General structure

STA540SA

22/30

Doc ID 16066 Rev 2

8.8

Handling of the diagnostic information

As different diagnostic information is available at the same pin (clipping detection, output

fault, thermal proximity), the signal must be handled correctly in order to discriminate the

event. This could be done by taking into account the different timing of the diagnostic output

during each case.

Normally, clip-detector signalling under faulty conditions produces a low level at pin 12.

Based on this assumption, an interface circuitry to differentiate the information is shown in

Figure 34.

Figure 33.

Waveforms

Figure 34.

Interface circuit diagram

t

t

t

ST-BY PIN

VOLTAGE

Vs

OUTPUT

WAVEFORM

Vpin 12

WAVEFORM

SHORT TO GND

OR TO Vs

D05AU1604_bc

CLIPPING

THERMAL

PROXIMITY

Obsolete

Product(s)

- Obsolete

Product(s)