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MGU997

TDA8922TH

C20

330 pF

C10

100 nF

C12

100 nF

C11

220 nF

C9

220 nF

C8

220 nF

on

mute

off

R5

30 k

Ω

C17

470 nF

R7

5.6 k

Ω

C16

470 nF

R6

5.6 k

Ω

J3

C21

330 pF

8

10

12

7

6

1

3

24

18

13

19

23

20

VDDA1

VSSA1

OSC

MODE

VDDA

VSSA

VSSA

9

11

2

5

15

OUT1

BOOT1

BOOT2

OUT2

16

21

22

4

IN1

+

IN1

−

IN2

+

IN2

−

SGND1

SGND

C13

100 nF

C14

220 nF

C15

100 nF

14

17

VDDP1

VSSP1

VDDP

VDDA

VSSP

R4 39 k

Ω

R3

39 k

Ω

Z1

5.6 V

S1

C34

100 nF

C35

220 nF

C36

100 nF

C32

220 nF

C33

47 pF

VSSA2

VDDA2

VSSD

STABI

PROT

HW

VSSA

VDDA

VSSP

C37

100 nF

C38

220 nF

C39

100 nF

C22

15 nF

C23

15 nF

C30

15 nF

C31

15 nF

C26

470 nF

C27

470 nF

R10

4.7

Ω

C24

560 pF

R11

4.7

Ω

C25

560 pF

R12

22

Ω

R13

22

Ω

C28

220 nF

C29

220 nF

L5

27

µH

L6

27

µH

VDDP2

VSSP2

VDDP

SGND

SE 4

Ω

SE 4

Ω

OUT1

−

OUT1

+

OUT2

−

OUT2

+

VSSP

SGND2

J1

in 1

in 2

C18

470 nF

R8

5.6 k

Ω

C19

470 nF

R9

5.6 k

Ω

(2)

BTL 8

Ω

L1

BEAD

L2

BEAD

C1

470

µF

C3

47

µF

C2

470

µF

C6

100 nF

C7

100 nF

VDDP

VSSP

10 k

Ω

9.1 k

Ω

VDDA

VSSA

C4

47

µF

C5

47

µF

GND

VSS

VDD

L3

BEAD

L4

BEAD

+25 V

−25 V

SGND

Fig.10 Single-chip class-D audio amplifier application diagram (reference design for SE and BTL).

(1) BTL: remove In2, R8, R9, C18, C19, C21 and close J3 and J4.

(2) BTL: connect loudspeaker between OUT1+ and OUT2

−.

(4) In case of hum, close J1 and J2.

Every decoupling to ground (plane) must be made as close as possible to the pin.

To handle 20 Hz under all conditions in stereo SE mode, the external power supply

needs to have a capacitance of at least 4700