TPA2080D1 Datasheet, PDF (7/20 Pages) Texas Instruments – 2.2 W Constant Output Power Class-D Audio Amplifier with Class-G Boost Converter

TPA2080D1
www.ti.com
SLOS733 – JANUARY 2012
TYPICAL CHARACTERISTICS
VBAT = 3.6 V, C_I = 1 µF, C_BOOST = 22 µF, L_BOOST = 2.2 µH, EN = VBAT, and Load = 8 Ω + 33 µH, no ferrite bead unless otherwise
specified.
3.0
2.5
2.0
1.5
1.0
0.5 RL = 8 Ω + 33 µH
Gain = 20 dB
THD + N = 10%
f = 1 kHz
THD + N = 1%
0.0
2.3
2.8
3.3
3.8
4.3
4.8
V_BAT − Supply Voltage − V
Figure 1. OUTPUT POWER vs SUPPLY VOLTAGE
5.0
R_L = 4 Ω + 33 µH
4.5 _{Gain = 20 dB}
f = 1 kHz
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
2.5
THD + N = 10%
THD + N = 1%
3.0
3.5
4.0
4.5
5.0
V_BAT − Supply Voltage − V
Figure 2. OUTPUT POWER vs SUPPLY VOLTAGE
1.0
V_BAT = 2.8 V
0.9
V_BAT = 3.0V
0.8
V_BAT = 3.6 V
V_BAT = 4.2 V
0.7
V_BAT = 5.0 V
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0.0
R_L = 8 Ω + 33 µH
Gain = 20 dB
f = 1 kHz
0.5
1.0
1.5
2.0
2.5
P_O − Output Power − W
Figure 3. TOTAL SUPPLY CURRENT vs OUTPUT POWER
1.2
R_L = 4 Ω + 33 µH
Gain = 20 dB
1.0 f = 1 kHz
0.8
0.6
0.4
V_BAT = 2.8 V
V_BAT = 3.0V
0.2
V_BAT = 3.6 V
V_BAT = 4.2 V
V_BAT = 5.0 V
0.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
P_O − Output Power − W
Figure 4. TOTAL SUPPLY CURRENT vs OUTPUT POWER
10
V_BAT = 3.6 V
R_L = 8 Ω + 33 µH
Gain = 20 dB
1
P_O = 225 mW
P_O = 560 mW
P_O = 1 W
P_O = 1.7 W
10
V_BAT = 3.6 V
R_L = 4 Ω + 33 µH
Gain = 20 dB
1
P_O = 62 mW
P_O = 450 mW
P_O = 1.1 W
P_O = 2 W
0.1
0.1
0.01
0.01
0.001
20
100
1k
f − Frequency − Hz
10k 20k
Figure 5. THD+N vs FREQUENCY
0.001
20
100
1k
f − Frequency − Hz
10k 20k
Figure 6. THD+N vs FREQUENCY
Copyright © 2012, Texas Instruments Incorporated
Product Folder Link(s): TPA2080D1
Submit Documentation Feedback
7