TAS2770 Texas instruments

TAS2770

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TAS2770

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Описание

The TAS2770 is a mono, digital input Class-D audio amplifier optimized for efficiently driving small loudspeakers . The output power, protection features and packages make TAS2770 a good choice for Smart speakers, Bluetooth speakers, home automation devices, Notebook computers and tablets.The Class-D amplifier is capable of delivering 20W of continuous power into a 4-Ω load at 16V and 15W into an 8-Ω load at 16V both at 1% THD. The broad voltage input range of 4.5-16V and the high output power makes this amplifier versatile enough to work with battery power or with line powered systemsA Brown-Out preventer tracks peak voltage and automatically self-limits the gain to the voltage available. This hardware implemented feature reduces the amplifier’s demand on system power preventing both audio cut out and system shutdownThe TAS2770 can be used as a conventional amp or with host based speaker protection algorithms. The integrated speaker voltage and current sense provides for real time feedback of loudspeaker conditions to the protection algorithms through a return I2S path.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.

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)
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 mV_PP 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
Real-Time Diagnostics Using I/V Speaker Sense
- Over Current
- Short Circuit(short to power, short to ground and terminal-to-terminal short)
- Over-Temperature
VBAT Tracking Peak Voltage Limiter with Brown Out Prevention
44.1-kHz to 192-kHz Sample Rates
Flexible User Interfaces
- I²S/TDM: 8 Channels (32-bit / 96 kHz)
- I²C: 8 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 Over Current Protection

Audio input type	Digital Input
Architecture	Class-D, Smart Amp
Speaker channels (max)	Mono
Rating	Catalog
Power stage supply (max) (V)	16
Power stage supply (min) (V)	4.5
Load (min) (Ω)	4
Output power (W)	20
SNR (dB)	108
THD + N at 1 kHz (%)	0.007
Iq (typ) (mA)	7.07
Control interface	I2C
Closed/open loop	Closed
Analog supply (min) (V)	4.5
Analog supply (max) (V)	16
Sampling rate (max) (kHz)	192
PSRR (dB)	90
Operating temperature range (°C)	-40 to 85