Texas Instruments TAS5121, TAS5508-5121K8EVM Device Fault Reporting, 1. Channel Allocation, Otw

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Device Fault Reporting

3.2 Device Fault Reporting

The OTW and SD outputs from the TAS5121 indicate fault conditions. See the TAS5121 data sheet (SLES086) for a description of these pins.

The temperature warning signals at the TAS5508−5121K8EVM board are wired-OR to one temperature warning signal [OTW – pin 22 in control interface connector (J30)].

Shutdown signals are wired-OR into two shutdown signals [SD1 and SD2 – pin 20 and pin 21 in control interface connector (J30)]. See Table 3−1 for channel allocation.

Table 3−1. Channel Allocation

Description

Terminal

Shutdown Signal

 

 

 

 

 

Front left

J100

 

 

 

 

SD1

Front right

J200

 

 

 

 

SD1

Rear left

J300

 

 

 

 

SD2

Rear right

J400

 

 

 

 

SD2

Surround left (or line out left)

J500

 

 

 

 

SD2

Surround right (or line out right)

J600

 

 

 

 

SD2

Center

J700

 

 

 

 

SD1

Subwoofer

J800

 

 

 

 

SD2

The shutdown signals, together with the temperature warning signal, give chip state information as described in Table 3−2. Device fault reporting outputs are open-drain outputs.

Table 3−2. TAS5121 Warning/Error Signal Decoding

 

 

 

 

Device Condition

 

OTW

SDx

 

0

0

High-temperature error and/or high-current error

01 High-temperature warning

10 Undervoltage lockout or high-current error

1

1

Normal operation, no errors/warnings

 

 

 

Protection 3-3

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Contents User’s Guide Products Applications Important NoticeFCC Warning Evaluation BOARD/KIT Important NoticeEVM Warnings and Restrictions About This Manual Read This FirstPart Number Literature Number Related Documentation From Texas InstrumentsContents Tables FiguresOverview TAS5508−5121K8EVM Features PCB Key Map−1. Integrated PurePath Digital EAmplifier System TAS5508−5121K8EVM Features−2. Physical Structure for TAS5508−5121K8EVM Rough Outline PCB Key MapPage System Interfaces Recommendations Power Supply PSU Interface J70, J71, and J73−1. Recommended Supply Voltages Voltage Limitations Current Description−4. J73 Pin Description Pin No Net-Name at Schematics Description−2. J71 Pin Description −3. J70 Pin Description−6. J100 . . . J800 Pin Description Loudspeaker Connectors J100 . . . J800Line Out Connectors J950 and J951 −5. J72 Pin Description−8. J900 Pin Description Headphone Connector J900Line Output Select J50 Headphone Select J32−11. J30 Pin Description Pin Net-Name at Schematics DescriptionControl Interface J30 −12.J40 Pin Description Digital Audio Interface J40Page Protection Short-Circuit Protection and Fault-Reporting Circuitry OTW Device Fault Reporting−2. TAS5121 Warning/Error Signal Decoding −1. Channel Allocation

TAS5121, TAS5508-5121K8EVM specifications

The Texas Instruments TAS5508-5121K8EVM is an advanced evaluation module that features the TAS5121 audio amplifier, designed to demonstrate the capabilities of TI’s innovative audio processing technology. This module is a key resource for engineers looking to explore high-performance audio systems and seamless integration into their product designs.

One of the main features of the TAS5508-5121K8EVM is its ability to deliver high-quality digital audio amplification. The TAS5121 DAC (digital-to-analog converter) is featured prominently, supporting various digital audio interfaces such as I2S and PCM. This flexibility allows designers to interface the device with a wide range of digital signal processors and microcontrollers.

The TAS5121 incorporates a Class-D amplification architecture that significantly enhances audio performance while maintaining energy efficiency. Class-D amplifiers are known for their high efficiency, which translates to less heat generation and reduced power consumption compared to traditional linear amplifiers. This is particularly important in portable or battery-operated applications, where power management is crucial.

The evaluation module supports up to 128 watts of output power per channel, making it suitable for demanding audio applications such as home theater systems, professional audio equipment, and automotive sound systems. The TAS5121 is designed to operate at various load impedances, thus ensuring optimal sound quality across different speaker types.

The TAS5508-5121K8EVM also features integrated diagnostic capabilities that allow users to monitor the system's performance in real time. Built-in protections against over-temperature and over-current conditions contribute to the device’s robustness, making it suitable for long-term applications in diverse environments.

Moreover, the evaluation module supports seamless integration with TI’s PurePath™ platform, which enhances digital audio processing through advanced algorithms. These technologies promote superior sound reproduction, allowing users to take advantage of dynamic range control and equalization features.

In summary, the Texas Instruments TAS5508-5121K8EVM with the TAS5121 audio amplifier is an essential tool for audio engineers and designers. Its combination of digital audio processing, Class-D amplification, robust diagnostic features, and support for high output power make it a versatile solution for a range of high-performance audio applications. As technology continues to evolve, this evaluation module serves as a reliable foundation for developing next-generation audio products.
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