TDA7377 Datasheet, PDF (7/10 Pages) STMicroelectronics – 2 x 30WDUAL/QUAD POWER AMPLIFIER FOR CAR RADIO

Figure 24: Fault Waveforms
TDA7377
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 various kinds of information is available at the
same pin (clipping detection, output fault, thermal
proximity), this signal must be handled properly in
Figure 25: Waveforms
order to discriminate each event.
This could be done by taking into account the dif-
ferent timing of the diagnostic output during each
case.
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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