Texas Instruments

TPA3128D2/TPA3129D2 Class-D Amplifiers

Texas Instruments offers the TPA3128D2 and TPA3129D2 2 x 30 W, 2 x 15 W Class-D amplifiers with low idle power dissipation

Image of Texas Instruments' TPA3128D2/TPA3129D2 Class-D AmplifiersTexas Instruments' TPA3128D2 and TPA3129D2 have low idle power loss and helps to extend the battery life of Bluetooth/wireless speakers and other battery-powered audio systems. The high efficiency of the TPA3128D2 device allows it to do 2 x 30 W without external heat sink on a dual layer PCB. The high efficiency of the TPA3129D2 device allows it to do 2 x 15 W without external heat sink on a dual layer PCB. This device proposed an efficiency boost mode, which can dynamically reduce the current ripple of the external LC filter and the idle current.

The TPA31xxD2 advanced oscillator/PLL circuit employs a multiple switching frequency option to avoid AM interferences, which is achieved together with either a 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 over-voltage, under-voltage, and DC protection. Faults are reported back to the processor to prevent devices from being damaged during overload conditions.

Features
  • Supports multiple output configurations
    • 2 x 30 W into an 8 Ω BTL load at 24 V (TPA3128D2)
    • 2 x 15 W into an 8 Ω BTL load at 15 V (TPA3129D2)
  • Wide voltage range: 4.5 V to 26 V
  • Efficient Class-D operation
    • Very low idle current: <23 mA for recommended LC filter configurations
    • Greater than 90% power efficiency combined with low idle loss greatly eliminates need for heat sink
    • Adaptive modulation schemes based on output power
    • Smart amplifier drivers to reduce the requirement for RC snubbers
  • Feedback power-stage architecture with high PSRR reduces PSU requirements
  • Multiple switching frequencies
    • AM avoidance
    • Master and slave synchronization
    • 300 KHz to 1.2 MHz switching frequency
  • Programmable power limit
  • Parallel BTL mode and mono-channel mode support
  • Supports both single and dual power supply modes
  • Integrated self-protection circuits including over-voltage, under-voltage, over-temperature, DC-detect, and short circuit with error reporting
  • Thermally enhanced packages
    • DAP (32-pin HTSSOP pad down for TPA3128D2 and TPA3129D2)
Applications
  • Bluetooth/wireless speakers
  • Soundbars
  • Mini-micro component, docks
  • LCD/LED TVs
  • Home theaters

TPA3128D2/TPA3129D2 Class-D Amplifiers

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
IC AMP CLASS D STER 30W 32HTSSOPTPA3129D2DAPIC AMP CLASS D STER 30W 32HTSSOP319 - Immediate$18.93View Details
IC AMP CLASS D STER 30W 32HTSSOPTPA3128D2DAPIC AMP CLASS D STER 30W 32HTSSOP1031 - Immediate$27.49View Details
IC AMP CLASS D STER 30W 32HTSSOPTPA3128D2DAPRIC AMP CLASS D STER 30W 32HTSSOP1886 - Immediate$23.38View Details
Published: 2017-09-22

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