TAS5756M_15 Datasheet, PDF (1/104 Pages) Texas Instruments – TAS5756M Digital Input, Closed-Loop Class-D Amplifier With Processing

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Burr-Brown Audio
TAS5756M
SLAS988B – JUNE 2014 – REVISED AUGUST 2015
TAS5756M Digital Input, Closed-Loop Class-D Amplifier With Processing
1 Features
•1 Flexible Audio I/O Configuration
– Supports I²S, TDM, LJ, RJ Digital Input
– 8 kHz to 192 kHz Sample Rate Support
– Stereo Bridge Tied Load (BTL) or Mono
Parallel Bridge Tied Load (PBTL) Operation
– BD Amplifier Modulation
– Supports 3-Wire Digital Audio Interface (No
MCLK required)
• High-Performance Closed-Loop Architecture
(PVDD = 12V, R_SPK = 8 Ω, SPK_GAIN = 20 dBV)
– Idle Channel Noise = 56 µVrms (A-Wtd)
– THD+N = 0.006 % (at 1 W, 1 kHz)
– SNR = 104 A-Wtd (Ref. to THD+N = 1%)
• PurePath™ HybridFlow Processing Architecture
– Several Configurable MiniDSP Programs
(called HybridFlows)
– Download Time <100 ms (typ)
– Advanced Audio Processing Algorithms ⁽²⁾
• Communication Features
– Software Mode Control via I²C Port
– Two Address Select Pins – Up to 4 Devices
• Robustness and Reliability Features
– Clock Error, DC, and Short-Circuit Protection
– Over Temperature and Overcurrent Protection
2 Applications
• LCD, LED TV, and Multi-Purpose Monitors
• Sound Bars, Docking Stations, PC Audio
• Wireless Subwoofers, Bluetooth and Active
Speakers
3 Description
The TAS5756M device is a high-performance, stereo
closed-loop amplifier with integrated audio processor
with architecture. To convert from digital to analog,
the device uses a high performance DAC with Burr-
Brown^® mixed signal heritage. It requires only two
power supplies; one DVDD for low-voltage circuitry
and one PVDD for high-voltage circuitry. It is
controlled by a software control port using standard
I²C communication. In the family, the TAS5756M
uses traditional BD modulation, ensuring low
distortion characteristics. The TAS5754M uses 1SPW
modulation to reduce output ripple current, the
expense of slightly higher distortion.
The unique HybridFlow architecture allows the
system designer to choose from several configurable
DSP programs that are specifically designed for use
in popular audio end equipment such as bluetooth
(BT) speakers, sound bars, docking stations, and
subwoofers. This architecture combines the flexibility
of a fully programmable device with the fast download
time and ease of use of a fixed-function ROM device.
An optimal mix of thermal performance and device
cost is provided in the 90 mΩ r_DS(on) of the output
MOSFETs. Additionally, a thermally enhanced 48-Pin
HTSSOP provides excellent operation in the elevated
ambient temperatures found in modern consumer
electronic devices.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TAS5756M
HTSSOP (48)
12.50 mm × 6.10 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
(2) Please refer to SLAU577 for information regarding Audio
Processing options available via the HybridFlow library.
(3) Tested on TAS5756MDCAEVM.
Serial
Audio In
Serial
Audio Out
Simplified Block Diagram
DVDD
PVDD
Low-Voltage Supply Domain
High Voltage
Supply Domain
HybridFlow
Processing
miniDSP Core
High Performance
Stereo DAC
001100
1101
Closed Loop Stereo
Class D Amplifier
PWM
Power
Modulator Stage
Analog
Audio Out
Software Control Port
I²C Communication
Hardware
Control Port
GPIO/Status
1
Power at 10% THD+N vs PVDD⁽³⁾
50
45
40
35
30
25
20
15
10
5
0
4
Inst Power, Rspk = 8Ÿ
Cont Power, Rspk = 8Ÿ
Inst Power, Rspk = 6Ÿ
Cont Power, Rspk = 6Ÿ
Inst Power, Rspk = 4Ÿ
Cont Power, Rspk = 4Ÿ
6 8 10 12 14 16 18 20 22 24
PVDD (V)
C036
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.