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Stereo 3.1W Class D Amplifier

Big 3.1W/Channel Power in a Small, 16-Bump 0.4mm WLP

Product Details

The MAX98303 stereo 3.1W Class D amplifier provides Class AB audio performance with Class D efficiency. This device offers five selectable gain settings (6dB, 9dB, 12dB, 15dB, and 18dB) set by a single gain-select input (GAIN).

Active emissions limiting, edge-rate, and overshoot control circuitry greatly reduces EMI. A filterless spread-spectrum modulation scheme eliminates the need for output filtering found in traditional Class D devices. These features reduce application component count.

The IC's 2.0mA at 3.7V, 2.7mA at 5V, quiescent current extends battery life in portable applications.

The IC is available in a 16-bump WLP (1.68mm x 1.68mm x 0.64mm) package specified over the extended -40°C to +85°C temperature range.

Key Features

  • Low Quiescent Current: 2.0mA at 3.7V, 2.7mA at 5V
  • Spread Spectrum and Active Emissions Limiting
  • Five Pin-Selectable Gains
  • Click-and-Pop Suppression
  • Thermal and Overcurrent Protection
  • Low-Current Shutdown Mode
  • Space-Saving, 1.68mm x 1.68mm x 0.64mm, 16-Bump WLP (0.4mm Pitch)

Applications/Uses

  • Cellular Phones
  • MP3 Players
  • Notebook and Netbook Computers
  • Portable Audio Players
  • Tablets
  • VoIP Phones
Parametric specs for Speaker Amplifiers
# Channels 2
Class D
Spkr. Amp. VCC (V) (min) 2.6
Spkr. Amp. VCC (V) (max) 5.5
Spkr. Amp. ICC (mA) (typ) 2
POUT into 4Ω @ 1% THD+N (W) (min) 2.5
POUT into 4Ω @ 10% THD+N (W) (min) 3.1
POUT into 8Ω @ 1% THD+N (W) (min) 1.4
POUT into 8Ω @ 10% THD+N (W) (min) 1.8
Spkr. Amp. Half Pwr. THD+N (%) 0.04
SNR (dB) (A- Weighted) 99.6
PSRR (dB) (min) 78
Package/Pins WLP/16
Budgetary
Price (See Notes)
$0.66 @1k
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Simplified Block Diagram

MAX98303: Typical Application Circuit MAX98303: Typical Application Circuit Zoom icon

Technical Docs

Data Sheet Stereo 3.1W Class D Amplifier Oct 08, 2010

Design & Development

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Description

The MAX98303 evaluation kit (EV kit) is a fully assembled and tested PCB that evaluates the MAX98303 stereo 3.1W Class D amplifier in a 16-bump, 0.4mm pitch wafer-level package (WLP). The EV kit operates from a single 2.6V to 5.5V DC power supply and is capable of delivering 3.1W into a 4Ω load. The EV kit accepts a differential or single-ended audio input and provides differential outputs for the speaker. The device outputs can be connected directly to a speaker load for filterless applications; however, a filter can be added to ease evaluation.

View Details

Features

  • 2.6V to 5.5V Single-Supply Operation
  • Delivers 3.1W Into a 4Ω Load
  • Single-Ended or Differential Audio Input
  • Five Selectable Gains
  • Filterless Operation
  • Optional Class D Output Filters for Ease of Evaluation
  • Low-Power Shutdown Input
  • Fully Assembled and Tested

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Parameters

Key Features

  • Low Quiescent Current: 2.0mA at 3.7V, 2.7mA at 5V
  • Spread Spectrum and Active Emissions Limiting
  • Five Pin-Selectable Gains
  • Click-and-Pop Suppression
  • Thermal and Overcurrent Protection
  • Low-Current Shutdown Mode
  • Space-Saving, 1.68mm x 1.68mm x 0.64mm, 16-Bump WLP (0.4mm Pitch)

Applications/Uses

  • Cellular Phones
  • MP3 Players
  • Notebook and Netbook Computers
  • Portable Audio Players
  • Tablets
  • VoIP Phones

Description

The MAX98303 stereo 3.1W Class D amplifier provides Class AB audio performance with Class D efficiency. This device offers five selectable gain settings (6dB, 9dB, 12dB, 15dB, and 18dB) set by a single gain-select input (GAIN).

Active emissions limiting, edge-rate, and overshoot control circuitry greatly reduces EMI. A filterless spread-spectrum modulation scheme eliminates the need for output filtering found in traditional Class D devices. These features reduce application component count.

The IC's 2.0mA at 3.7V, 2.7mA at 5V, quiescent current extends battery life in portable applications.

The IC is available in a 16-bump WLP (1.68mm x 1.68mm x 0.64mm) package specified over the extended -40°C to +85°C temperature range.

Simplified Block Diagram

MAX98303: Typical Application Circuit MAX98303: Typical Application Circuit Zoom icon

Technical Docs

Data Sheet Stereo 3.1W Class D Amplifier Oct 08, 2010

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal