1 Features

Key Features

? 23V Supply for Class D Output Stage

? Y-Bridge Multi-Level Supply Architecture

? Spread Spectrum Control

? Ultrasonic Output Support up to 40 kHz

Output Power:

? 25 W, 1 THD+N (4 Ω, 18 V)

? 30 W Maximum Output Power, 10 THD+N

Efficiency (1 THDN) and Power Consumption

? 83 at 1W, 4 Ω, PVDD = 12 V, VBAT1S = 3.8 V

? 83 at 1W, 8 Ω, PVDD = 18 V, VBAT1S = 5 V

? 85 at 1W, 4 Ω, PVDD = 18 V, VBAT1S = 5 V

? 89 at 15W, 4 Ω, PVDD = 18 V, VBAT1S = 5 V

? 93 at 15W , 8 Ω, PVDD = 18 V, VBAT1S = 5 V

? <0.5 μA in Hardware Shutdown Mode

Power Supplies and Management:

? PVDD: 3 V to 23 V

? VBAT1S: 2.7 V to 5.5 V

? AVDD: 1.8 V

? IOVDD: 1.8 V/ 3.3 V

Interfaces and Control:

? SDOUT for Echo Cancellation

? I2S/TDM: 8 Channels of 32 bits up to 96 KSPS

? I2C: Selectable Addresses with Fast Mode+

? Inter-Chip Communication Bus

? 44.1 kHz to 96 kHz Sample Rates

Integrated Speaker Management, Protection and EMI:

? Real-time IV-Sense for Speaker Protection

? Short and Open Load Protection

? Thermal and Over Current Protection

? Brownout Protection with Power Limiter

? Over Power and Low Battery Protection

? PVDD and VBAT1S Supply Tracking Limiters

? Thermal Foldback

? Post Filter Feedback

? Output Slew Rate Control

2 Applications

? Laptop and Desktop Computers

? Smart Speakers

? Tablets and Handhelds

? Wireless Speakers

3 Description

The TAS2780 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 25 W of continuous power into

a 4 Ω load with less than 1 THD+N at a supply

voltage of 18 V. The broad voltage input range and

the high output power makes this amplifier versatile

enough to work with battery or line powered systems.

The TAS2780 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.

Y-Bridge power architecture improves amplifier

efficiency by internally selecting the supplies for

optimal headroom. Brownout prevention scheme with

multiple thresholds allows reducing the gain in signal

path when the supply drops.

Up to eight TAS2780 devices can share a common

bus via I2S/TDM and I2C interfaces.

The TAS2780 is available in a 30 pin HR-QFN

package for a compact PCB footprint.