Texas Instruments MIXED SIGNAL PRODUCTS TPA0103 User Manual
Page 18
The TPA0103 Audio Power Amplifier Evaluation Module
3-4
Details
Figure 3–3. TPA0103 EVM Schematic Diagram
GND/HS
GND/HS
S2
NC
NC
ROUT+
LOUT+
RLINE IN
LLINE IN
HP/LINE
MUTE OUT
COUT–
COUT+
MODE A
MODE B
GND/HS
GND/HS
RHP IN
LHP IN
RBYPASS
CIN
VDD
VDD
NC
SHUTDOWN
10
9
12
11
6
5
8
7
2
1
4
3
23
22
21
20
19
18
17
16
15
14
13
24
R6
100 k
Ω
R4
20 k
Ω
R3
20 k
Ω
C2
1
µ
F
C1
1
µ
F
R1
20 k
Ω
R2
20 k
Ω
C3
5 pF
VDD
R5
100 k
Ω
C5
2.2
µ
F
S1
COUT+
MODE B
LIN
LINHP
VDD
LOUT+
R10
20 k
Ω
C7
1
µ
F
C9
2.2
µ
F
R9
20 k
Ω
C8
5 pF
C6
1
µ
F
R8
20 k
Ω
S3
LVDD
S4
VDD
ROUT+
RIN
RINHP
VDD
COUT–
MODE A
S5
C10
2.2
µ
F
C11
10
µ
F
R13
200 k
Ω
R15, 20 k
Ω
R18
20 k
Ω
R17
200 k
Ω
C12
5 pF
R16
20 k
Ω
R7
20 k
Ω
R14
200 k
Ω
GND
R11
100 k
Ω
R12, 100 k
Ω
TPA0103
HP/L*
3.2.1
TPA0103 Audio Amplifier IC
The TPA0103 audio amplifier IC is a low-voltage CMOS device intended
primarily for desktop and notebook PCs. In the typical application, the center
channel amplifier is driven from a mix of the L/R inputs to produce a monaural
representation of the stereo signal. The center channel amplifier can be shut
down independently of the L/R output for speaker muting in headphone
applications. The TPA0103 also features a full shutdown function for power
sensitive applications reducing current consumption to 5
µ
A. It is supplied in
a very small 24-pin TSSOP thermal surface-mount package and has been
designed to operate from low supply voltages (between approximately 3 V and
5.5 V) and deliver full power at distortion levels of less than 0.25% THD+N from
a 5-V supply (Figure 3 – 4).