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TPA2028D1_15 Datasheet, PDF (9/39 Pages) Texas Instruments – 3-W Mono Class-D Audio Amplifier with Fast Gain Ramp SmartGain™ AGC/DRC
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OUTPUT LEVEL
vs
INPUT LEVEL
20
Limiter Level = 9 dBV
10
RL = 8 Ω + 33 µH
VDD = 5 V
Fixed Gain = 0 dB
0 Max Gain = 30 dB
−10
−20
−30
−40
−50
−70
Compression Ratio = 1:1
Compression Ratio = 2:1
Compression Ratio = 4:1
Compression Ratio = 8:1
−50
−30
−10
Input Level − dBV
Figure 9.
10
G007
TOTAL HARMONIC DISTORTION + NOISE
vs
FREQUENCY
10
Gain = 6 dB
RL = 8 Ω + 33 µH
1 VDD = 3.6 V
PO = 0.5 W
PO = 0.25 W
0.1
0.01
PO = 0.05 W
0.001
20
100
1k
f − Frequency − Hz
Figure 11.
10k 20k
G008
TOTAL HARMONIC DISTORTION + NOISE
vs
FREQUENCY
10
Gain = 6 dB
RL = 8 Ω + 33 µH
1 VDD = 5 V
PO = 0.5 W
0.1
PO = 0.1 W
0.01
0.001
20
PO = 1 W
100
1k
f − Frequency − Hz
Figure 13.
10k 20k
G009
TPA2028D1
SLOS660B – JANUARY 2010 – REVISED SEPTEMBER 2012
SUPPLY RIPPLE REJECTION RATIO
vs
FREQUENCY
0
Gain = 6 dB
−10 RL = 8 Ω + 33 µH
−20
−30
−40
VDD = 2.5 V
−50
−60
VDD = 3.6 V
−70
−80
20
100
1k
f − Frequency − Hz
Figure 10.
VDD = 5 V
10k 20k
G014
TOTAL HARMONIC DISTORTION + NOISE
vs
FREQUENCY
10
Gain = 6 dB
RL = 4 Ω + 33 µH
1 VDD = 3.6 V
PO = 1 W
0.1
0.01
0.001
20
PO = 0.1 W
PO = 0.5 W
100
1k
f − Frequency − Hz
Figure 12.
10k 20k
G010
TOTAL HARMONIC DISTORTION + NOISE
vs
FREQUENCY
10
Gain = 6 dB
RL = 4 Ω + 33 µH
1 VDD = 5 V
PO = 2 W
PO = 1 W
0.1
0.01
0.001
20
PO = 0.2 W
100
1k
f − Frequency − Hz
Figure 14.
10k 20k
G011
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9
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