Stereo Evaluation Module Reference Design of the Digital Input, Class-D, IV Sense Audio Amplifier
TIDA-01572
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Key Document
Description
This reference design provides a high-performance stereo audio subsystem for use in PC applications. It operates off a single supply, ranging from 4.5 V to 16 V, and features the TAS2770, a digital-input Class-D audio amplifier that provides excellent noise and distortion performance and is available in both WCSP and QFN packages. The design also includes two low-dropout fixed voltage regulators, the TL760M33 and TPS73618, which generate the necessary 3.3 V and 1.8 V system rails, respectively. The reference design’s versatile digital-input interface allows for a wide variety of input formats, while providing output data for voltage and current sense, supply voltage (VBAT) and temperature. The reference design also includes multiplexing to allow multiple input sources to the digital inputs. Additionally, the TAS2770 incorporates an automatic gain controller that can track VBAT to limit the output voltage, as desired. This function can help extend the battery life of battery-powered applications, such as laptops and tablets, and prevent system-level brownout. Inter-chip limiter alignment can be configured on multiple TAS2770 devices to coordinate limiter activity using a shared digital output. This will ensure that the entire system maintains comparable gain levels at all times to provide the best listening experience.
Features
- Stereo or Mono evaluation mode
- USB input
- IV sense evaluation mode
- Interface to TAS2559YZEVM for speaker protection evaluation
- Access to TAS2770 add-in PurePath Console 3
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What's Included
NOT INCLUDED: PurePath Console 3 add-in: download separately
Schematic/Block Diagram
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Test Data
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TI Devices (14)
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| Sample & Buy |
Design Kits & Evaluation Modules |
| CDCE913 |
Programmable 1-PLL VCXO clock synthesizer with 2.5-V or 3.3-V LVCMOS outputs |
Clocks & timing |
Sample & Buy |
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| SN74AVC2T244 |
Dual-Bit Dual-Supply Bus Transceiver |
Voltage level translators |
Sample & Buy |
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| SN74AVC4T774 |
4-bit dual-supply bus transceiver with configurable voltage-level shifting and 3-state outputs |
Voltage level translators |
Sample & Buy |
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| SN74CB3Q3257 |
3.3-V, 2:1 (SPDT), 4-channel general-purpose FET bus switch |
Switches & multiplexers |
Sample & Buy |
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| SN74LV1T126 |
Single Power Supply, Single BUFFER GATE w/ 3-State Output (active high enable) |
Voltage level translators |
Sample & Buy |
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| SN74LVC2G07 |
2-ch, 1.65-V to 5.5-V buffers with open-drain outputs |
Buffer/driver |
Sample & Buy |
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| SN74LVC2G66 |
5-V, 1:1 (SPST), 2-channel general-purpose analog switch with low on-state resistance |
Switches & multiplexers |
Sample & Buy |
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| TAS2770 |
20-W, digital input, 4.5- to 18-V smart amp with I/V sense for speaker protection |
Audio amplifiers |
Sample & Buy |
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| TCA9406 |
2-bit bidirectional 1MHz I2C/SMBus voltage level translator with internal pull-up resistor |
I2C ICs |
Sample & Buy |
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| TL760M33-Q1 |
Automotive 500-mA, 26-V, high-accuracy, low-dropout voltage regulator |
Power management |
Sample & Buy |
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| TMUX1574 |
5-V, 2:1 (SPDT), 4-channel analog switch with powered-off protection & 1.8-V input logic |
Switches & multiplexers |
Sample & Buy |
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| TPS3897 |
Single-channel, ultra-small, adjustable supervisor with active-high, open-drain output |
Power management |
Sample & Buy |
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| TPS62085 |
3-A Step-Down Converter with DCS-Control and Hiccup Short Circuit Protection in 2x2 HotRod Package |
Step-down (buck) regulators |
Sample & Buy |
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| TPS736 |
400-mA, high-accuracy, ultra-low-dropout voltage regulator with reverse current protection & enable |
Power management |
Sample & Buy |
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CAD/CAE symbols
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Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.
Step 1: Download and install the free download.
Step 2: Download the Symbol and Footprint from the CAD.bxl file table.
Step 3: Open the .bxl file with the Ultra Librarian software.
You can always access the complete CAD/CAE Symbols database at https://webench.ti.com/cad/
Both PCB footprints and schematic symbols are available for download in a vendor neutral format, which can then be exported to the leading EDA CAD/CAE design tools using the Ultra Librarian Reader. The reader is available as a (free download.).
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Technical documentation
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Datasheet (1)
| Title | Type | Size (KB) | Date |
| | PDF | 5162 |
20 Dec 2018
|
User guide (2)
| | PDF | 4039 |
20 Apr 2018
|
| | PDF | 4050 |
15 Sep 2017
|
Design files (6)
| | ZIP | 1650 |
20 Apr 2018
|
| | ZIP | 2934 |
20 Apr 2018
|
| | PDF | 2766 |
20 Apr 2018
|
| | PDF | 469 |
20 Apr 2018
|
| | PDF | 74 |
20 Apr 2018
|
| | PDF | 633 |
20 Apr 2018
|
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