Texas Instruments TAS2770 Mono Class-D Audio Amplifiers

Texas Instruments TAS2770 Digital Input Mono Class-D Audio Amplifiers with Speaker I/V Sense is designed to drive high peak power efficiently into small loudspeakers. Providing 15.4W of peak power, the TAS2770 uses a 4Ω load while maintaining an 11.6W continuously. The device offers this feature using less than 0.03% THD+N at a battery voltage of 12.6V. Real-time monitoring of loudspeaker behavior is achieved through integrated speaker voltage and current sense. Additionally, real-time diagnostic features include over-current, over-temperature, and short circuits. The Texas Instruments TAS2770 headroom is optimized using the battery tracking peak voltage limiter with brownout prevention through the entire charge cycle of 2S or 3S battery systems. Up to eight devices can share two common buses, I²S/TDM and I²C.

Features

High-performance mono Class-D amplifier 20W at 1% THD+N (4Ω, 16V)
- 15.4W at 1% THD+N (4Ω, 12.6V)
- 9.1W at 1% THD+N (8Ω, 12.6V)
- 8.2W at 1% THD+N (4Ω, 8.4V)
- 4W at 1% THD+N (8Ω, 8.4V)
0.03 % THD+N at 1W (4Ω, VBAT = 12.6V)
Spread-spectrum low EMI mode
Thermal and over-current protection
32µV_rms A-weighted idle channel noise
90dB PSRR with 200 mV_PP ripple at 20-20kHz
82.5% efficiency at 1W (4Ω, VBAT = 12.6V)
<1µA HW shutdown VBAT current
42mW/63mW idle dissipation (8.4V/12.6V)
Speaker voltage and current sense
VBAT tracking peak voltage limiter with brownout prevention

Real-time diagnostics using I/V speaker sense
- Overcurrent
- Short circuit (short to power, short to ground, and terminal-to-terminal short)
- Over-temperature
44.1kHz to 192kHz sample rates
Flexible user interfaces
- I²S/TDM: eight channels (32-bit/96kHz)
- I²C: eight selectable addresses
MCLK free operation
Low pop and click
Power supplies
- VBAT: 4.5V to 16V
- AVDD: 1.8V