TAS2770RJQT中文资料德州仪器数据手册PDF规格书

1 Features

• 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 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

• 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

2 Applications

• Laptop Computers

• Bluetooth Speakers

• Home Automation

• Smart Speakers/IoT

3 Description

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 systems

A 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 shutdown

The 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.