TDA7476 datasheet(3/15 Pages) STMICROELECTRONICS

3 / 15 page

ELECTRICAL CHARACTERISTICS (continued)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

AUDIO INPUTS CH1, CH2, CH3, CH4, CH5 - TURN ON DIAGNOSTIC

Pgnd

Short to GND det. (below this

limit, the Audio Output is

considerd in Short Circuit to

GND)

Power amplifier in st-by

condition

0.8

Pvs

Short to Vs det. (above this

limit, the Audio Output is

considered in Short Circuit to Vs)

Vs-0.7

Pnop

Normal operation thresholds.

(Within these limits, the Audio

Output is considered without

faults)

1.2

Vs-1.3

Lsc

Shorted Load det. (voltage

across the Audio Outputs).

Below this limit the load is

considered shorted.

5mV

Lop

Open Load det. (voltage across

the Audio Outputs). Above this

limit the load is considered open.

550

Lnop

Normal load det. (Voltage

across the Audio Output).

Within these limits the load

resistance is considered normal.

220

AUX INPUTS AUX1, AUX2 - TURN ON DIAGNOSTIC

Agnd

Short to GND det. (voltage

across the sensing resistor).

Above this limit the AUX pin is

considered in Short Circuit to

GND.

High side driver ON

0.75

Aol

Open load det. (voltage across

the sensing resistor). Below this

limit the Aux pin is considered in

Open Load condition.

0.085

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

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

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-0.7

Pnop

Normal operation thresholds.

(Within these limits, the Audio

Output is considered without

faults)

1.2

Vs-1.3

TDA7476

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