1 Features

1• Supports Multiple Output Configurations

– 2 × 30 W Into a 8-Ω BTL Load at 24 V

(TPA3128D2)

– 2 × 15 W Into a 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

• Multiple Switching Frequencies

– AM Avoidance

– Master and Slave Synchronization

– 300-KHz to 1.2-MHz Switching Frequency

• Feedback Power-Stage Architecture With High

PSRR Reduces PSU Requirements

• Programmable Power Limit

• Parallel BTL Mode and Mono-Channel Mode

Support

• Supports Both Single and Dual Power Supply

Modes

• Integrated Self-Protection Circuits Including

Overvoltage, Undervoltage, Overtemperature, DCDetect,

and Short Circuit With Error Reporting

• Thermally Enhanced Packages

– DAP (32-Pin HTSSOP Pad Down for

TPA3128D2 and TPA3129D2)

2 Applications

• Bluetooth/Wireless Speakers

• Soundbars

• Mini-Micro Component, Docks

• LCD/LED TVs

• Home Theaters

3 Description

The TPA3128D2 and TPA3129D2 have low idle

power loss and helps to extend the battery life of

Bluetooth/Wireless speakers and other batterypowered

audio systems. The high efficiency of the

TPA3128D2 device allows it to do 2 × 30 W without

external heat sink on a dual layer PCB. The high

efficiency of the TPA3129D2 device allows it to do 2

× 15 W without external heat sink on a dual layer

PCB. This device proposed an efficiency boost Mode,

which can dynamically reduced 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 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.