STA543SA

4 Evaluation Board

CD00061065

11/23

4

Evaluation Board

In addition to the Test Board shown in

Figure 3. intended also to evaluate the STA540SA

Amplifier, it is possible to order the dedicated STA543SA evaluation board of

Figure 6.

The PCB layout (single layer) is shown in

Figure 7.

4.1

Crcuit description

With this board it is possible to amplify three analog signals Left, Right, Subwoofer coming

from separated sources or to generate the BASS part to be sent to the Subwoofer via a

passive crossover network.

All the three channels have a Linear DC volume Control.

Figure 6.

Evaluation Board Schematic

+5V

+5V

+5V

+5V

+5V

100K

VOL.

CONTR. 1

VOL.

CONTR. 2

VOL.

CONTR. 3

P1

100K

P1

100K

C7

100nF

C7

100nF

R7

N.M.

R7

N.M.

R4

300K

R4

300K

OUTR

OUTR

SGND

SGND

OUT3+

OUT3+

C6

100nF

C6

100nF

R5

300K

R5

300K

R9

10K

R9

10K

VS

VS

C14

47µF 25V

C14

47µF 25V

C13

1µF

C13

1µF

R1

10K

R1

10K

C10

0.47µF

C10

0.47µF

PGND

PGND

+ C3

1000µF 25V

+ C3

1000µF 25V

C8

0.22µF

C8

0.22µF

C5

1000µF 25V

C5

1000µF 25V

R2

N.M.

R2

N.M.

C4

0.22µF

C4

0.22µF

C11

N.M.

C11

N.M.

OUTL

OUTL

SGND

SGND

GND

GND

R3

N.M.

R3

N.M.

+5V

+5V

OUT1

1

OUT2

2

IN1

4

IN2

5

VOL1

6

VOL2

7

SVR

8

VOL3

13

VOL_OUT

14

IN3

15

AMP_IN

16

OUT3-

18

OUT3+

19

U1

U1

+ C1

10µF 25V

+ C1

10µF 25V

IN1(L)

IN1(L)

PGND

PGND

C9

1000µF 25V

C9

1000µF 25V

IN2(R)

IN2(R)

C12

100nF

C12

100nF

IN3(SW)

IN3(SW)

R6

N.M.

R6

N.M.

P2

100K

P2

100K

OUT3-

OUT3-

ST-BY

ST-BY

C2

100nF

C2

100nF

R8

300K

R8

300K

DIAG

DIAG