Design High-Performance Class-D Audio Amplifiers with EPC’s New Reference Design EPC9192 and eGaN FETs

时间： 2024-04-12 来源：EPC News

技术问答

The EPC9192 Class-D audio reference design enables high power and high efficiency in a modular design for customization and high performance.

EL SEGUNDO, Calif.— April, 2024 — EPC is pleased to announce the launch of the EPC9192, reference design enabling powerful, compact, and efficient Class-D audio amplifiers. The EPC9192 showcases the capabilities of EPC's 200 V, EPC2307, eGaN FETs in a ground-referenced, split dual supply Single-Ended (SE) design, delivering an impressive 700 W per channel into a 4 Ω load.

The EPC9192 features a modular design that allows for scalability and expandability. The motherboard hosts two PWM modulators and two half bridge power stage daughterboards, implementing a two-channel amplifier with housekeeping supplies and protections. This design flexibility enables users to customize the PWM modulator and power stage, facilitating the evaluation and comparison of different devices and modulation techniques.

Key features of the EPC9192 include:

700 W Class-D power stage in a compact size of 4 in³ including output filter and heatsink
Single regulated 12 V power supply input for housekeeping
Dual split supply input, unregulated, ±42 V to ±85 V for power stage
Analog inputs balanced (XLR) or unbalanced (RCA)
Configurable for two independent SE channels or single-channel BTL mode
Undervoltage, Overvoltage, Overcurrent, and Overtemperature protections
> 600 kHz switching frequency

Key performance measurements of the EPC9192 include:

700W@2Ω - 4Ω / 350W@8Ω / channel
BTL capable (1400W @ 4Ω - 8Ω)
< 0.005% THD+N, > 120dB SNR
Noise floor: 40µV
Frequency response: 5 Hz - 20 kHz +/- 0.5 dB, regardless of load

"The EPC9192 is a powerful tool for audio amplifier designers looking to leverage the benefits of GaN technology," said Alex Lidow, CEO of EPC. "With high-power density and scalability, it enables rapid prototyping of compact, high-performance Class-D amplifiers."

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