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.