TS4998 Datasheet, PDF (18/33 Pages) STMicroelectronics – 2 x 1W differential input stereo audio amplifier

Electrical characteristics
TS4998
Figure 56. Frequency response
Figure 57. Output power vs. load resistance
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
20
Cin=4.7μF, Rin=12kΩ
Cin=680nF, Rin=12kΩ
Cin=4.7μF, Rin=24kΩ
Cin=330nF, Rin=24kΩ
100
1000
Frequency (Hz)
Vcc = 2.7V
Po = 200mW
ZL = 8Ω + 500pF
Tamb = 25°C
10000 20k
1800
1600
1400
1200
1000
800
600
Vcc=5.5V
Vcc=5V
Vcc=4.5V
THD+N = 1%
F = 1kHz
Cb = 1μF
BW < 125kHz
Tamb = 25°C
Vcc=4V
Vcc=3.3V
Vcc=3V
400
200
Vcc=2.7V
0
4
8
12
16
20
24
28
32
Load Resistance (Ω)
Figure 58. Output power vs. power supply
voltage
Figure 59. Output power vs. power supply
voltage
1800
1600
1400
1200
F = 1kHz
Cb = 1μF
BW < 125 kHz
Tamb = 25°C
1000
800
600
400
200
0
2.5
3.0
3.5
RL=4Ω
4.0
Vcc (V)
RL=8Ω
RL=16Ω
RL=32Ω
4.5
5.0
5.5
2200
2000
1800
1600
F = 1kHz
Cb = 1μF
BW < 125 kHz
Tamb = 25°C
1400
1200
1000
800
600
400
200
0
2.5
3.0
3.5
RL=4Ω
4.0
Vcc (V)
RL=8Ω
RL=16Ω
RL=32Ω
4.5
5.0
5.5
Figure 60. Power dissipation vs. output power Figure 61. Power dissipation vs. output power
1500
1400
1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
0
RL=4Ω
RL=8Ω
RL=16Ω
Vcc = 5V
F = 1kHz
THD+N < 1%
200 400 600 800 1000 1200 1400 1600
Output Power (mW)
600
550
500
450
400
350
300
250
200
150
100
50
0
0
RL=4Ω
RL=8Ω
RL=16Ω
Vcc = 3.3V
F = 1kHz
THD+N < 1%
100 200 300 400 500 600 700
Output Power (mW)
18/33