Texas Instruments TAS5518 - Manual (Page 18)

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3.1 Short-Circuit Protection and Fault-Reporting Circuitry
3.2 Fault Reporting
Short-Circuit Protection and Fault-Reporting Circuitry
The TAS5152 is a self-protecting device that provides fault reporting (including high-temperature
protection and short-circuit protection). The TAS5152 is configured in back-end auto-recovery mode and,
therefore, resets automatically after all errors (M1, M2, and M3 are set low). This means that the device
restarts itself after an error and reports shortly through the SD error signal.
The OTW and SD outputs from the TAS5152 indicate fault conditions. Please refer to the TAS5152 Data
Manual for a description of these pins.
Table 3-1. TAS5152 Warning/Error Signal Decoding
OTW SD DEVICE CONDITION
0 0 High-temperature error and/or high-current error
0 1 High-temperature warning
1 0 Undervoltage lockout or high-current error
1 1 Normal operation, no errors/warnings
The temperature warning signals at the TAS5518-5152K8EVM board are wired-OR to one temperature
warning signal (OTW– pin 22 in the control interface connector). Shutdown signals are wired-OR into one
shutdown signal (SD– pin 20 in the control interface connector).
The shutdown signals will activate with the temperature warning signal to give chip-state information as
described in
Table 3-1 . Device fault-reporting outputs are open-drain outputs.
°
18 Protection SLEU074 – June 2006
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