier adaptively regulates its switching frequency for optimal power efficiency across the full output power range. This is based on detecting the switching output node voltage level at the turn-on transition of the power switches. Implemented in a 0.14 m SOI BCD process, the amplifier achieves 93% efficiency at 45 W output power,80% power efficiency down to 4.5 W output power and 49% efficiency down to 0.45 W output power.

Original language	English
Pages (from-to)	1451-1462
Number of pages	12
Journal	IEEE journal of solid-state circuits
Volume	50
Issue number	6
DOIs	https://doi.org/10.1109/JSSC.2015.2421994
Publication status	Published - 1 Jun 2015

Keywords

EWI-26096
IR-96384
METIS-312649

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10.1109/JSSC.2015.2421994

Haifeng_IEEE_JSSC_June_2015Accepted author version, 544 KB

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title = "A High-Voltage class-D power amplifier with switching frequency regulation for improved high-efficiency output power range",

abstract = "This paper describes the power dissipation analysis and the design of an efficiency-improved high-voltage class-D power amplifier. The amplifier adaptively regulates its switching frequency for optimal power efficiency across the full output power range. This is based on detecting the switching output node voltage level at the turn-on transition of the power switches. Implemented in a 0.14 m SOI BCD process, the amplifier achieves 93% efficiency at 45 W output power,80% power efficiency down to 4.5 W output power and 49% efficiency down to 0.45 W output power.",

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AB - This paper describes the power dissipation analysis and the design of an efficiency-improved high-voltage class-D power amplifier. The amplifier adaptively regulates its switching frequency for optimal power efficiency across the full output power range. This is based on detecting the switching output node voltage level at the turn-on transition of the power switches. Implemented in a 0.14 m SOI BCD process, the amplifier achieves 93% efficiency at 45 W output power,80% power efficiency down to 4.5 W output power and 49% efficiency down to 0.45 W output power.

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A High-Voltage class-D power amplifier with switching frequency regulation for improved high-efficiency output power range

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Keywords

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