The TPA0103 Audio Power Amplifier Evaluation Module
3-4
Details
Figure 3–3.TPA0103 EVM Schematic Diagram
GND/HSGND/HS
S2
NCNC
ROUT+LOUT+
RLINE INLLINE IN
HP/LINEMUTE OUT
COUT–COUT+
MODE AMODE B
GND/HSGND/HS
RHP INLHP IN
RBYPASSCIN
VDD
VDD
NCSHUTDOWN
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 kΩ
R4
20 kΩ
R3
20 kΩ
C2
1 µF
C1
1 µFR1
20 kΩ
R2
20 kΩ
C3
5 pF
VDD
R5
100 kΩ
C5
2.2 µF
S1
COUT+
MODE B
LIN
LINHP
VDD
LOUT+
R10
20 kΩC7
1 µF
C9
2.2 µF
R9
20 kΩ
C8
5 pF
C6
1 µF
R8
20 kΩ
S3
LVDD
S4
VDD
ROUT+
RIN
RINHP
VDD
COUT–
MODE A
S5
C10
2.2 µFC11
10 µF
R13
200 kΩ
R15, 20 kΩ
R18
20 kΩ
R17
200 kΩ
C12
5 pF
R16
20 kΩ
R7
20 kΩ
R14
200 kΩ
GND
R11
100 kΩ
R12, 100 kΩ
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 µA. 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).