LX1708

Microsemi

Integrated Products Division

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 8

Copyright

© 2004

Rev.1.2, 2007-01-05

15+15W Stereo Filterless Class-D Amplifier

TM

®

APPLICATION CIRCUITS

Part

C3 0.47µF

STBY

IN1P

IN1N

N/C

N/C

IN2N

IN2P

MUTE

TCTRL

TMON

AVSS2

ROSC

VREF

AVSS1

V5V

STATUS

U1

LX1708

SW1

SLEEP

+5V

C4 0.47µF

INR+

INR-

JP1

HEADER 1

RCA Jack

J1

C5 0.47µF

C6 0.47µF

INL-

INL+

JP2

HEADER 2

RCA Jack

J2

+5V

M

L

N

C7 1µF

TP1

GND

C8

1µF

C10 1µF

C9

1µF

TP2

1P

TP3

1N

CR2

1N5817

CR1

1N5817

OUTR+

OUTR-

R8 470

C23

4.7nF

C24

2.2nF

R9 470

TP4

RT-P

R6 470

C21

4.7nF

C22

2.2nF

R7 470

TP5

RT-N

C13 1µF

C14

1µF

OUTL+

OUTL-

R4 470

C19

4.7nF

C20

2.2nF

R5 470

TP1

LEFT-P

R2 470

C17

4.7nF

C18

2.2nF

R3 470

TP10

LEFT-N

C15

1µF

TP9

2N

CR8

1N5817

CR7

1N5817

C16 1µF

TP7

GND

TP8

2P

Header

3x2

R1 25K

C11 1µF

C12 1µF

+5V

TP6 STATUS

C1

47µF 25V

C2

22µF 6.3V

+5V

TEST PURPOSE

TEST PURPOSE

TEST PURPOSE

TEST PURPOSE

+VIN

RTN

TB1

+5V

RTN

TB1

Note 1: CR1, CR2, CR7, CR8 can be used for lower distortion performance.

Figure 3 –

Typical Application