TDA7375A Datasheet, PDF (11/14 Pages) STMicroelectronics – 2 x 37W DUAL/QUAD POWER AMPLIFIER FOR CAR RADIO

Figure 24: Fault Waveforms
TDA7375A
ST-BY PIN
VOLTAGE
2V
t
OUT TO Vs SHORT
OUTPUT
WAVEFORM
SOFT SHORT
t
OUT TO GND SHORT
Vpin 10
CORRECT TURN-ON
FAULT DETECTION
CHECK AT TURN-ON
(TEST PHASE)
D94AU149A
t
SHORT TO GND
OR TO Vs
TION
As different kinds of information is available at the
same pin (clipping detection, output fault, thermal
proximity), this signal must be handled properly in
order to discriminate the event.
Figure 25: Waveforms
This could be done taking into account the differ-
ent timing of the diagnostic output against differ-
ent events.
Normally the clip detector signalling produces a
low level at out 10 that is shorter referred to every
ST-BY PIN
VOLTAGE
Vs
OUTPUT
WAVEFORM
Vpin 10
WAVEFORM
t
t
D94AU150
t
CLIPPING
SHORT TO GND THERMAL
OR TO Vs
PROXIMITY
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