MP7752 Inductorless Class-D Audio Amplifier

By Monolithic Power Systems 49

MP7752 Inductorless Class-D Audio Amplifier

Monolithic Power Systems' MP7752 is an analog input inductorless class-D audio amplifier, which drives stereo speakers in bridge-tied-load configuration. It is a fully integrated audio amplifier, which reduces solution size dramatically. It integrates 240 mΩ power MOSFETs and short-circuit protection circuits, and it features start-up/shutdown pop elimination and advanced EMI performance. Also, it is inductorless while passing the EMC test.

The MP7752 utilizes a stereo BTL structure capable of delivering 15 W per channel into 8 Ω speakers with a 16 V power supply. MPS class-D audio amplifiers exhibit the high fidelity of class-AB amplifiers at high efficiency. The MP7752 includes an internal circuit which allows the system to shut down automatically after the absence of the audio signal is detected. This feature is used for energy-using products and battery operated applications.

Also, it has an adjustable power limit function. The PLIMIT circuit sets a limit on the output peak-to-peak voltage. This is done by limiting the duty cycle to a fixed maximum value. This limit can be thought of as a "virtual" voltage rail, which is lower than the supply connected to PVCC. The MP7752 is available in a TSSOP-28 EP package.

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

Applications

  • TV
  • DVD Receiver
  • Active Speaker

New Products:

MP7752GF

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