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TAS2555YZT Datasheet(PDF) 1 Page - Texas Instruments

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Part # TAS2555YZT
Description  Class-D Mono Audio Amplifier
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TAS2555YZT Datasheet(HTML) 1 Page - Texas Instruments

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OUT-
OUT+
VBOOST
SW
Ferrite bead
(optional)
VREG
VSENSE-
VSENSE+
Ferrite bead
(optional)
To Speaker
+
-
/RESET
I2S
4
2
I2C
C1
2
VBAT
MCLK
TAS2555
C2
L1
2
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
TAS2555
SLASE98A – AUGUST 2015 – REVISED AUGUST 2015
TAS2555 5.7-W Class-D Mono Audio Amplifier with Class-H Boost and Speaker Sense
1 Features
3 Description
The TAS2555 is a state-of-the-art Class-D audio
1
Ultra Low-Noise Mono Boosted Class-D Amplifier
amplifier which is a full system on a Chip (SoC). The
5.7 W at 1% THD+N and 6.9 W at 10%
device features a ultra low-noise audio DAC and
THD+N into 4-
Ω Load from 4.2-V Supply
Class-D power amplifier which incorporates speaker
3.8 W at 1% THD+N and 4.5 W at 10%
voltage and current sensing feedback. An on-chip,
low-latency
DSP
supports
Texas
Instruments
THD+N into 8-
Ω Load from 4.2-V Supply
SmartAmp
speaker
protection
algorithms
to
Output Noise for DAC + Class-D(ICN) is 15.9 µV
maximizes loudness while maintaining safe speaker
DAC + Class-D SNR 111 dB at 1%THD+N/8
Ω
conditions.
THD+N –90 dB at 1 W / 8
Ω with Flat Frequency
The device can be used easily with any processor
Response
with an I2S output and stereo implementations are
PSRR 110 dB for 200 mVpp ripple at 217 Hz
possible when using two TAS2555 devices. Separate
tuning for different speakers is supported allowing
Input Sample Rates from 8 kHz to 96 kHz
customers to add value while maintaining form factor
Built-In Speaker Sense
designs. Additionally, the TAS2555 supports separate
Measures Speaker Current and Voltage
voice and audio tuning dynamically with ultra-low 15.9
Measures VBAT Voltage, Chip Temperature
µV ICN regardless of mode of operation making
receiver/speaker implementations possible.
Dedicated Real-Time DSP for Speaker Protection
A Class-H boost converter generates the Class-D
Thermal and Excursion Protection
amplifier supply rail. When the audio signal only
Detects Leak and Damaged Speaker
requires a lower Class-D output power, the boost
High Efficiency Class-H Boost Converter With
improves system efficiency by deactivating and
Multi-Level Tracking
connecting VBAT directly to the Class-D amplifier
supply. When higher audio output power is required,
86% at 500 mW in 8
Ω with 3.6 V VBAT
the multi-level boost quickly activates tracking the
87% at 700 mW in 8
Ω with 4.2 V VBAT
signal to provide the additional voltage to the load.
Built-In Automatic Gain Control (AGC)
Limits Battery Current Consumption
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
Adjustable Class-D Switching Edge-Rate Control
TAS2555
WCSP (42)
3.47 mm x 3.23 mm
Power Supplies
(1) For all available packages, see the orderable addendum at
Boost Input: 2.9 V to 5.5 V
the end of the data sheet.
Analog/Digital: 1.65 V to 1.95 V
Digital I/O: 1.62 V to 3.6 V
Simplified Schematic
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
3.47 mm x 3.23 mm, 0.5 mm pitch, 42-ball WCSP
Stereo Configuration Using Two TAS2555
Devices
2 Applications
Mobile Phones
Tablets
Portable Audio Docks
Bluetooth Speakers
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.


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