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MAX98502

Boosted 2.2W Class D Amplifier with Automatic Level Control

Delivers Constant 2.2W Output Power Without Collapsing Battery

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Status Explanations for product status codes

Active: In Production.

Description

The MAX98502 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 MAX98502 also features three gain settings (6dB, 15.5dB, and 20dB) that are selectable with a logic input.

The MAX98502 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.
 

Data Sheet

Download this datasheet in PDF formatDownload Rev 0 (PDF, 2.3MB)
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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
    • 4.1W into 4Ω, 10% THD+N
    • 3.4W into 4Ω, 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
   

Diagram

MAX98502: Simplified Block Diagram
Simplified Block Diagram

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Document Ref.: 19-6145 Rev 0; 2012-01-12
This page last modified: 2012-01-12




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