User's Manual Stereo Amplifier TPA3008D2
Table Of Contents
- FEATURES
- DESCRIPTION
- APPLICATIONS
- ABSOLUTE MAXIMUM RATINGS
- DISSIPATION RATING TABLE
- RECOMMENDED OPERATING CONDITIONS
- AVAILABLE OPTIONS
- DC ELECTRICAL CHARACTERISTICS
- AC ELECTRICAL CHARACTERISTICS
- TYPICAL CHARACTERISTICS
- APPLICATION INFORMATION
- CLASS-D OPERATION
- Traditional Class-D Modulation Scheme
- TPA3008D2 Modulation Scheme
- Efficiency: LC Filter Required With the Traditional Class-D Modulation Scheme
- Effects of Applying a Square Wave Into a Speaker
- When to Use an Output Filter for EMI Suppression
- Gain setting via GAIN0 and GAIN1 inputs
- INPUT RESISTANCE
- INPUT CAPACITOR, CI
- SHUTDOWN OPERATION
- USING LOW-ESR CAPACITORS
- SHORT-CIRCUIT PROTECTION AND AUTOMATIC RECOVERY FEATURE
- THERMAL PROTECTION
- PRINTED-CIRCUIT BOARD (PCB) LAYOUT
- BASIC MEASUREMENT SYSTEM
- DIFFERENTIAL INPUT AND BTL OUTPUT
- CLASS-D RC LOW-PASS FILTER

www.ti.com
28
24
20
16
10 100 1k
Gain − dB
32
36
f − Frequency − Hz
40
10k
12
8
4
0
80k
V
CC
= 12 V,
R
L
= 8 Ω,
Gain = 32 dB
33 kHz, RC LPF
Gain
Phase
Phase −
50
0
100
−150
−100
−50
150
0
1
2
3
4
5
6
7
8
9
10
11
12
8 9
10 11 12 13 14 15 16 17 18
P
O
− Output Power − W
THD+N = 10%
THD+N = 1%
R
L
= 16
V
CC
− Supply Voltage − V
2
3
4
5
6
7
8
9
8 9 10 11 12 13 14
THD+N = 1%
THD+N = 10%
R
L
= 8
V
CC
− Supply Voltage − V
P
O
− Output Power − W
10
11
12
Power represented by dashed line
may require external heatsinking
0
10
20
30
40
50
60
70
0 1 2 3 4 5 6
P
O
− Output Power (Per Channel) − W
Efficiency − %
80
90
100
7 8 9 10
V
CC
= 18 V,
R
L
= 16
TPA3008D2
SLOS435A – MAY 2004 – REVISED JULY 2004
OUTPUT POWER
vs
CLOSED-LOOP RESPONSE SUPPLY VOLTAGE
Figure 7. Figure 8.
OUTPUT POWER EFFICIENCY
vs vs
SUPPLY VOLTAGE OUTPUT POWER
Figure 9. Figure 10.
9