TAS5751M Datasheet, PDF (1/70 Pages) Texas Instruments – Digital Input Audio Power Amplifier

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TAS5751M
SLASEC1A – MARCH 2016 – REVISED MARCH 2016
TAS5751M - Digital Input Audio Power Amplifier with EQ and 3-Band AGL
1 Features
•1 Audio Input/Output
– One-Stereo Serial Audio Input
– Supports 44.1-kHz and 48-kHz Sample Rates
(LJ/RJ/I²S)
– Supports 3-Wire I²S Mode (no MCLK required)
– Automatic Audio Port Rate Detection
– Supports BTL and PBTL Configuration
– P_OUT = 25 W @ 10% THD+N
– PVDD = 20 V, 8 Ω, 1 kHz
• Audio/PWM Processing
– Independent Channel Volume Controls With
Gain of 24 dB to Mute in 0.125-dB Steps
– Programmable Three-Band Automatic Gain
Limiting (AGL)
– 20 Programmable Biquads for Speaker EQ
and Other Audio-Processing Features
• General Features
– 106-dB SNR, A-Weighted, Referenced to Full
Scale (0 dB)
– I²C Serial Control Interface w/ two Addresses
– Thermal, Short-Circuit, and Undervoltage
Protection
– Up to 90% Efficient
– AD, BD, and Ternary Modulation
– PWM Level Meter
Power vs PVDD
45
RL = 4 Ω
40
RL = 8 Ω
35
30
25
20
15
10
5
Current Sourcing Limit
EVM Thermal Limit
0
8
12
16
20
24
PVDD (V)
2 Applications
• LCD TV, LED TV
• Low-Cost Audio Equipment
3 Description
The TAS5751M device is an efficient, digital-input
audio amplifier for driving stereo speakers configured
as a bridge tied load (BTL). In parallel bridge tied
load (PBTL) in can produce higher power by driving
the parallel outputs into a single lower impedance
load. One serial data input allows processing of up to
two discrete audio channels and seamless integration
to most digital audio processors and MPEG
decoders. The device accepts a wide range of input
data and data rates. A fully programmable data path
routes these channels to the internal speaker drivers.
The TAS5751M device is a slave-only device
receiving all clocks from external sources. The
TAS5751M device operates with a PWM carrier
between a 384-kHz switching rate and a 288-kHz
switching rate, depending on the input sample rate.
Oversampling combined with a fourth-order noise
shaper provides a flat noise floor and excellent
dynamic range from 20 Hz to 20 kHz.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TAS5751M
HTSSOP (48) 12.50 mm × 6.10 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Block Diagram
DVDD AVDD
PVDD
MCLK
LRCK
SCLK
SDIN
MCLK Monitoring
and Watchdog
Power-On Reset
(POR)
Serial Audio Port
(SAP)
Sample Rate
Auto-Detect
PLL
Digital Audio
Processor
(DAP)
Internal Regulation and Power Distribution Internal Voltage Supplies
Sample Rate
Converter
(SRC)
Digital to PWM
Converter
(DPC)
2 Ch. PWM
Modulator
Noise Shaping
Click & Pop
Suppression
Open Loop Stereo
Stereo PWM Amplifier
Sensing & Protection
Temperature
Short Circuits
PVDD Voltage
Output Current
Fault Notification
AMP_OUT_A
AMP_OUT_B
AMP_OUT_C
AMP_OUT_D
Internal Register/State Machine Interface
I²C Control Port
SCL SDA DR_SD PDN RST
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.