Flat-Panel TVs and Displays
LCD TVs, Multifunction Monitors and Plasma-Display TVs
3-W Stereo Class-D Audio Amplifier
TPA2008D2
Get samples, datasheets, evaluation modules and app reports at:
27
3-W Stereo Class-AB Audio Amplifier
TPA6030A4
Get samples, datasheets, evaluation modules and app reports at:
The TPA2008D2 is an analog-input Class-D audio power amplifier that
will drive 3 W stereo into 3-Ω speakers without a heat sink or large
output filter components. The output power level and integrated DC
volume control are ideal for multifunction monitors (MFMs).
Key Features
• 3 W stereo into 3
Ω
from 5 V with 10% THD+N
• Filter-free modulation
•
Filter not required for efficiency or audio quality, but a low-cost
ferrite bead will reduce EMI
•
Improved efficiency
•
Improved SNR: 96 dB
• Full short-circuit and thermal protection
• DC volume control
Applications
• Multifunction monitors
• LCD TVs
TPA2008D2
LIN-
LIN+
System
Control
0.1
µF
0.1
µF
1
LINN
2
LINP
RINN
24
0.1
µF
RINP
23
22
21
20
19
18
1
µF
0.1
µF
1
µF
ROUT+
GND
RIN-
RIN+
The TPA6030A4 is a fully integrated stereo speaker, stereo headphone
and DC volume control audio solution. Features like integrated
depop circuitry that nulls “pops” and “clicks” during startup and
shutdown transitions and 12-V operation make the TPA6030A4 ideal
for multifunction monitors (MFMs).
Key Features
• 3 W stereo into 16
Ω
from 12 V with 10% THD+N
• Supply voltage range: 7 V to 15 V
• Integrated stereo headphone driver
• DC volume control
• Excellent depop circuitry
• Full short-circuit and thermal protection
• Integrated gain set to 1.5 V/V
Applications
• Multifunction monitors
• LCD TVs
From TV
From CD
Player
0.47µF
RIN1+
RIN2+
R
Mux
1
µF
+
–
Rout +
Rout –
PVcc
PVcc
Vcc
V
CC
= 12V
10
µF
0.47µF
Depop
Circuitry
R
Mux
RIN2–
0.47µF
Input Mux
Control
VCC/2
VDD
LOUT+
GND
1
µF
LOUT-
220 pF
120 kΩ
10
µF
3
SHUTDOWN
BYP
ASS
4
PVDD
PVDD
5
LOUTP
ROUTP
6
PGND
PGND
7
PGND
PGND
8
LOUTN
9
PVDD
10
COSC
11
ROSC
12
AGND
16
Ω
From TV
From CD
Player
0.47µF
RIN1–
220
µF
100 kΩ
0.47
µF
ROUTN
17
16
PVDD
NC
15
VOLUME
14
VDD
13
1
µ
F
System IN2/IN1
Control
Power
Management
Gnd
1 kΩ
ROUT-
VDD
From DAC or
Potentiometers
(DC Voltage)
VOLUME
SEDIFF
SEMAX
CLK
Bypass
32-Step
Volume
Control
System
Control
Output Mode
Control
Shutdown
To
5V
REF
Potentiometers
or DAC reference
1 kΩ
VOLUME
VDD
From TV
From CD
Player
0.47µF
RIN1+
RIN2+
0.47µF
47 nF
L
Mux
VCC/2
+
–
SE/BTL
100 kΩ
220
µF
L
OUT
+
L
OUT
–
16
Ω
GND
From TV
0.47
µF
RIN1–
RIN2–
0.47
µF
L
Mux
TPA2008D2 typical application circuit.
From CD
Player
TPA6030A4 typical application circuit.
Texas Instruments 1Q 2006
Audio Solutions Guide
➔