Infineon Technologies MERUS™ class-D audio amplifier

The MA2304DNS / MA2304PNS is a 2x37 W audio amplifier with integrated audio DSP and I2S / TDM audio interface. It features the MERUS™ multilevel switching amplifier technology enabling unmatched power efficiency at both low and high output power. Multilevel switching also relaxes EMI and enables inductorless applications with lower cost and no compromise in audio performance or efficiency. A high order internal feedback loop ensures low THD for excellent audio performance.

Key features

• Inductor-less output filtering at full power range
• Excellent EMI performance
• 0.03% low THD+N at 1 W, 1 kHz
• Residual noise floor 52 μVrms A-weighted

Additional features

• 52 mW ultra low idle power (18 V PVDD, LPC mode) and high efficiency at low output power (>80 %, 2 W, 8 Ω)
• Configurable output stage – 2x BTL, 1x PBTL
• Extremely low idle power enables prolonged battery life
• Smallest output filtering without bulky inductors
• Easy-to-pass EMI test without sacrificing efficiency or audio performance
• Premium sound quality due to low THD+N and low noise floor
• Flexible output configuration to support different speaker number and power level

Applications

• Battery-powered speakers
• Bluetooth / wireless / smart speakers and soundbars
• Conference speakers
• Multi-channel / multi-room audio systems