TS4974_07 Datasheet, PDF (14/25 Pages) STMicroelectronics – 1W differential audio power amplifier with up/down digital volume control pins

Electrical characteristics
TS4974
Figure 32. Standby voltage vs. supply current Figure 33. Frequency response
4.0
No load
3.5 ^{Tamb = 25°C}
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.0
0.5
Vcc=2.6V
1.0
1.5
Vstby (V)
Vcc=5V
Vcc=3.3V
2.0
2.5
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
-1
-2
-3
-4
20
Cin=4.7μF
Cin=330nF
Cin=4.7μF
G=+12dB
Vcc = 5V, 3.3V, 2.6V
ZL = 8Ω + 500pF
Tamb = 25°C
Cin=330nF
Cin=4.7μF
G=+6dB
Cin=330nF
100
1000
Frequency (Hz)
G=0dB
10000 20k
Figure 34. Frequency response
Figure 35. Power dissipation vs. output power
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
-1
-2
-3
-4
20
Cin=4.7μF
Cin=330nF
Cin=4.7μF
G=+12dB
Vcc = 5V, 3.3V, 2.6V
ZL = 16Ω + 500pF
Tamb = 25°C
Cin=330nF
Cin=4.7μF
G=+6dB
Cin=330nF
100
1000
Frequency (Hz)
G=0dB
10000 20k
0.8
Vcc = 5V
0.7 ^{F = 1kHz}
THD+N < 1%
0.6
0.5
RL=8Ω
0.4
RL=16Ω
0.3
0.2
RL=32Ω
0.1
0.0
0.0
0.2
0.4
0.6
0.8
1.0
Output Power (W)
Figure 36. Power dissipation vs. output power Figure 37. Power dissipation vs. output power
Vcc = 3.3V
F = 1kHz
0.3 _{THD+N < 1%}
RL=8Ω
0.2
RL=16Ω
0.1
RL=32Ω
0.0
0.0
0.1
0.2
0.3
0.4
Output Power (W)
0.20
0.18
0.16
Vcc = 2.6V
F = 1kHz
THD+N < 1%
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
0.00
0.05
RL=8Ω
RL=16Ω
RL=32Ω
0.10
0.15
0.20
Output Power (W)
0.25
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