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Texas Instruments TAS2780 Digital Input Mono Class-D Audio Amplifier

Texas Instruments TAS2780 Digital Input Mono Class-D Audio Amplifier is optimized to drive high peak power into small loudspeakers efficiently. The Class-D amplifier delivers 25W of continuous power into a 4Ω load with less than 1% THD+N at a supply voltage of 18V. The device’s broad voltage input range and high output power are ideal for battery or line-powered systems.

The TI TAS2780 Digital Input Mono Class-D Audio Amplifier is versatile as a conventional amp or with host-based speaker protection algorithms. The integrated speaker voltage and current sense allow for real-time feedback of loudspeaker conditions to the protection algorithms through a return I²S path.

The TAS2780 Y-Bridge power architecture improves efficiency by internally selecting the supplies for optimal headroom. Furthermore, the brownout prevention scheme with multiple thresholds reduces the signal path gain when the supply drops. Up to eight TAS2780 devices can share a common bus via I²S/TDM and I²C interfaces.

The TAS2780 is housed in a 30-pin HR-QFN package for a compact PCB footprint.

Features

Key features
- 23V Supply for class D output stage
- Y-Bridge multi-level supply architecture
- Spread spectrum control
- Ultrasonic output support up to 40kHz
Output power:
- 25W, 1% THD+N (4Ω, 18V)
- 30W Maximum output power, 10 % THD+N
Efficiency (1% THDN) and power consumption
- 83% at 1W, 4Ω, PVDD = 12V, VBAT1S = 3.8V
- 83% at 1W, 8Ω, PVDD = 18V, VBAT1S = 5V
- 85% at 1W, 4Ω, PVDD = 18V, VBAT1S = 5V
- 89% at 15W, 4Ω, PVDD = 18V, VBAT1S = 5V
- 93% at 15W , 8Ω, PVDD = 18V, VBAT1S = 5V
- <0.5μA in Hardware shutdown mode
Power supplies and management:
- 3V to 23V PVDD
- 2.7V to 5.5V VBAT1S
- 1.8V AVDD
- 1.8V/ 3.3V IOVDD

Interfaces and control:
- SDOUT for Echo cancellation
- I²S/TDM: 8 Channels of 32bits up to 96KSPS
- I²C: Selectable addresses with Fast Mode+
- Inter-chip communication bus
- 44.1kHz 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
- Overpower and low battery protection
- PVDD and VBAT1S Supply tracking limiters
- Thermal foldback
- Post filter feedback
- Output slew rate control

Applications

Laptop and desktop computers
Smart speakers

Tablets and handhelds
Wireless speakers

Texas Instruments TAS2780 Digital Input Mono Class-D Audio Amplifier

Features

Applications

Block Diagram

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