TDA7245 データシートの表示（PDF） - STMicroelectronics

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TDA7245

5W AUDIO AMPLIFIER WITH MUTING AND STAND-BY

STMicroelectronics 

TDA7245

Figure 16: Ipin4 (muting) vs. Supply Voltage

Figure 17: Ipin5 (St-By) vs. Supply Voltage

Figure 18: Quiescent Current (St-By) vs. Supply

Voltage

Figure 19: Output Attenuation vs. Vpin5

Figure 20: Quiescent Current vs. Vpin5

8/11

MUTING / STAND- BY

The muting function allows to inhibit the output

signal through an external control signal.

It can be used in many cases, when a temporary

inhibition of the output signal is requested, for ex-

ample:

– in switch-on condition, to avoid preamplifier

power-on transients

– during switching at the input stages

– during the receiver tuning.

The stand-by function is very useful and permits a

complete turn ON/OFF of the device through a

low power signal, which can be provided by a µP.

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