MAX98500

Boosted 2.2W Class D Amplifier with Automatic Level Control

High-Efficiency Boosted Amplifier Makes Speakers Louder Without Collapsing the Battery


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Description

The MAX98500 is a high-efficiency Class D audio amplifier that 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 collapse of battery voltage.

The amplifier has differential inputs and an internal fully differential design. The MAX98500 also features three gain settings (6dB, 15.5dB, and 20dB) that are selectable with a logic input.

The MAX98500 is available in a small, 0.5mm pitch 16-bump WLP package (2.1mm x 2.1mm). It is specified over the extended -40°C to +85°C temperature range.
MAX98500: Simplified Block Diagram MAX98500: Simplified Block Diagram Enlarge+

Key Features

  • Boosted Class D Output
  • Integrated Automatic Level Control
  • Output Power
    • 2.2W into 8Ω, 10% THD+N
    • 1.7W into 8Ω, 1% THD+N
  • Wide 2.5V to 5.5V Supply Voltage Range
  • Undervoltage Lockout Protection
  • High Total Efficiency of 87%
  • High Step-Up Switching Frequency (2MHz)
  • Active Emission Limiting for Low EMI

Applications/Uses

  • Active Speaker Accessories
  • Cell Phones
  • GPS Devices
  • Mobile Internet Devices
  • Smartphones

MAX98500EVKIT: Evaluation Kit for the MAX98500

Technical Documents

App Note 5792 Multiplex Boosted Class-D without Additional External Circuitry

Quality and Environmental Data

Product Reliability Reports: MAX98500.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX98500EWE+
  • MAX98500EWE+T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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