LX1705

Microsemi

Analog Mixed Signal Group

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

Page 6

Copyright

© 2007

Rev. 1.2, 2007-03-20

8+8W Stereo Filterless Class-D Amplifier

TM

®

SIMPLIFIED BLOCK DIAGRAM

IN1P

IN1N

-

+

IN2P

IN2N

PWM

OSC

BOOT1P

OUT1P

BOOT1N

OUT1N

AVSS2

ROSC

PVSS1P

MUTE

MUTE

-

+

NFET

H-BRIDGE

PVDD

VREF

VREF

-

+

PWM

-

+

CONTROL BLOCK

-UVLO

-De-Pop

Mute

-Thermal

VREF

STATUS

TMON

STBY

MUTE

TCTRL

V5V

AVSS1

VREF

VREF

MUTE

MUTE

MUTE

BOOT2P

OUT2P

BOOT2N

OUT2N

NFET

H-BRIDGE

PVDD1

PVSS2P

PVDD2

PVSS1N

PVSS2N

Figure 1 –

Simplified Block Diagram