TAS5755M Datasheet, PDF (1/76 Pages) Texas Instruments – 2 x 50-W or 2 x 19-W+1 x 50-W Digital Input Audio Amplifier With Equalizer, 2- Band DRC, And License-Free 3D Effect

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TAS5755M
SLOS982 – AUGUST 2017
TAS5755M 2 × 50-W or 2 × 19-W + 1 × 50-W Digital Input Audio Amplifier With Equalizer, 2-
Band DRC, And License-Free 3D Effect
1 Features
•1 2 × 19 W + 1 × 50 W in 2.1 Mode (4 Ω SE, 6 Ω
BTL, PVDD = 24 V, 1 kHz)
• 2 × 50 W in 2.0 Mode (6 Ω, PVDD = 24 V, 1 kHz)
• 2.1 Mode, 2.0 Mode, and Mono Mode
Configurations
• PVDD range: 8 to 26.4 V
• RDSON ≤ 80 mΩ
• 6-A Current Sourcing Capability
• Pre-Filter PBTL
• Audio Performance Features (PVDD = 18 V)
– THD+N ≤ 0.1% @ 1 kHz (RSPK = 8 Ω, POUT
= 1 W)
– ICN ≤ 50 µVRMS
– Crosstalk ≤ - 67 dB
– SNR ≥ 104 dB (A-weighted)
• 2 × 8 BiQuad for L/R
• 1 × 2 BiQuad for Sub
• Two Assignable Log-Style DRC for L/R or L/R/Sub
• License-Free 3D Effects
• DC Blocking Filter
• Thermal, Short-circuit, and Undervoltage
Protection
• Pad-Up for Maximum Thermal Performance with a
Heat Sink
• AD/BD Modulation
• Automatic Rate Detection
2 Applications
• HDTV, UHDTV
• Low-Cost Sound Bars
• Desktop PC Audio Systems
• General Purpose Audio Equipment
3 Description
The TAS5755M is functionally equivalent to the
TAS5731M, but in a Pad-Up design that allows the
device to create more power without experience a
shutdown due to thermal limitations of a pad-down
device.
Like the TAS5731M, the TAS5755M is a very flexible
device, offering output configuration support for 2.1,
2.0, and mono applications. Single chip 2.1 is
accomplished by running each of the Left and Right
Speaker from an independent half-bridge and the
subwoofer from a dedicated full-bridge.
Oversampling, combined with a fourth-order noise
shaper, provides a flat noise floor and excellent
dynamic range from 20 Hz to 20 kHz.
A powerful output stage made up of 80-mΩ output
MOSFETs coupled with a pad-up design to allow the
use of a heatsink, enables the device to make as
much as 2 × 50 W for a 6-Ω load. Conversely, in
mono mode, it can make as much as 1 × 70 W
continuously with a 4-Ω load.
Audio processing for the device consists of Stereo,
Mono, and 2.1 signal mixing, as well as DC blocking
filters, 8 BiQuads for L and R and 2 Biquads for the
subwoofer channel. In addition to equalization, power
limiting is accomplished by a two band Log-style
DRC. A separate single band DRC is provided for the
subwoofer.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TAS5755M
DFD
14 mm × 6.1 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Efficiency vs Total Output Power
100
90
80
70
60
50
40
30
20
10
0
0
BTL Mode
RL = 6 :
TA = 25qC
PVDD = 12 V
PVDD = 18 V
PVDD = 24 V
20
40
60
Output Power (W)
80
D0E1f08fi
Efficiency_vs_OutputPower_6R.grf
Output Power vs Supply Voltage
80
THD = 1%, RL = 4 :
THD = 10%, RL = 4 :
60
THD = 1%, RL = 6 :
THD = 10%, RL = 6 :
40
20
BTL Mode
TA = 25 qC
0
8
13
18
23
26.4
Supply Voltage (V)
OOuuttPp
OutPower_vs_Supply_4R6R.grf
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. ADVANCE INFORMATION for pre-production products; subject to
change without notice.