Texas Instruments TAS5508-5121K8EVM, TAS5121 manual

Short-Circuit Protection and Fault-Reporting Circuitry

3.1 Short-Circuit Protection and Fault-Reporting Circuitry

The TAS5121 is a self-protecting device that provides device fault reporting (including high-temperature protection and short-circuit protection). The TAS5121 is configured in back-end auto-recovery mode and, therefore, resets automatically after all errors (M1, M2, and M3 is set low). This means that the device restarts itself after an error occasion and reports shortly through SD1 and SD2 error signals.

The shutdown report signals are separated into two wires, SD1 and SD2. SD1 covers the primary information channels (front channels and center), where the SD2 covers the secondary information channels (rear channels, surround/line out channels, and subwoofer). Therefore, a microprocessor can react differently on errors depending on primary or secondary channels faults, e.g., lowering the output level or shutting down the secondary channels on continues error reporting from one of those, where the primary channels continue.

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