TDA7377
Figure 24:
Fault Waveforms
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
t
CHECK AT TURN-ON
(TEST PHASE)
D94AU149A
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
t
Vs
OUTPUT
WAVEFORM
t
Vpin 10
WAVEFORM
t
CLIPPING
D94AU150
SHORT TO GND
OR TO Vs
THERMAL
PROXIMITY
7/10