Datasheet

STA540 Practical information
Doc ID 13907 Rev 6 21/25
6.8 Handling the diagnostic information
As different diagnostic information (clipping detection, output fault, approaching thermal
shutdown) becomes available at pin 10 so the behavior of the signal at this pin changes.
In order to discriminate the event, signal DIAGNOSTICD, pin 10, must be interpreted
correctly. Figure 27 shows a combination of events on the output waveform and the
corresponding output on pin 10.
This events could be diagnosed based on the timing of the output signal on pin 10. For
example, the clip-detector signalling under fault conditions could produce a low level for a
short time. On the other hand, an output short circuit would probably produce a low level for
a much longer time. With these assumptions, an interface circuit based on the one shown in
Figure 28 could differentiate the information and flag the appropriate circuits.
Figure 27. Waveforms
Figure 28. Interface circuit diagram
t
t
t
ST-BY PIN
VOLTAGE
Vs
OUTPUT
WAVEFORM
Vpin 10
WAVEFORM
SHORT TO GND
OR TO Vs
D05AU1604mod
CLIPPING
THERMAL
PROXIMITY