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Short Circuit Protection and Fault Reporting Circuitry
3-2
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 TAS5066−5111D6EVM 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.