TPA4861 Datasheet, PDF (12/24 Pages) Texas Instruments – 1-W AUDIO POWER AMPLIFIER

TPA4861
1-W AUDIO POWER AMPLIFIER
SLOS163B – SEPTEMBER 1996 – REVISED MARCH 2000
TYPICAL CHARACTERISTICS
OUTPUT POWER
vs
LOAD RESISTANCE
1.4
AV = –2 V/V
1.2
f = 1 kHz
CB = 0.1 µF
THD+N ≤ 1%
1
0.8
0.6
VDD = 5 V
0.4
0.2
VDD = 3.3 V
0
4 8 12 16 20 24 28 32 36 40 44 48
Load Resistance – Ω
Figure 29
OPEN-LOOP GAIN
vs
FREQUENCY
100
45°
VDD = 5 V
RL = 8 Ω
80
CB = 0.1 µF _0°
60
–45°
Phase
40
–90°
20
Gain
–135°
0
–180°
–20
10
–225°
100 1 k 10 k 100 k 1 M 10 M
f – Frequency – Hz
Figure 31
2
1.75
1.5
1.25
1
0.75
OUTPUT POWER
vs
SUPPLY VOLTAGE
AV = –2 V/V
f = 1 kHz
CB = 0.1 µF
THD+N ≤ 1%
RL = 4 Ω
RL = 8 Ω
0.5
RL = 16 Ω
0.25
0
2.5
3
3.5
4
4.5
5
5.5
Supply Voltage – V
Figure 30
SUPPLY RIPPLE REJECTION RATIO
vs
FREQUENCY
0
VDD = 5 V
–10 RL = 8 Ω
Bridge-Tied Load
–20
–30
–40
CB = 0.1 µF
–50
–60
CB = 1 µF
–70
–80
–90
–100
100
1k
f – Frequency – Hz
Figure 32
10 k 20 k
12
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