The TPA3156D2 has 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 TPA3156D2 device allows it to do 2 × 70 W with external heat sink on a dual layer PCB. This device integrates an efficiency boost mode, which dynamically reduces the current ripple of the external LC filter and the idle current .
The TPA3156D2 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 TPA3156D2 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.
| Audio input type | Analog Input |
| Architecture | Class-D |
| Speaker channels (max) | Stereo |
| Rating | Catalog |
| Power stage supply (max) (V) | 26 |
| Power stage supply (min) (V) | 4.5 |
| Load (min) (Ω) | 2 |
| Output power (W) | 70 |
| SNR (dB) | 102 |
| THD + N at 1 kHz (%) | 0.1 |
| Iq (typ) (mA) | 17 |
| Control interface | Hardware |
| Closed/open loop | Closed |
| Analog supply (min) (V) | 4.5 |
| Analog supply voltage (max) (V) | 26 |
| PSRR (dB) | 70 |
| Operating temperature range (°C) | -40 to 85 |
| HTSSOP (DAD) | 32 | 89.1 mm² 11 x 8.1 |
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