IRAUDAMP7S

The IRAUDAMP7S reference design is a two-channel Class D audio power amplifier that features output power scalability. The IRAUDAMP7S offers selectable half-bridge (stereo) and full-bridge (bridged) modes. This reference design demonstrates how to use the IRS2092 Class D audio driver IC, along with IR’s digital audio dual MOSFETs, such as IRFI4024H-117P, IRFI4019H-117P, IRFI4212H-117P and IRFI4020H-117P, on a single layer PCB. The design shows how to implement peripheral circuits on an optimum PCB layout using a single sided board. The resulting design requires a small heatsink for normal operation (one-eighth of continuous rated power). The reference design provides all the required housekeeping power supplies and protections.

• Output Power: Scalable output power from 25W- 500W (see Table 1)
• Residual Noise: 200 µV, IHF-A weighted, AES-17 filter
• Distortion: 0.007 % THD+N @ 60W, 4 ?
• Efficiency: 90 % @ 500W, 8 ?, Class D stage
• Multiple Protection Features:
  • Over-current protection (OCP)
  • high side and low side MOSFET Over-voltage protection (OVP)
  • Under-voltage protection (UVP)
  • high side and low side MOSFET DC-protection (DCP)
  • Over-temperature protection (OTP)
• PWM topology:
  • Self-oscillating PWM
  • half-bridge or full-bridge topologies selectable