Texas Instruments TAS5066PAG manual Short Circuit Protection and Fault Reporting Circuitry, Otw

Short Circuit Protection and Fault Reporting Circuitry

3.1 Short Circuit Protection and Fault Reporting Circuitry

TAS5111 is a self-protecting device that provides device fault reporting (includ- ing high-temperature protection and short circuit protection). TAS5111 is con- figured in back-end auto-recovery mode and therefore resets automatically af- ter all errors (M1, M2 and M3 is set low). This means that the device will re-start itself after a error occasion and report shortly through the SHUTDOWN error signals.

3.2 Device Fault Reporting

The OTW and SD outputs from TAS5111 indicate fault conditions. Please refer to the TAS5111 data manual for a description of these pins.

Table 3−1. TAS5111 Error Signal Decoding

	OTW		SD	Device Condition
0		0		High temperature error and/or high current error
0		1		High temperature warning
1		0		Under voltage lockout or high current error
1		1		Normal operation, no errors/warnings

The temperature warning (OTW) signals at the TAS5066−511 1D6EVM board are wired-OR to one temperature warning signal (TEMP_WARNING – pin 22 in control interface connector). Shutdown signals (SD) are wired-OR to one shutdown signal (SHUTDOWN – pin 20 in control interface connector). The shutdown signals together with the temperature warning signal will give infor- mation on the chip state information as described in the previous table. Device fault reporting outputs are open-drain outputs.

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