Does the TPA6017A2 have thermal and short-circuit protection?

Although it's not listed on the data sheet, the TPA6017A2 does indeed have both these protection circuitries built-in.

Both are unlatched faults - which means once the condition causing the fault is removed, the device will resume normal operation.

The thermal protection compares the junction temperature to a reference. If the junction temperature exceeds about 150C (this threshold is not tightly controlled as this is meant to be a fail-safe protection, NOT something you should depend on for normal circuit operation), the output stage turns off until the die cools down 15-30C, at which point it resumes normal operation. During the time that the die temperature exceeds 150C, the outputs will stay at VDD/2.

The short-circuit protection protects each of the four output pins from shorts to VDD, GND, as well as shorted load. The output current is compared to a reference, and if the current exceeds that threshold level (about 2.8A for this device), the outputs are disabled. Once the current decays, the amplifier re-tries the outputs to check if the short has been removed. Again, this protection is meant as a fail-safe mode, and should not be depended upon in your design.

See the attached .pdf for plots of these two protection circuits in action.

This information also applies to TPA0112, TPA0122, TPA0132, TPA0142, TPA0152, TPA0162, TPA0212, TPA0222, TPA0232, TPA0242, TPA0252, TPA0312, and TPA6017A2.

-d2