Digital Input 2.8 W Class-D Audio With Class-D Boost And Speaker Sense - TAS2553

TAS2553 (ACTIVE)

Digital Input 2.8 W Class-D Audio With Class-D Boost And Speaker Sense

 

Description

The TAS2553 is a high efficiency Class-D audio power amplifier with advanced battery current management and an integrated Class-G boost converter. The device constantly measures the current and voltage across the load and provides a digital stream of this information.

The Class-G boost converter generates the Class-D amplifier supply rail. During low Class-D output power, the boost improves efficiency by deactivating and connecting VBAT directly to the Class-D amplifier supply. When high power audio is required, the boost quickly activates to provide significantly louder audio than a stand-alone amplifier connected directly to the battery.

The AGC automatically adjusts Class-D gain to reduce battery current at end-of-charge voltages, preventing output clipping, distortion and early system shutdown. The fixed gain is adjustable via I2C. The gain range is –7 dB to +24 dB in 1 dB steps.

In addition to a differential mono analog input, the TAS2553 has built-in a 16-bit D/A converter used with a digital input. Moving the D/A converter from the digital host processor into the integrated amplifier process provides better dynamic performance at lower system cost. Additionally, since the PCB routing is digital rather than analog, sensitivity to external perturbations such as GSM frame-rate noise is decreased at the system level.

Features

  • Analog or Digital Input Mono Boosted Class-D Amplifier
  • 2.8 W into 8 Ω Load from 3.6 V Supply (1% THD+N)
  • Efficiency of 86% at Rated Power
  • I2S, Left-Justified, Right-Justified, DSP, PDM, and TDM
    Input and Output Interface
  • Input Sample Rates from 8 kHz to 192 kHz
  • High Efficiency Class-G Boost Converter
    • Automatically Adjusts Class-D Supply
  • Built-In Speaker Sense
    • Measures Speaker Current and Voltage
    • Measures VBAT and VBOOST Voltages
  • Built-In Automatic Gain Control (AGC)
    • Limits Battery Current Consumption
  • Adjustable Class-D Switching Edge-Rate Control
  • Power Supplies
    • Boost Input: 3.0 V to 5.5 V
    • Analog: 1.65 V to 1.95 V
    • Digital I/O: 1.5 V to 3.6 V
  • Thermal and Short-Circuit Protection
  • I2C Interface for Register Control
  • Stereo Configuration Using Two TAS2553s
    • I2C Address Select Terminal (ADDR)
  • 2.855 mm × 2.575 mm, 0.4 mm Pitch 30-Ball WCSP

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Parametrics Compare all products in Speaker Amplifier Class AB/Class D

 
Analog Supply (V) (Min)
Analog Supply (V) (Max)
Architecture
Speaker Channels (Max)
Audio Input Type
Output Power (W)
Load (Min) (ohms)
Iq (Typ) (mA)
Iq (Max) (mA)
THD + N @ 1 kHz (%)
PSRR (dB)
Iq per channel (Typ) (mA)
Pin/Package
Package Size: mm2:W x L (PKG)
Operating Temperature Range (C)
Control Interface
Shutdown Current (ISD) (uA)
Rating
TAS2553 TAS2552 TAS2555 TAS2557 TAS2559 TAS2560
2.7    2.7    2.95    2.9    2.9    2.9   
5.5    5.5    5.5    5.5    5.5    5.5   
Class D Boosted    Class D Boosted
Smart Amp   
Class D Boosted
Smart Amp   
Class D Boosted
Smart Amp   
Class D Boosted
Smart Amp   
Class D Boosted
Smart Amp   
Mono    Mono    Mono    Mono    Mono    Mono   
Analog Input
Digital Input   
Analog Input
Digital Input   
Digital Input    Digital Input    Digital Input    Digital Input   
2.8    4    5.7    5.7    5.7    5.6   
6    6    4    4    4    4   
7.1    6.54    3    3.9    3.9    3.2   
8.03    8.34    20    6.7    6.7    10.6   
0.9    0.1    0.02    0.0035    0.0035    0.004   
75    75    110    110    110    110   
7.1    6.54    3    3.9    3.9    3.2   
30DSBGA    30DSBGA          30DSBGA   
See datasheet (DSBGA)    See datasheet (DSBGA)          See datasheet (DSBGA)   
-40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85   
I2C    I2C    I2C
SPI   
I2C
SPI   
I2C
SPI   
I2C   
0.2    0.2    0.1    2    1    0.1   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   

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