9.3.10.1.3 Overtemperature

The TAS2555 device has an integrated overtemperature protection that is enabled once the Class-D is powered up. If the device internal junction temperature exceeds the safe operating region it will trigger the overtemperature fault. Once the fault is detected the TAS2555 device disables the audio channel and power down the Class-D amplifier. The device waits until the user reads the overtemperature flag in B0_P0_R104[4] to re-enable the Class-D amplifier if the junction temperature returns into a safe operating region. When an over-temperature event occurs, a status flag at B0_P0_R104[4] is set. This register is sticky and the bit will remain high for as long as it is not read, or the device is not reset. The overtemperature event can also be used to generate an interrupt if required. Refer to IRQs and Flags section for more details. The overtemperature automatic re-enable can be disabled by setting B0_P2_R9[2]=1. If the automatic re-enable is disabled, to re-enable the audio channel after the overtemperature fault the Class-D must be re-enabled by setting B0_P0_R5[7]=1. All other configurations are preserved and the audio channel will power up with the last configured settings.