Texas Instruments' TAS2770 is a mono, digital input Class-D audio amplifier optimized for efficiently driving high peak power into small loudspeakers. The Class-D amplifier is capable of delivering 15.4 W of peak power into a 4 Ω load while sustaining 11.6 W continuously with less than 0.03 % THD+N at a battery voltage of 12.6 V.
Integrated speaker voltage and current sense provides for real-time monitoring of loudspeaker behavior. A battery tracking peak voltage limiter with brown out prevention optimizes amplifier headroom over the entire charge cycle of 2S or 3S battery systems.
Up to eight devices can share a common bus via either I2S/TDM + I2C.
The TAS2770 device is available in a 26-pin, 0.4 mm pitch QFN for a compact PCB footprint.
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- High-performance mono Class-D amplifier
- 20 W at 1% THD+N (4 Ω, 16 V)
- 15.4 W at 1% THD+N (4 Ω, 12.6 V)
- 9.1 W at 1% THD+N (8 Ω, 12.6 V)
- 8.2 W at 1% THD+N (4 Ω, 8.4 V)
- 4 W at 1% THD+N (8 Ω, 8.4 V)
- 0.03% THD+N at 1 W (4 Ω, VBAT = 12.6 V)
- 32 µVRMS a-weighted idle channel noise
- 90 dB PSRR with 200 mVPP ripple at 20 - 20 kHz
- 82.5% efficiency at 1 W (4 Ω, VBAT = 12.6 V)
- <1 µA HW shutdown VBAT current
- 42 mW/63 mW idle dissipation (8.4 V/12.6 V)
- Speaker voltage and current sense
- VBAT tracking peak voltage limiter with brown-out prevention
- 44.1 kHz to 192 kHz sample rates
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- Real-time diagnostics using I/V speaker sense
- Overcurrent
- Short-circuit (short-to-power, short-to-ground, and terminal-to-terminal short)
- Overtemperature
- Flexible user interfaces
- I2S/TDM: eight channels (32-bit/96 kHz)
- I2C: eight selectable addresses
- MCLK free operation
- Low pop and click
- Power supplies
- VBAT: 4.5 V to 16 V
- AVDD: 1.8 V
- Spread-spectrum low EMI mode
- Thermal and overcurrent protection
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| Applications |
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- Laptop computers
- Bluetooth speakers
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- Home automation
- Smart speakers/IoT
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