TS4984 Datasheet, PDF (10/29 Pages) STMicroelectronics – 2 x 1W Stereo audio power amplifier with active low standby mode

TS4984
Figure 20: Power supply rejection ratio
(PSRR) vs. DC output voltage
0
Vcc = 2.6V
-10
Vripple = 200mVpp
RL = 8Ω
-20
Cb = 1µF
AV = 2
Tamb = 25°C
-30
-40
-50
-60
-70
-2.5 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5
Differential DC Output Voltage (V)
Figure 21: Power supply rejection ratio
(PSRR) vs. DC output voltage
0
Vcc = 2.6V
-10
Vripple = 200mVpp
RL = 8Ω
Cb = 1µF
-20
AV = 5
Tamb = 25°C
-30
-40
-50
-60
-2.5 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5
Differential DC Output Voltage (V)
Figure 22: Power supply rejection ratio
(PSRR) vs. DC output voltage
0
Vcc = 2.6V
Vripple = 200mVpp
-10
RL = 8Ω
Cb = 1µF
AV = 10
-20
Tamb = 25°C
-30
-40
-50
-2.5 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5
Differential DC Output Voltage (V)
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Electrical characteristics
Figure 23: Power supply rejection ratio
(PSRR) at f=217Hz vs. bypass
capacitor
-30
-40
-50
Av=2
-60 ^Vcc:
2.6V
3.3V
-70 5V
-80
0.1
Av=10
Vcc:
2.6V
3.3V
5V
Av=5
Vcc:
2.6V
3.3V
5V
Tamb=25°C
1
Bypass Capacitor Cb ( F)
Figure 24: Output power vs. power supply
voltage
2.00
1.75
1.50
RL = 4Ω
F = 1kHz
BW < 125kHz
Tamb = 25°C
1.25
1.00
0.75
0.50
0.25
0.00
2.5 3.0
THD+N=10%
THD+N=1%
3.5 4.0 4.5 5.0 5.5
Vcc (V)
Figure 25: Output power vs. power supply
voltage
1.75
1.50
1.25
RL = 8Ω
F = 1kHz
BW < 125kHz
Tamb = 25°C
1.00
0.75
0.50
0.25
0.00
2.5 3.0
THD+N=10%
THD+N=1%
3.5 4.0 4.5 5.0 5.5
Vcc (V)