TPA3138D2 - 10W 3.5V–14.4V Inductor-Free Stereo Analog Input Class-D Audio Amplifier

The TPA3138D2 is a 10-W/ch, high-efficiency, low-idle-current Class-D stereo audioamplifier. It can drive stereo speakers with a load as low as 3.2-Ω. In the 1SPW mode, it consumesa low idle current of only 21-mA (12-V) and can operate down to 3.5-V, allowing for longer audioplay and improved thermal performance in bluetooth speakers, battery-powered appliances and otherpower-sensitive applications.

Advanced EMI Suppression with Spread Spectrum Control enables the use of inexpensiveferrite bead filters while meeting EMC requirements for system cost reduction.

To further simplify the design, the TPA3138D2 integrates essential protection featuresincluding undervoltage, overvoltage, power limit, short circuit, overtemperature, as well as DCspeaker protection. All of these protections come with automatic recovery.

Customers can leverage every TPA3138D2 feature in existing designs as it is fullypin-to-pin compatible to TI’s TPA3110D2, TPA3136D2 and TPA3136AD2.

• Wide Supply Range 3.5-V to 14.4-V
  • 2 × 10 W into 6-Ω, 1% THD+N, 12-V Supply
  • 1 x 18.5 W into 4-Ω, 10% THD+N, 12-V Supply
  • THD+N : 0.04% at 1 W, 1 kHz input, 6-Ω
• Longer Battery Life for Portable Applications:
  • 20-mA (12-V) Idle Current in 1SPW Mode
  • >90% Class-D Efficiency
• Reduced Solution Size and Cost:
  • Inductor-Free Operation
  • EN55013 and EN55022 EMC Compliant When No Inductors are Used
  • No External Heatsink Required
• Flexible Audio Solution:
  • Single-ended or Differential Analog Inputs
  • Selectable Gain: 20 dB and 26 dB
  • Pop and Click-Free Startup
• 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
• Pin-to-Pin Compatible with TPA3110D2, TPA3136D2 and TPA3136AD2

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