TPA3122D2_15 Datasheet, PDF (9/21 Pages) Texas Instruments – 15-W STEREO CLASS-D AUDIO POWER AMPLIFIER

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TPA3122D2
SLOS527A – DECEMBER 2007 – REVISED DECEMBER 2007
TYPICAL CHARACTERISTICS (continued)
TOTAL HARMONIC DISTORTION + NOISE
vs
OUTPUT POWER (BTL)
10
Gain = 20 dB
R_L = 8 Ω (BTL)
1
V_CC = 12 V
0.1
0.01
V_CC = 18 V
V_CC = 24 V
0.001
0.01
0.1
1
10
P_O − Output Power − W
Figure 19.
50
G019
OUTPUT POWER
vs
SUPPLY VOLTAGE (BTL)
70
Gain = 20 dB
60 R_L = 8 Ω (BTL)
50
40
THD+N = 10%
30
THD+N = 1%
20
10
0
10 12 14 16 18 20 22 24 26 28 30
PV_CC − Supply Voltage − V
G021
Figure 21.
SUPPLY CURRENT
vs
TOTAL OUTPUT POWER (BTL)
2.0
1.8 ^{Gain = 20 dB}
R_L = 8 Ω (BTL)
1.6
V_CC = 18 V
1.4
1.2
V_CC = 12 V
1.0
0.8
0.6
V_CC = 24 V
0.4
0.2
0.0
0
4
8
12
16
20
24
P_O − Total Output Power − W
Figure 23.
28
G023
GAIN/PHASE
vs
FREQUENCY (BTL)
30
Phase
20
Gain
10
0
−10
Gain = 20 dB L _filt = 33 mH
−20 ^{PO = 0.125 W Cfilt = 1 mF}
R_L = 8 Ω (BTL)
V_CC = 24 V
−30
20
100
1k
10k
f − Frequency − Hz
Figure 20.
EFFICIENCY
vs
OUTPUT POWER (BTL)
100
−200
−300
−400
−500
−600
−700
200k
G020
80
60
V_CC = 12 V
V_CC = 24 V
40
V_CC = 18 V
20
Gain = 20 dB
R_L = 8 Ω (BTL)
0
0
4
8
12
16
20
24
28
P_O − Output Power − W
G022
Figure 22.
POWER SUPPLY REJECTION RATIO
vs
FREQUENCY (BTL)
0
Gain = 20 dB
−20 ^RL ^{= 8 Ω (BTL)}
V_CC = 24 V
−40
V_ripple = 200 mV_p-p
−60
−80
−100
−120
20
100
1k
f − Frequency − Hz
Figure 24.
10k 20k
G024
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