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(1) For 8

Ω BTL and f

For 8

Ω BTL and f

For 4

Ω BTL and f

Fig 8.

Typical application diagram using a single (asymmetrical) supply voltage.

001aaa628

TDA8939TH

DIGITAL PWM

CONTROLLER

R13

47

Ω

CGND

R10

DIAGN

47

Ω

R9

ENABLE

47

Ω

POWERUP

OUT1

BOOT1

CON3

OUTPUT

STAB1

R7

47

Ω

R5

R2

1 k

Ω

R4

10

Ω

R6

10

Ω

(0.25 W)

R8

22

Ω

(1 W)

C12

220 nF

C3

470

µF

(63 V)

C9

220 pF

C10

100 nF

C11(1)

L2 (1)

L3(1)

C15

100 nF

C13

100 nF

STAB2

BOOT2

OUT2

n.c.

C14

100 nF

V

+

V

+

C8

220 pF

R3

10

Ω

R1

10 k

Ω

9

112

20

24

17

13

16

15

18

19

22

21

8

11

7

6

5

4

2

310

23

14

47

Ω

C4

C1

100 nF

C2

1000

µF

(63 V)

100 nF

C5

100 nF

C6

100 nF

C7

100 nF

R11

47

Ω

V

+

power stage on/off

overload

R14

10

Ω

(0.25 W)

C17

220 pF

V

+

C16

220 pF

R12

22

Ω

(1 W)

C19

220 nF

C18(1)

1

2

CON1

SUPPLY

+50 V

L1

BEAD

1

2