TDA7476_01 Datasheet, PDF (4/19 Pages) STMicroelectronics – CAR RADIO DIAGNOSTIC PROCESSOR

TDA7476
ELECTRICAL CHARACTERISTICS (continued)
(V_s = 14.4V; T_amb = 25°, unless otherwise specified.)
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
Lsc Shorted Load det. (voltage across Power amplifier in st-by condition
the Audio Outputs). Below this
limit the load is considered
shorted.
5
mV
Lop Open Load det. (voltage across
the Audio Outputs). Above this
limit the load is considered open.
550
mV
Lnop
Normal load det. (Voltage across
the Audio Output). Within these
limits the load resistance is
considered normal.
22
220 mV
AUX INPUTS AUX1, AUX2 - TURN ON DIAGNOSTIC
Agnd Short to GND det. (voltage across High side driver ON
0.85
V
the sensing resistor). Above this
limit the AUX pin is considered in
Short Circuit to GND.
Aol Open load det. (voltage across
the sensing resistor). Below this
limit the Aux pin is considered in
Open Load condition.
0.085 V
Anop
Normal Operation det. (Voltage
across the sensing resistor).
Within these limits the load
resistance connected to the Aux
pin is considered correct.
0.125
0.5
V
AUDIO INPUTS - PERMANENT DIAGNOSTIC
Pgnd
Short to GND det. (below this
limit, the Audio Output is
considered in Short Circuit to Vs)
This condition must be true for a
time higher than Tdel
Power amplifier ON
0.8
V
Pvs Short to Vs det. (above this limit
the Audio Output is considered in
Short Circuit to Vs) This condition
must be true for a time higher
than Tdel
Vs-0.6
V
Pnop
Normal operation thresholds.
(Within these limits, the Audio
Output is considered without
faults)
1.2
Vs-1.2 V
AUX INPUTS - PERMANENT DIAGNOSTIC
Agnd Short to GND det. (above this
High side driver ON
0.85
V
limit, the Audio Output is
considered in Short Circuit to Vs)
This condition must be true for a
time higher than Tdel
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