12W+12W, Low-EMI, Spread-Spectrum,

Stereo, Class D Amplifier

______________________________________________________________________________________

13

MAX9741

0.47

µF

LOGIC INPUTS SHOWN FOR AV = 16dB (SSM).

VIN = LOGIC-HIGH > 2.5V.

*CAPACITOR VOLTAGE RATINGS MAY BE REDUCED WHEN

OPERATING WITH REDUCED SUPPLY VOLTAGES.

INL+

17

16

31

18

29

30

20

22 AGND

24

9

8

32

INL-

FS1

VREG

VREG

VREG

VREG

FS2

G1

G2

SS

REG

0.47

µF

MODULATOR

OSCILLATOR

CHARGE PUMP

C1P

C1

0.1

µF

25V

C1N

0.47

µF

VIH

GAIN

CONTROL

SHUTDOWN

CONTROL

0.01

µF

10V

SHDN

H-BRIDGE

OUTL+

OUTL+

OUTL-

OUTL-

54

53

52

51

PGND

VDD

VDD

PGND

25

6

37 3840 41

3

10V TO 25V

33

µF

25V

2.2

µF

25V*

2.2

µF

25V*

C2

1

µF

25V

CHOLD

VDD

10

0.47

µF

INR+

26

27

INR-

0.47

µF

MODULATOR

H-BRIDGE

OUTR+

OUTR+

OUTR-

OUTR-

48

47

46

45

VREG

Application Circuit