TAS5754M Datasheet, PDF (1/127 Pages) Texas Instruments – Digital Input, Closed-Loop Class-D Amplifier

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TAS5754M
SLAS987 – JUNE 2014
Digital Input, Closed-Loop Class-D Amplifier with HybridFlow 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 Modulation with TAS5756M, 1SPW
Modulation with TAS5754M
– Supports 3-Wire Digital Audio Interface (No
MCLK required)
• High Performance Closed-Loop Architecture
(PVDD = 12V, R_SPK = 8 Ω, SPK_GAIN = 20dBV)
– Idle Channel Noise = 62 µVrms (A-Wtd)
– THD+N = 0.007 % (at 1 W, 1 kHz)
– SNR = 103 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
• 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
Figure 1. Simplified Block Diagram
DVDD
PVDD
Serial
Audio In
Serial
Audio Out
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
3 Description
The TAS5754M device is a high-performance, stereo
closed-loop amplifier with integrated audio processor
with PurePath™ HybridFlow architecture. To convert
from digital to analog, it 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 via 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, reducing the idle current draw at
the expense of slightly higher distortion.
The unique HybridFlow architecture allows the
system designer to choose from several configurable
DSP programs, specifically designed for use in
popular audio end equipment such as bluetooth (BT)
speakers, sound bars, docking stations, and
subwoofers. This 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-
Terminal TSSOP provides excellent operation in the
elevated ambient temperatures found in modern
consumer electronic devices.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TAS5754M
TSSOP (48)
12.05 mm × 6.10 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Figure 2. Power at 10% THD+N vs PVDD
50
Inst Power, Rspk = 8Ÿ
45
Cont Power, Rspk = 8Ÿ
Inst Power, Rspk = 6Ÿ
40
Cont Power, Rspk = 6Ÿ
35
Inst Power, Rspk = 4Ÿ
Cont Power, Rspk = 4Ÿ
30
25
20
15
10
5
0
4 6 8 10 12 14 16 18 20 22 24
PVDD (V)
C036
Note: Tested on TAS5754M-56MEVM.
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.