DocID11079 Rev 3

11/16

STA515W

Application information

16

Applications circuits

Figure 7 below shows a typical full-bridge circuit for supplying 20 W + 20 W into 8



speakers with 10% THD at VCC = 18 V.

Figure 7. Typical stereo full-bridge configuration for 20 + 20 W

Figure 8 below shows a single-BTL configuration capable of supplying 40 W into a 4

 load

at 10% THD with VCC = 19 V. This result was obtained with peak power for <1 s using the

STA308+STA515W+STA50X demo board. A PWM modulator as driver is required.

Figure 8. Typical single-BTL configuration for 40 W

L18 22

μH

L19 22

μH

C30

1

μF

C20

100nF

C99

100nF

C101

100nF

C107

100nF

C106

100nF

C23

470nF

C55

1000

μF

C21

100nF

C58

100nF

C58

100nF

R57

10K

R59

10K

R63

20

R98

6

R100

6

C53

100nF

C60

100nF

C31

220nF

C52

330pF

R104

20

C109

330pF

15

M3

IN1A

IN1A

VL

CONFIG

PWRDN

PWR_DN

FAULT

TRISTATE

THWARN

TH_WARN

+3.3V

IN1B

VDD

VDD

VSS

VSS

VCCSIG

VCCSIG

GNDREG

GNDCLEAN

IN2A

IN1B

IN2A

IN2B

PROTECTION

&

LOGIC

REGULATORS

29

23

24

25

27

26

28

30

21

22

33

34

35

36

M2

M5

M4

17

16

OUT1A

GND1A

OUT1A

VCC1A

14

12

10

11

OUT1B

GND1B

OUT1B

VCC1B

13

L113 22

μH

L112 22

μH

C32

220nF

+VCC

C108

470nF

C31

220nF

7

M17

M15

M16

M14

8

9

OUT2A

GND2A

OUT2A

VCC2A

6

4

2

3

OUT2B

GND2B

D00AU1148Bbc

OUT2B

VCC2B

5

19

31

20

GNDSUB

1

IN2B

32

C110

100nF

C111

100nF

R103

6

R102

6

8

Ω

8

Ω

10

μH

10

μH

100nF

FILM

220nF

X7R

220nF

X7R

1

μF

X7R

2200

μF

63V

220nF

680nF

FILM

100nF

FILM

100nF

10K

10K

3.3

1/2W

3.3

1/2W

100nF

X7R

100nF

X7R

Add.

IN1A

IN1A

VL

CONFIG

PWRDN

nPWR_DN

FAULT

TRISTATE

THWARN

TH_WARN

+3.3V

100nF

100nF

X7R

IN1B

VDD

VDD

VSS

VSS

VCCSIG

VCCSIG

GNDREG

GNDCLEAN

IN1B

IN2A

29

23

N.C.

24

25

27

26

28

30

21

22

33

34

35

36

17

16

18

OUT1A

GND1B

OUT1A

VCC1B

10

13

11

OUT1B

GND1A

OUT1B

14

Vcc

330pF

22

Ω

1/2W

4

Ω

GND2A

6

2

12

VCC1A

15

VCC2B

4

VCC2A

7

3

OUT2B

GND2B

D04AU1545bc

OUT2B

5

19

31

20

GNDSUB

1

IN2B

32

8

9

OUT2A

OUT2A

1

μF

X7R

Vcc

220nF