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mgx380

C24

1

µF

C25

1

µF

C10

220 nF

C8

C9

220 nF

22

µF

(100 V)

R26

0

Ω

220 nF

C34

220 nF

C32

470 nF

C12

15 nF

LS1

8

Ω

LS2

8

Ω

R22

22

Ω

C28

100 nF

C27

22

µF (100 V)

R19

5.6

Ω

C28

560 pF

C29

560 pF

C30

560 pF

C31

560 pF

R30

39 k

Ω

L3

33

µH

L4

33

µH

U1

TDA8928J

R31

39 k

Ω

1

7

6

9

12

11

513

810

2

15

3

4

14

16

17

V

SSP

C35

220 nF

C33

470 nF

C13

15 nF

R23

22

Ω

R21

5.6

Ω

C11

220 nF

C38

100 nF

S1

power-ON

C37

220 pF

STAB (U1,9)

STAB (U1,9)

DZ2

3.3 V

DZ1

36 V

R24

R16

1 k

Ω

R10

0

Ω

C17

C15

100 nF

22

µF

(100 V)

C14

22

µF (100 V)

C16

100 nF

R28

0

Ω

R29

0

Ω

R4

1 k

Ω

R35

R34

3.9 k

Ω

R2

10 k

Ω

150

Ω

R8

3.9 k

Ω

R6

220 k

Ω

C22

2.2 nF

C42

2.2 nF

R32

100

Ω

C39

2.2 nF

C41

47 nF

R7

3.9 k

Ω

C40

47 nF

In1

In2

C21

2.2 nF

R13

15 k

Ω

R9

1 k

Ω

R33

3.9

k

Ω

R1

10 k

Ω

R14

15 k

Ω

R25

2 k

Ω

R15

10 k

Ω

R17

5.6 k

Ω

R12

2 k

Ω

R11

2 k

Ω

Q2

BC856

Q1

BC848

0

Ω

C6

470

µF

(35 V)

C7

470

µF

(35 V)

C5

U2A

LM393

1

2

8

4

3

U2B

LM393

7

5

6

J1

21

J3

2

1

J2

21

SW1

OUT1

BOOT1

STAB

BOOT2

OUT2

REL1

POWERUP

DIAG

EN1

EN2

REL2

SW2

R5

220 k

Ω

R3

1 k

Ω

C20

2.2 nF

C19

2.2 nF

C1

100 nF

+14.5 V

−14.5 V

CON1

supply

1

2

3

C2

100 nF

C3

470

µF

(35 V)

L1

bead

bead

L2

C4

470

µF

(35 V)

Fig.5 Single-ended self oscillating class-D system application diagram for TDA8928J.