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Texas Instruments TPA3139D2 Inductor-free Class-D Audio Amplifiers

Texas Instruments TPA3139D2 Inductor-free Class-D Audio Amplifiers have a fast turn-on time (15ms) and a MUTE function to quickly power up while avoiding pop. The built-in spread spectrum control scheme efficiently suppresses EMI and enables using ferrite beads instead of inductors for ≤2 x 10W applications.

The Texas Instruments TPA3139D2 Inductor-free Class-D Audio Amplifiers consume a low idle current of only 20mA (12V) and can operate down to 3.5V, allowing for longer audio playback. The TPA3139D2 is offered in a small, 4x4mm2 QFN package, optimizing it for 2-cell or 3-cell battery-powered systems with space constraints.

The device further simplifies the design by integrating essential protection features. These include undervoltage, overvoltage, power limit, short circuit, overtemperature, and DC speaker protection. All of these protections support automatic recovery.

Features

  • 2 × 3W into 8Ω, 1% THD+N, 7.4V supply
  • 2 × 10W into 8Ω, 1% THD+N, 13.5V supply
  • Fast Turn-on time of <15ms
  • Wide supply range of 3.5V to 14.4V
    • Low idle current and small footprint for portable audio applications
      • 4x4mm2 QFN-24 package
      • 20mA (12V) idle current with 1SPW modulation
      • >90% Class-D efficiency
  • Flexible audio solution
    • MUTE signal for fast enable and enable of outputs
    • Single-ended or differential analog inputs
    • Selectable gains of 20dB and 26dB
  • Integrated protections and auto recovery
    • Pin-to-pin, pin-to-ground, and pin-to-power short circuit protection
    • Thermal protection, undervoltage protection, and overvoltage protection
    • Power limiter and DC speaker protection
  • Spread-spectrum modulation reduces EMI emission
  • Reduced solution size and cost
    • EN55022 EMC compliant with ferrite bead filters
    • No external heatsink is required

Applications

  • Mobile, portable radios
  • Notebooks
  • BLUETOOTH® speakers and wireless speakers
  • Smart home appliance
  • TVs and monitors

Simplified Schematic

Schematic - Texas Instruments TPA3139D2 Inductor-free Class-D Audio Amplifiers

Related Development Tool

Texas Instruments TPA3139D2EVM Evaluation Module

Demonstrates the TPA3139D2 10W, stereo, Class-D Audio Amplifiers.

Learn More關於Texas Instruments TPA3139D2EVM Evaluation Module View Products與Texas Instruments TPA3139D2EVM Evaluation Module相關
發佈日期: 2019-11-26 | 更新日期: 2024-02-08