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Monolithic Power Systems (MPS) MPQ7795 Audio Amplifiers

Monolithic Power Systems (MPS) MPQ7795 Audio Amplifiers are automotive-grade, low-EMI, differential analog input Class-D audio amplifiers with I2C diagnostics. These audio amplifiers are fully integrated and can drive a mono speaker in a Bridge-Tied Load (BTL) configuration. Using BTL structure, these amplifiers are capable of delivering 24.5W into 4Ω speakers with a 14.4V power supply (PVDD). The MPQ7795 audio amplifiers use class-D architecture but exhibit the high fidelity and efficiency of Class-AB amplifiers. These audio amplifiers integrate a load diagnostic function that detects open load, short load, load-to-GND short, and load-to-PVDD short conditions. This diagnostic works when the device is enabled, which protects the load and the device. The MPQ7795 audio amplifiers are used in automotive e-call systems, telematics systems, infotainment audio, and cluster systems.

In addition to Over-Current Protection (OCP), Under-Voltage Protection (UVP), and Over-Temperature Protection (OTP), the MPQ7795 amplifiers feature an adjustable power limit (PLIMIT) function. The PLIMIT circuit sets a limit on the output’s peak-to-peak voltage (VPK-PK), which is accomplished by limiting the duty cycle to a fixed maximum value. This limit can be considered a virtual voltage rail, and it is below the supply connected to PVDD.

Features

  • Built to handle automotive transients:
    • Up to 42V load dump 
    • Cold crank down to 4.5V
  • Cooler thermals:
    • Deliver 24.5W into 4Ω loads with 14.4V PVDD
    • High power efficiency:
      • Up to 92.6% for 8Ω load
      • Up to 90.4% for 4Ω load
    • Less than 20°C junction temperature (TJ) rise at 8Ω, 14W/470kHz
    • Low-ohmic BCD FET technology
  • Low EMI/EMC noise:
    • Meet CISPR 25 class 5
    • MeshConnect™ flip-chip packaging
    • Operates outside of AM radio band
  • Extends vehicle battery life:
    • 0.02μA standby current (IQSTBY)
    • 16mA Quiescent current (IQ)
  • Additional Features:
    • Load diagnostics:
      • Open load or short load
      • Output short to PVDD or Ground
    • Status report with I2C and fault pin
    • Start-up/shutdown pop elimination
    • 150mΩ power MOSFETs
    • 80dB PSRR at 100Hz
    • Selectable voltage gain
    • Adjustable power limiter
    • Communicates with MCU via I2C interface
    • Supports 2Ω to 16Ω speakers
    • Available in a QFN-24 (4mm x 4mm) package
    • Available in a Wettable Flank package
    • Available in AEC-Q100 Grade 1

Applications

  • Automotive E-Call systems
  • Telematics systems
  • Infotainment audio
  • Cluster systems

Typical Application Circuit

Application Circuit Diagram - Monolithic Power Systems (MPS) MPQ7795 Audio Amplifiers

Block Diagram

Block Diagram - Monolithic Power Systems (MPS) MPQ7795 Audio Amplifiers

Videos

Related Evaluation Board

Monolithic Power Systems (MPS) EVQ7795-R-00A Evaluation Board

Designed to demonstrate the capabilities of the MPQ7795-AEC1 audio amplifier.

Learn Moreà propos de Monolithic Power Systems (MPS) EVQ7795-R-00A Evaluation Board View Productslié à Monolithic Power Systems (MPS) EVQ7795-R-00A Evaluation Board
Publié le: 2024-03-20 | Mis à jour le: 2024-04-29