50-W Stereo (BTL) Class-D Audio Amp w/ SpeakerGuard™



The TPA31xxD2 series are stereo efficient, digital amplifier power stage for driving speakers up to 100 W / 2 Ω in mono. The high efficiency of the TPA3130D2 allows it to do 2 × 15 W without external heat sink on a single layer PCB. The TPA3118D2 can even run 2 × 30 W / 8 Ω without heat sink on a dual layer PCB. If even higher power is needed the TPA3116D2 does 2 × 50 W / 4 Ω with a small heat-sink attached to its top side PowerPAD. All three devices share the same footprint enabling a single PCB to be used across different power levels.

The TPA31xxD2 advanced oscillator/PLL circuit employs a multiple switching frequency option to avoid AM interferences; this is achieved together with an option of either master or slave option, making it possible to synchronize multiple devices.

The TPA31xxD2 devices are fully protected against faults with short-circuit protection and thermal protection as well as overvoltage, undervoltage, and DC protection. Faults are reported back to the processor to prevent devices from being damaged during overload conditions.


  • Supports Multiple Output Configurations
    • 2 × 50 W Into a 4-Ω BTL Load at 21 V
    • 2 × 30 W Into a 8-Ω BTL Load at 24 V
    • 2 × 15 W Into a 8-Ω BTL Load at 15 V
  • Wide Voltage Range: 4.5 V to 26 V
  • Efficient Class-D Operation
    • >90% Power Efficiency Combined With Low
      Idle Loss Greatly Reduces Heat Sink Size
    • Advanced Modulation Schemes
  • Multiple Switching Frequencies
    • AM Avoidance
    • Master and Slave Synchronization
    • Up to 1.2-MHz Switching Frequency
  • Feedback Power-Stage Architecture With High
    PSRR Reduces PSU Requirements
  • Programmable Power Limit
  • Differential and Single-Ended Inputs
  • Stereo and Mono Mode With Single-Filter Mono
  • Single Power Supply Reduces Component Count
  • Integrated Self-Protection Circuits Including
    Overvoltage, Undervoltage, Overtemperature, DC-
    Detect, and Short Circuit With Error Reporting
  • Thermally Enhanced Packages
    • DAD (32-Pin HTSSOP Pad Up)
    • DAP (32-Pin HTSSOP Pad Down)
  • –40°C to 85°C Ambient Temperature Range

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Parametrics Compare all products in Analog Input Amplifiers

Power to Bridge Tied Load (Max) (W)
Power to Parallel Bridge Tied Load (Max) (W)
Supported Bridge Tied Load (Min) (Ohms)
Closed/Open Loop
Speaker Outputs (Max) (#)
Input Type
Power Stage Supply (Max) (V)
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
Approx. Price (US$)
-40 to 85   
32HTSSOP: 89 mm2: 8.1 x 11(HTSSOP)   
1.55 | 1ku   

Other qualified versions of TPA3116D2

Version Part Number Definition
Automotive TPA3116D2-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects