TDA7375A_05 Datasheet, PDF (10/15 Pages) STMicroelectronics – 2 X 37W DUAL/QUAD POWER AMPLIFIER FOR CAR RADIO

TDA7375A
Figure 24.
5.6.1 Diagnostics Facility
The TDA7375A is equipped with a diagnostic circuitry able to detect the following events:
■ Clipping in the output signal
■ Thermal shutdown
■ Output fault:
– short to GND
– short to V_S
– soft short at turn on
The information is available across an open collector output (pin 10) through a current sinking when the
event is detected A current sinking at pin 10 is triggered when a certain distortion level is reached at any
of the outputs. This function allows gain compression possibility whenever the amplifier is overdriven.
5.6.2 Thermal Shutdown
In this case the output 10 will signal the proximity of the junction temperature to the shutdown threshold.
Typically current sinking at pin 10 will start ~10°C before the shutdown threshold is reached.
Figure 25. Clipping Detection Waveforms
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