TDA7476 datasheet(4/19 Pages) STMICROELECTRONICS

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TDA7476

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Lsc

Shorted Load det. (voltage across

the Audio Outputs). Below this

limit the load is considered

shorted.

Power amplifier in st-by condition

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

0.85

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-0.6

Pnop

Normal operation thresholds.

(Within these limits, the Audio

Output is considered without

faults)

1.2

Vs-1.2

AUX INPUTS - PERMANENT DIAGNOSTIC

Agnd

Short to GND 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

High side driver ON

0.85

ELECTRICAL CHARACTERISTICS (continued)

(Vs = 14.4V; Tamb = 25°, unless otherwise specified.)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

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