GaN E-HEMT fast switching, low output capacitance (Coss), and zero reverse recovery charge (QRR) enable a new level of performance for Class D audio amplifiers.
The new GS-EVB-AUD-xxx1-GS GaN-based evaluation board platform from GaN Systems, provides an excellent reference design for implementing a high-performance, low-cost audio system.
The Class D amplifier and companion power supply designs are optimised for sound quality, thermal performance, size and cost.
Key features of the 2-channel Class D amplifier include:
- Complete Class D amplifier
- Multi audio signal inputs
- Bridge-tied load output
- Option to switch between open-loop and closed-loop designs with optimized DSP control of each configuration
- High-performance audio
- 200 W/Ch (8 Ω), 300 W/Ch (4 Ω)
- > 108 dB SNR and dynamic range
- < 0.01% THD+N (8 Ω, 1 W)
- +/- 0.5 dB frequency response (8 Ω)
- High-performance output
- 96% efficiency
- Reduced thermals
Key features of the companion switch mode power supply include:
- Complete audio LLC SMPS
- Universal AC line input
- Easy integration with GaN amplifier
- Common-mode AC filter
- High-performance audio
- 400 W continuous, 550 W peak
- +/- 32 VDC dual-rail output
- High-performance output
- No heatsinking, no cooling
- High efficiency, 40% loss decrease
- EMI/EMC friendly