TAS2770 20W Digital Input Smart Amp with I/V Sense for Speaker Protection and 4.5-18V Supply Voltage Range | TI.com

TAS2770
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20W Digital Input Smart Amp with I/V Sense for Speaker Protection and 4.5-18V Supply Voltage Range

20W Digital Input Smart Amp with I/V Sense for Speaker Protection and 4.5-18V Supply Voltage Range - TAS2770
Datasheet
TAS2770 20-W Digital Input Mono Class-D Audio Amplifier with Speaker I/V Sense datasheet (Rev. B)
 

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Description

The TAS2770 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 15.4 W of peak power into a 4-Ω load while sustaining 11.6 W continuously with less than 0.03 % THD+N at a battery voltage of 12.6 V.

Integrated speaker voltage and current sense provides for real time monitoring of loudspeaker behavior. A battery tracking peak voltage limiter with brown out prevention optimizes amplifier headroom over the entire charge cycle of 2S or 3S battery systems.

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.

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)
    • 9.1-W at 1 % THD+N (8 Ω, 12.6 V)
    • 7.1-W at 1 % THD+N (4 Ω, 8.4 V)
    • 4-W at 1 % THD+N (8 Ω, 8.4 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

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Parametrics

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Part number Order Audio input type Architecture Speaker channels (Max) Power stage supply (Min) (V) Power stage supply (Max) (V) Output power (W) Load (Min) (ohms) SNR (dB) THD + N @ 1 kHz (%) Iq (Typ) (mA) Control interface Closed/open loop Analog supply (Min) (V) Analog supply (Max) (V) Sampling rate (Max) (kHz) PSRR (dB) Operating temperature range (C) Rating
TAS2770 Order now Digital Input     Class-D
Smart Amp    		 Mono     4.5     16     20     4     108     0.007     7.07     I2C     Closed     4.5     16     192     90     -40 to 85     Catalog    
TAS2110 Order now Digital Input     Class-D Boosted     Mono     2.7     5.5       3.2     109.5     0.004       I2C     Closed     2.7     5.5       100     -40 to 85     Catalog    
TAS2505 Order now Analog Input
Digital Input    		 Class-D     Mono     1.5     1.95     2     4     94     0.012     0.002     I2C
SPI    		 Open     1.5     1.95     96     47.2     -40 to 85     Catalog    
TAS2552 Order now Analog Input
Digital Input    		 Class-D Boosted
Smart Amp    		 Mono     2.7     5.5     4     6     94     0.1     6.54     I2C     Closed     2.7     5.5     192     75     -40 to 85     Catalog    
TAS2557 Order now Digital Input     Class-D Boosted
Smart Amp    		 Mono     2.7     5.5     5.7     4     111     0.0035     3.9