5W-30W Class-D Mono Bridged Audio Amplifier



The MP7731 is a mono, 5W to 30W Class-D Audio Amplifier. It is one of MPS’ second generation of fully integrated audio amplifiers which dramatically reduces solution size by integrating the following: • Start Up / Shut Down Pop Elimination • Short Circuit Protection Circuits• 180mΩ Power MOSFETs • Mute / Standby Mode The MP7731 utilizes a full bridge output structure capable of delivering 5W - 30W into 4Ω speakers. As in all other MPS Class D Audio Amplifiers, this device exhibits the high fidelity of a Class AB amplifier with an efficiency of 90%. The circuit is based on the MPS’ proprietary variable frequency topology Analog Adaptive Modulation (AAM, Patent No. 6,420,930; other patents pending) that delivers excellent PSRR, fast response time and operates on a single power supply.


  • 30W into 4Ω with VDD = 16.5V
  • 90% Efficiency at 5W
  • Amplifies Full Audio Range with Low THD+N
  • Typical = 0.1%
  • 9.5V to 18V Supply Voltage Operation
  • Full-Bridge Output Drive
  • 4 Integrated 180mΩ Switches
  • Turn On / Turn Off Click and Pop Suppression
  • Integrated Short Circuit Protection
  • Integrated Thermal shutdown
  • Mute / Standby Mode


  • PackageTSSOP20E
  • GradeCatalog
  • TypeMono BTL
  • Isw Limit (A)5
  • Total Pout (max) (W)30
  • PSRR (dB)-60
  • THD+N (%) @1W0.1
  • Efficiency (%)90
  • Vin (max) (V)18
  • Vin (min) (V)9.5