Texas Instruments | TAS5805M Transition – from TAS5707, TAS5733L, TAS5751M | Application notes | Texas Instruments TAS5805M Transition – from TAS5707, TAS5733L, TAS5751M Application notes

Texas Instruments TAS5805M Transition – from TAS5707, TAS5733L, TAS5751M Application notes
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TAS5805M Transition Guide – from TAS5707, TAS5733L,
TAS5751M
Victor Ceron, Audio Amplifier Products
Summary
Are you considering using TAS5707, TAS5733L or
TAS5751M? Are you interested in improving
performance for your, up to 23W, digital audio system?
If you answered YES to any of these questions, this
technical note will help you design a better, more costeffective system. The purpose of this technical note is
to help transition customers from TAS5707,
TAS5733L, or TAS5751M to TI’s next-generation
inductor-less TAS5805M.
What is TAS5805M?
TAS5805M is TI’s new closed-loop, Inductorless, 23-W
stereo digital-input Class-D Amplifier with 96-kHz
Enhanced Processing and SDOUT. Below a few of the
features’ benefits will be explained:
Closed Loop. TAS5805M closed-loop topology
reduces component count and solution size; typical
open loop solutions need 31 passive components
(resistors, capacitors) while TAS5805M needs only 8
passives. TAS5805M closed-loop topology provides
better THD+N for better sound quality.
Inductor-less (at ≤ 10W/Ch). TAS5805M can use lowcost ferrite beads, instead of bulky and expensive
inductors, while still passing EMC standards.
96-kHz Enhanced Processing. TAS5805M leverages
96-kHz sampling rate for better sound quality. Its
integrated processing capabilities allow system
designers to leverage up to 35 Biquads for superior
sound enhancement.
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SDOUT. Serial Data Out allows TAS5805M to output a
stereo digital data stream pre- or post-DSP. SDOUT
can be leveraged to add a subwoofer channel or to
enhance external echo cancellation algorithms.
Hybrid Modulation. Hybrid Modulation is designed for
minimized power loss without compromising the
THD+N performance, and is optimized for batterypowered applications with Hybrid modulation.
3-band Dynamic Range Compression (DRC). TI’s
advanced DRC allows for complete control over the
sound pressure level (SPL) spectrum. It significantly
reduces noise while making low signals louder and
high signals softer for a more enjoyable experience.
How can I transition to TAS5805M?
Systems currently using any of the aforementioned
legacy devices can transition to TAS5805M as long as
the power needs are met per the tables above with
minimum design changes. Systems with output power
requirements ≤10W/ch will particularly benefit from
transitioning to TAS5805M as they can fully leverage
its inductor-less capabilities to accommodate smaller
ferrite beads. As detailed above, systems that
transition to TAS5805M will leverage a smaller solution
size (fewer passives and smaller ferrite beads) and
better sound quality/enhancements (higher sampling
rate, up to 96kHz, and better processing capabilities,
up to 35 biquads).
How does TAS5805M compare to TI’s legacy
digital-input open-loop Class-D amplifiers?
Table 1 summarized how TAS5805M compares to
TAS5751M, TAS5733L and TAS5707.
TAS5805M Transition Guide – from TAS5707, TAS5733L, TAS5751M Victor
Copyright © 2018, Texas Instruments Incorporated
Ceron, Audio Amplifier Products
1
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Table 1. Comparison Table for TAS5805M vs. TAS5707, TAS5733L, TAS5751M
TAS5733L
TAS5751M
TAS5707
TAS5805M
Voltage range
8V – 16V
8V – 26V
8V – 26V
4.5V – 26V
Current
4A
4A
4.5A
5A
180mΩ
180mΩ
Rdson
120mΩ
80mΩ
Power 2.0: 12V, 4Ω,
10% THD+N
2x15W
2x17W
Power 2.0: 12V, 8Ω,
10% THD+N
2x9W
2x10W
Power 2.0: 18V, 8Ω,
10% THD+N
2x16W
2x9W
2x20W
2x10W
2x21W
Architecture
Open Loop
Open Loop
Open Loop
SNR
104dB
106dB
106dB
Closed Loop
107dB
Input Data Format
I2S
I2S
I2S
I2S, TDM
Biquads
20BQs
20BQs
14BQs
35BQs
SDOUT
No
No
No
Yes
Maximum Sampling Rate
48kHz
48kHz
48kHz
96kHz
Inductorless
No
No
No
Yes (up to 10W)
Crosstalk
69dB
62dB
62dB
110dB
Additional Resources
• Download the TAS5805M datasheet. (SLASEH5B).
• Get started quickly with the TAS5805M evaluation module (SLOU510).
• LC Filter Design application note (SLAA701)
• Visit TI’s Smart Speaker portal to learn how TAS5805M fits in this application.
• App note: Minimize Idle Current in Portable Audio with TAS5805M Hybrid Mode (SLAA836)
• Simplify evaluation, configuration and debug process with PurePath™ Console, highly integrated and easy-touse audio development suite.
2
TAS5805M Transition Guide – from TAS5707, TAS5733L, TAS5751M Victor
Ceron, Audio Amplifier Products
Copyright © 2018, Texas Instruments Incorporated
SLLA437 – November 2018
Submit Documentation Feedback
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