Texas Instruments manual ±3. TPA0103 EVM Schematic Diagram, 1 TPA0103 Audio Amplifier IC

The TPA0103 Audio Power Amplifier Evaluation Module

Figure 3±3. TPA0103 EVM Schematic Diagram

R15, 20 kΩ

LOUT+

R13

1

24

C8

C3

GND/HS

GND/HS

200 kΩ

5 pF

5 pF

R7

2

23

20 kΩ

R2

NC

NC

20 kΩ

3

22

R14

C1

R1

LOUT+

ROUT+

R8

C6

R4

200 kΩ

1 μF

1

μF

20 kΩ

20 kΩ

4

21

20 kΩ

LIN

LLINE IN

RLINE IN

R9

5

20

LINHP

LHP IN

20 kΩ

R3

RHP IN

R10

R16

C2

6

19

C7

20 kΩ

20 kΩ

1 μF

1 μF

20 kΩ

CIN

RBYPASS

C9

R18

R17

VDD

7

TPA0103

18

2.2 μF

20 kΩ 200 kΩ

C5

VDD

VDD

C10

C11

2.2 μF

8

SHUTDOWN

17

2.2 μF

10 μF

NC

S3

C12

R5

9

16

LVDD

5 pF

MUTE OUT

100 kΩ

HP/LINE

S1

10

15

COUT+

COUT+

R11

COUT±

S2

11

14

100 kΩ

MODE B

VDD

S5

MODE B

MODE A

12

GND/HS

13

S4

GND/HS

VDD

R6

100 kΩ

R12, 100 kΩ

ROUT+

RIN

RINHP

VDD

GND

HP/L*

COUT±

MODE A

3.2.1TPA0103 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

5.5V) and deliver full power at distortion levels of less than 0.25% THD+N from a 5-V supply (Figure 3±4).

3-4 Details