Monolithic Power Systems (MPS) MP7758 Audio Amplifiers

Monolithic Power SystemsMP7758 Audio Amplifiers are inductor less, fixed frequency, analog input Class-D audio amplifiers that drives power stereo speakers in a bridge-tied load configuration. These amplifiers are completely integrated thus reducing the solution size. The MP7758 audio amplifiers integrate 240mΩ power MOSFETs and short-circuit protection circuits. These audio amplifiers feature start-up/shutdown pop elimination, advanced EMI performance and are capable of passing EMC tests without an inductor. The MP7758 audio amplifiers are capable of delivering 15W per channel into speakers with a 16V power supply utilizing a stereo BTL structure. These devices exhibit a high fidelity of class-AB amplifiers, with high efficiency, offer an adjustable power limit (PLIMIT) function, and fault output flag. The MP7758 audio amplifiers are widely used in wireless/portable speakers, TVs, DVD receivers, and active speakers.


  • 5V to 18V operation from a single supply
  • ±5A peak current output
  • Output power:
  • 9.5W/channel at 12V, 8Ω load, 10% THD, 15W/channel at 16V, 8Ω load, 10% THD
  • 90% efficiency with 8Ω load, 10% THD, 1kHz, 12V supply voltage
  • 240mΩ power MOSFETs
  • Start-Up/Shutdown pop elimination
  • Short-circuit protection circuits
  • Inductorless topology
  • Advanced EMI performance
  • All switches are current limited
  • Internal Under-Voltage Protection (UVP)
  • Internal thermal protection
  • Adjustable power limit
  • Automatic shutdown with zero input signal detection
  • Fault output flag
  • Available in a TSSOP-28 EP package

Application Diagram

Block Diagram


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