TS4995 Datasheet, PDF (12/26 Pages) STMicroelectronics – 1.2 W fully differential audio power amplifier with selectable standby and 6 dB fixed gain

Electrical characteristics
TS4995
Figure 26. Output power vs. power supply
voltage
Figure 27. Power derating curves
2,0
Cb = 1μF
1,8 _{F = 1kHz}
1,6 ^{BW < 125 kHz}
Tamb = 25°C
1,4
1,2
1,0
0,8
0,6
0,4
0,2
0,0
2,5
3,0
3,5
4Ω
8Ω
16Ω
4,0
4,5
Vcc (V)
32Ω
5,0
5,5
1.2
1.0
Heat sink surface ≈ 100mm²
0.8
0.6
0.4
0.2
No Heat sink
0.0
0
25
50
75
100
125
Ambiant Temperature (°C)
Figure 28. Output power vs. load resistance Figure 29. Power dissipation vs. output power
2000
1800
1600
1400
1200
1000
800
Vcc=5.5V
Vcc=5V
Vcc=4.5V
Vcc=4V
THD+N = 1%
F = 1kHz
Cb = 1μF
BW < 125kHz
Tamb = 25°C
Vcc=3.3V
Vcc=2.6V
600
400
200
0
4 6 8 10 12 14 16 18 20 22 24 26 28 30 32
Load Resistance (Ω)
1.4
Vcc=5V
1.2 ^F=1kHz
THD+N<1%
1.0
RL=4Ω
0.8
0.6
0.4
RL=8Ω
0.2
RL=16Ω
0.0
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
Output Power (W)
Figure 30. Power dissipation vs. output power Figure 31. Power dissipation vs. output power
0.6
Vcc=3.3V
F=1kHz
0.5 _THD+N<1%
0.4
RL=4Ω
0.3
0.2
RL=8Ω
0.1
RL=16Ω
0.0
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
Output Power (W)
0.40
Vcc=2.6V
0.35 F=1kHz
THD+N<1%
0.30
RL=4Ω
0.25
0.20
0.15
RL=8Ω
0.10
0.05
RL=16Ω
0.00
0.0
0.1
0.2
0.3
0.4
Output Power (W)
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