TPA3128D2/TPA3129D2 Class-D Amplifiers

Texas 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.