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
0
10
20
30
40
50
60
70
80
90
100
0 1 2 3 4 5 6 7 8 9 10
Efficiency − %
16
8
P
O
− Total Output Power − W
11 12
V
CC
= 12 V,
LC Filter,
Resistive Load,
Stereo Operation
0
0.2
0.4
0.6
0.8
1
1.2
1.4
0 2 4 6 8 10 12
P
O
− Total Output Power − W
1.6
1.8
2.0
14 16 18 20
LC Filter,
Resistive Load,
Stereo Operation
− Supply Current − AV
CC
V
CC
= 18 V,
R
L
= 16
V
CC
= 12 V,
R
L
= 16
V
CC
= 12 V,
R
L
= 8
−100
−90
−80
−70
−60
−50
−40
−30
−20
−10
0
20 100 1 k 10 k
Crosstalk − dB
f − Frequency − Hz
V
CC
= 12 V,
P
O
= 2.5 W,
Gain = 21.6 dB
R
L
= 8
20 k
−100
−90
−80
−70
−60
−50
−40
20 100 1 k 10 k
f − Frequency − Hz
k
SVR
− Supply Ripple Rejection Ratio − dB
V
CC
= 12 V,
V
(RIPPLE)
= 200 mV
PP
,
R
L
= 8 ,
Gain = 15.6 dB
20 k
−30
−20
−10
0
TPA3008D2
SLOS435A – MAY 2004 – REVISED JULY 2004
EFFICIENCY SUPPLY CURRENT
vs vs
TOTAL OUTPUT POWER TOTAL OUTPUT POWER
Figure 11. Figure 12.
CROSSTALK SUPPLY RIPPLE REJECTION RATIO
vs vs
FREQUENCY FREQUENCY
Figure 13. Figure 14.
10