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Analog Devices / Maxim Integrated MAX98502 Class D Audio Amplifier

Analog Devices MAX98502 Class D Audio Amplifier features an integrated boost converter to deliver a constant output power over a wide range of battery supply voltages. The boost converter operates at 2MHz, requiring only a small (2.2µH) external inductor and capacitor. The automatic level control has a battery tracking function that reduces the output swing as the supply voltage drops, preventing the collapse of battery voltage. The amplifier has differential inputs and an internal fully differential design. The Analog Devices MAX98502 Class D Audio Amplifier also features three gain settings (6dB, 15.5dB, and 20dB) that are selectable with a logic input. 

Features

  • Boosted class D output
  • Output power
    • 2.2W into 8I, 10% THD+N
    • 1.7W into 8I, 1% THD+N
    • 4.1W into 4I, 10% THD+N
    • 3.4W into 4I, 1% THD+N
  • Wide 2.5V to 5.5V supply voltage range
  • Undervoltage lockout protection
  • 87% total efficiency 
  • 2MHz step-Up switching frequency
  • Active emission limiting for low EMI
  • Integrated automatic level control

Applications

  • Cell phones
  • Smartphones
  • GPS Devices
  • Mobile internet devices
  • Active speaker accessories

Block Diagram

Block Diagram - Analog Devices / Maxim Integrated MAX98502 Class D Audio Amplifier

Development Tool

Publicado: 2013-02-15 | Actualizado: 2023-04-13