TAS2781 Series

25 W, 4.5-V to 23-V, digital-input integrated-audio-processing speaker-protection class-D amplifier

Catalog

25 W, 4.5-V to 23-V, digital-input integrated-audio-processing speaker-protection class-D amplifier

Part	Mounting Type	Type	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply [Max]	Voltage - Supply [Min]	Supplier Device Package	Output Type
Texas Instruments TAS2781RYYR	Surface Mount	Class D	85 °C	-40 °C	1.95 V 3.6 V 5.5 V 24 V	1.65 V 2.7 V 3 V	30-VQFN-HR (4x3.5)	1-Channel (Mono)

Catalog

25 W, 4.5-V to 23-V, digital-input integrated-audio-processing speaker-protection class-D amplifier

Key Features

• Integrated DSP for audio processing24-V Supply for class-d output stageY-Bridge multi-level supply architectureHybrid-pro external boost control algorithmUltrasonic output support up to 40 kHz25 W, 1% THD+N (4 Ω, 18 V)30 W Maximum output power, 10% THD+N82% at 1W, 4 Ω, PVDDH = 12 V, PVDDL = 3.8 V83% at 1W, 8 Ω, PVDDH = 18 V, PVDDL = 5 V84% at 1W, 4 Ω, PVDDH = 18 V, PVDDL = 5 V90% at 15W, 4 Ω, PVDDH = 18 V, PVDDL = 5 V93% at 15W , 8 Ω, PVDDH = 18 V, PVDDL = 5 V<0.5 µA in Hardware Shutdown ModeAVDD: 1.8 VIOVDD: 1.8 V/ 3.3 VPVDDL: 2.7 V to 5.5 VPVDDH: 3 V to 24 VSDOUT for echo cancellationI 2S/TDM: 8 channels of 32 bits up to 192 KSPSI 2C with fast mode+ or SPIInter-chip communication bus16 kHz to 192 kHz sample ratesReal-time IV-sense for speaker protectionDynamic range compressorBrownout protection with power limiterMulti-channel balancing communicationOver power and low battery protectionPVDDH/ PVDDL supply tracking limitersThermal and over current protectionsThermal foldbackPost filter feedback and slew rate controlIntegrated DSP for audio processing24-V Supply for class-d output stageY-Bridge multi-level supply architectureHybrid-pro external boost control algorithmUltrasonic output support up to 40 kHz25 W, 1% THD+N (4 Ω, 18 V)30 W Maximum output power, 10% THD+N82% at 1W, 4 Ω, PVDDH = 12 V, PVDDL = 3.8 V83% at 1W, 8 Ω, PVDDH = 18 V, PVDDL = 5 V84% at 1W, 4 Ω, PVDDH = 18 V, PVDDL = 5 V90% at 15W, 4 Ω, PVDDH = 18 V, PVDDL = 5 V93% at 15W , 8 Ω, PVDDH = 18 V, PVDDL = 5 V<0.5 µA in Hardware Shutdown ModeAVDD: 1.8 VIOVDD: 1.8 V/ 3.3 VPVDDL: 2.7 V to 5.5 VPVDDH: 3 V to 24 VSDOUT for echo cancellationI 2S/TDM: 8 channels of 32 bits up to 192 KSPSI 2C with fast mode+ or SPIInter-chip communication bus16 kHz to 192 kHz sample ratesReal-time IV-sense for speaker protectionDynamic range compressorBrownout protection with power limiterMulti-channel balancing communicationOver power and low battery protectionPVDDH/ PVDDL supply tracking limitersThermal and over current protectionsThermal foldbackPost filter feedback and slew rate control

Description

The TAS2781 is a mono, digital input Class-D audio amplifier optimized for efficiently driving high peak power into 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. An on-chip DSP supports Texas Instruments Smart Amp speaker protection algorithm. The integrated speaker voltage and current sense provides for real-time monitoring of loudspeakers. Y-Bridge power architecture improves amplifier efficiency by internally selecting the supplies for optimal headroom. Brownout prevention scheme with adjustable threshold allows reducing the gain in signal path when the supply drops. The Hybrid-Pro algorithm allows user to optimize efficiency and improve battery life by controlling the external power supply. Up to eight TAS2781 devices can share a common bus via I 2S/TDM and I 2C/SPI interfaces. The TAS2781 is available in a 30 pin HR-QFN package for a compact PCB footprint. The TAS2781 is a mono, digital input Class-D audio amplifier optimized for efficiently driving high peak power into 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. An on-chip DSP supports Texas Instruments Smart Amp speaker protection algorithm. The integrated speaker voltage and current sense provides for real-time monitoring of loudspeakers. Y-Bridge power architecture improves amplifier efficiency by internally selecting the supplies for optimal headroom. Brownout prevention scheme with adjustable threshold allows reducing the gain in signal path when the supply drops. The Hybrid-Pro algorithm allows user to optimize efficiency and improve battery life by controlling the external power supply. Up to eight TAS2781 devices can share a common bus via I 2S/TDM and I 2C/SPI interfaces. The TAS2781 is available in a 30 pin HR-QFN package for a compact PCB footprint.