The TAS2764 monitors the temperature of the internal power FETs. If the maximum continue power is high and power FETs temperature goes above a threshold, an in-built protection circuit will trigger a thermal foldback and, if temperature still increases, shutdown the device.

The protection mechanism is based on two thresholds TH1 and TH2. The TH1 threshold is set at a temperature 116⁰C higher than the temperature measured by the internal bandgap but not less than 250⁰C. The TH1 threshold triggers a thermal foldback.

The TH2 threshold is 40⁰ C above TH1 and triggers thermal shutdown.

The two detection mechanisms can be disabled by setting bits TH_DET_TH2_EN and TH_DET_TH1_EN of register 0x47, page 0x01 to low.