TS4972 データシートの表示（PDF） - STMicroelectronics
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TS4972 Datasheet PDF : 30 Pages
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TS4972
Figure 13: Power Supply Rejection Ratio
(PSRR) vs Feedback Capacitor
-10
Vcc = 5, 3.3 & 2.6V
-20 Cb = 1µF & 0.1µF
Rfeed = 22kΩ
-30 Vripple = 200mVrms
Input = floating
-40 RL = 8Ω
Tamb = 25°C
-50
Cfeed=0
Cfeed=150pF
Cfeed=330pF
-60
-70
Cfeed=680pF
-80
10
100
1000
10000
Frequency (Hz)
100000
Figure 14: Power Supply Rejection Ratio
(PSRR) vs Input Capacitor
-10
Cin=1µF
Vcc = 5, 3.3 & 2.6V
-20
Cin=330nF
Cin=220nF
Rfeed = 22kΩ, Rin = 22k
Cb = 1µF
Rg = 100Ω, RL = 8Ω
-30
Tamb = 25°C
-40
Cin=100nF
-50
Cin=22nF
-60
10
100
1000
10000
Frequency (Hz)
100000
Figure 15: Pout @ THD + N = 1% vs Supply
Voltage vs RL
1.6
Gv = 2 & 10
1.4 Cb = 1µF
F = 1kHz
1.2 BW < 125kHz
Tamb = 25°C
1.0
8Ω
6Ω
4Ω
0.8
16 Ω
0.6
0.4
0.2
0.0
2.5
32 Ω
3.0
3.5
4.0
4.5
5.0
Power Supply (V)
Electrical Characteristics
Figure 16: Power Dissipation vs Pout
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 17: Power Dissipation vs Pout
0.40
Vcc=2.6V
0.35 F=1kHz
THD+N<1%
0.30
RL=4Ω
0.25
0.20
0.15
0.10
RL=8Ω
0.05
RL=16Ω
0.00
0.0
0.1
0.2
0.3
0.4
Output Power (W)
Figure 18: Pout @ THD + N = 10% vs Supply
Voltage vs RL
2.0
Gv = 2 & 10
1.8 Cb = 1µF
1.6 F = 1kHz
BW < 125kHz
1.4 Tamb = 25°C
1.2
1.0
0.8
0.6
0.4
0.2
0.0
2.5
3.0
8Ω
6Ω
4Ω
16 Ω
3.5
4.0
Power Supply (V)
32 Ω
4.5
5.0
8/30
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