100V GaN chips shrink Class D audio amplifier
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SounDigital in Brazil has used the latest 100V gallium nitride transistors from Infineon Technologies for a 1500W Class D audio amplifier.
The five channel Class D amplifier switches at 800 kHz, allowing smaller magnetics ot be used to reduce the size. Using the CoolGaN enhanced-mode GaN transistor improves the energy efficiency of the amplifier by five percentage points and reduces energy loss by 60 percent, or 75 W, allowing for a heat sink that is half the size of previously.
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With the IGC033S101 in a PQFN-3×5 package and IGB110S101 in a PQFN-3×3 package, the overall system size to be reduced by 40 percent without compromising performance. The audio quality has been further improved by using the CoolGaN devices, with total harmonic distortion (THD) reduced by 70 percent while the standby current has also been reduced by 40 percent.
“We are excited to enhance the performance of our audio amplifiers using Infineon’s GaN power semiconductors, enabling us to inspire people and provide entertainment by amplifying music around the world,” said Juliano Anflor, CEO of SounDigital. “GaN transistors significantly enhances our overall system performance with minimized system cost and increased ease of use.”
“GaN technology is transforming the audio amplifier industry, providing unparalleled efficiency and performance,” said Johannes Schoiswohl, Head of the GaN Business Line at Infineon. “ GaN delivers superior sound quality, higher power density, and reduced energy consumption, enabling SounDigital’s audio systems to reach new levels of fidelity and performance.”
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