TDA7377
Figure 24:
FaultWaveforms
ST-BY PIN
VOLTAGE
2V
t
t
t
OUT TO Vs SHORT
SOFT SHORT
OUTPUT
WAVEFORM
OUT TO GND SHORT
Vpin 10
CORRECT TURN-ON
FAULT DETECTION
CHECK AT TURN-ON
(TEST PHASE)
SHORT TO GND
OR TO Vs
D94AU149A
TION
order to discriminate each event.
This could be done by taking into account the dif-
ferent timing of the diagnostic output during each
case.
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
ST-BY PIN
VOLTAGE
t
Vs
OUTPUT
WAVEFORM
t
Vpin 10
WAVEFORM
t
CLIPPING
SHORT TO GND THERMAL
D94AU150
OR TO Vs
PROXIMITY
7/10
STMICROELECTRONICS [ ST ]
