TDA7491MV Datasheet, PDF (14/28 Pages) STMicroelectronics – 25 W mono BTL class-D audio amplifier

Characterization curves
Figure 11. Power dissipation and efficiency vs output power
Test Condition :
Vcc = 18V,
RL = 8 ohm,
Rosc =39kO, Cosc =100nF,
f =1kHz,
Gv =30dB,
Tamb =25℃
90
80
70
60
50
40
30
20
10
0
0
Power dissipation & Efficiency vs Output power
Vcc=18V
Rload=8ohm
Gain=30dB
f=1kHz
5
10
15
Output power per channel (W)
TDA7491MV
4
3.5
3
2.5
2
1.5
1
0.5
0
20
Figure 12. Attenuation vs mute voltage
Test Condition :
Attenuation vs Mute voltage
Vcc = 18V,
10
RL = 8 ohm,
0
Rosc =39kO, Cosc =100nF,
-10
0dB@f =1kHz, Po=1w
-20
Gv =30dB,
-30
Tamb =25℃
-40
-50
Vcc=18V
Rload=8ohm
-60
Gain=30dB
-70
0dB@f=1kHz,Po=1w
-80
-90
0
0.5
1
1.5
2
2.5
3
3.5
Mute voltage (V)
Figure 13. Current consumption vs voltage on pin STBY
Test Condition :
Vcc = 18V,
RL = 8 ohm,
30
Rosc =39kO, Cosc =100nF,
25
Vin=0,
Gv =30dB,
20
Tamb =25℃
15
Iquiescent vs Standby voltage
Vcc=18V
Rload=8ohm
Gain=30dB
Vin=0
10
5
0
0
0.5
1
1.5
2
2.5
3
3.5
Standby voltage (V)
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Doc ID 14576 Rev 2