TAS2555 5.7W Digital Input Smart Amp with Integrated Speaker Protection, Advanced EQ and 8.5V Class-H Boost | TI.com

TAS2555 (ACTIVE) 5.7W Digital Input Smart Amp with Integrated Speaker Protection, Advanced EQ and 8.5V Class-H Boost

 

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Description

The TAS2555 device is a state-of-the-art Class-D audio amplifier which is a full system on a Chip (SoC). The device features a ultra low-noise audio DAC and Class-D power amplifier which incorporates speaker voltage and current sensing feedback. An on-chip, low-latency DSP supports Texas Instruments SmartAmp speaker protection algorithms to maximizes loudness while maintaining safe speaker conditions.

The device can be used easily with any processor with an I2S output and stereo implementations are possible when using two TAS2555 devices. Separate tuning for different speakers is supported allowing customers to add value while maintaining form factor designs. Additionally, the TAS2555 supports separate voice and audio tuning dynamically with ultra-low 15.9 µV ICN regardless of mode of operation making receiver/speaker implementations possible.

A Class-H boost converter generates the Class-D amplifier supply rail. When the audio signal only requires a lower Class-D output power, the boost improves system efficiency by deactivating and connecting VBAT directly to the Class-D amplifier supply. When higher audio output power is required, the multi-level boost quickly activates tracking the signal to provide the additional voltage to the load.

Features

  • Ultra low-noise mono boosted class-D amplifier
    • 5.7 W at 1% THD+N and 6.9 W at 10% THD+N into 4-Ω load from 4.2-V supply
    • 3.8 W at 1% THD+N and 4.5 W at 10% THD+N into 8-Ω load from 4.2-V supply
  • Output noise for DAC + class-D (ICN) is 15.9 µV
  • DAC + class-D SNR 111 dB at 1%THD+N/8 Ω
  • THD+N – dB at 1 W / 8 Ω with flat frequency response
  • PSRR dB for 200 mVpp ripple at 217 Hz
  • Input sample rates from 8 kHz to 96 kHz
  • Built-in speaker sense
    • Measures speaker current and voltage
    • Measures VBAT voltage, chip temperature
  • Dedicated real-time DSP for speaker protection
    • Thermal and excursion protection
    • Detects speaker leaks and damage
  • High efficiency class-H boost converter with multi-level tracking
    • 86% at 500 mW in 8 Ω with 3.6 V VBAT
    • 87% at 700 mW in 8 Ω with 4.2 V VBAT
  • Configurable automatic gain control (AGC)
    • Limits battery current consumption
  • Adjustable class-D switching edge-rate control
  • Thermal, short-circuit, and under-voltage protection
  • I2S, Left-justified, right-justified, DSP, and TDM input and output interface,
  • I2C or SPI interface for register control
  • Stereo configuration using two TAS2555 devices
  • Power supplies
    • Boost input: 2.9 V to 5.5 V
    • Analog/digital: 1.65 V to 1.95 V
    • Digital I/O: 1.62 V to 3.6 V
  • 42-ball, 0.5-mm pitch, DSBGA package

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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
TAS2555 Order now Digital Input     Class-D Boosted
Smart Amp    
Mono     2.7     5.5     5.7     4     111     0.02     3     I2C
SPI    
Closed     2.95     5.5     96     110     -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    
TAS2553 Order now Analog Input
Digital Input    
Class-D Boosted     Mono     2.7     5.5     2.8     6     94     0.9     7.1     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     I2C
SPI    
Closed     2.9     5.5     96     110     -40 to 85     Catalog    
TAS2559 Order now Digital Input     Class-D Boosted
Smart Amp    
Mono     2.7     5.5     5.7     4     111     0.0035     3.9     I2C
SPI    
Closed     2.9     5.5