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LX1725

TM

廬

15W+15W Stereo Class-D Amplifier

Filterless 30W Mono in BTL

P

RODUCTION

D

ATA

S

HEET

DESCRIPTION

KEY FEATURES

12Wx2 @ 4惟 THD+N<1%

16Wx2 @ 4惟 THD+N<10%

25W BTL @ 8惟 THD+N<1%

32W BTL @ 8惟 THD+N<10%

High Efficiency: >90% @8惟

Full Audio Band: 20Hz~20KHz

Low Distortion:

<0.1% @1KHz, 8惟

<0.4% @20~20KHz, 8惟

High Signal-to-Noise Ratio:

>85dB non A-Weighted

Split/Single Power Supply

Wide Supply Voltage Range:

鹵6V

~

鹵15V

or 12V ~ 30V

Low Quiescent Current <20mA

Turn ON/OFF POP Free

STANDBY/MUTE Feature

Programmable Gain

14/20/26dB

Built-in Over Current Protection

Built-in Under Voltage Lockout

Thermal Shut Down

Power Limiting Based on Die

Temperature (gain fold back)

Synchronization

The Microsemi LX1725 is part of a

new generation of fully integrated

stereo class-D amplifiers from

Microsemi. The fully integrated half-

bridge output for each channel works

with both split and single power

supply operation. The outputs can be

bridged to run in BTL (Bridge Tied

Load) mode. In BTL mode, 3-level

modulation is used which allow

operation without an L-C filter to

reduce system cost and area. The

LX1725 has >90% efficiency, with

typical output power up to 15W+15W

in stereo, and 30W BTL into a

4惟

load with less than 1% THD+N. The

amplifier operates over a wide supply

voltage range of 鹵6V to 鹵15V split

supply or 12V to 30V single supply,

and consumes a very little quiescent

current.

The LX1725 features Mute and

Standby modes, over-current protection,

POP-free turn-on and turn-off, under-

voltage lockout, over-voltage protection

and over-temperature protection. All

built-in protection modes allow

automatic recovery when the fault

condition has been cleared. The gain is

pin selectable between 14 / 20 / 26dB to

accommodate different signal source

amplitudes. Several LX1725s can be

easily synchronized together to prevent

beat frequency interference in multi-

channel applications..

The LX1725 comes in a MLPQ 32

pin package with a 7mmx7mm small

outline surface mount.

WWW .

Microsemi

.C

OM

IMPORTANT:

For the most current data, consult

MICROSEMI鈥檚

website:

http://www.microsemi.com

PRODUCT HIGHLIGHT

VCOM

IN1P

1碌F

IN1N

1碌F

32

IN1P

31

30

29

28

27

26

VCOM

25

HIGAIN

+5V

4.7碌F

35V

VCOM

APPLICATIONS

STBY

VPOS

VCOM

Sychronize

FLAG

1碌F 35V

R

LIM

1

2

3

4

5

6

7

VPOSA

24

STBY

VPOS

23

22

21

20

19

18

17

VCOMA

SYNC

FLAG

RILIM

VREF

VPOS1

OUT1

22碌H

VNEG

820nF

22碌H

LX1725

OUTREF2

VNEG1

VNEG2

OUT2

VPOS2

VNEGA

VGND

MASTER

MUTE

820nF

LCD TV, PDP Sets

CD/DVD Combo Player

Combo DVD 5.1 Amplifier

Home Theater System

Computer Speaker System

Game Machine

OUTREF1

IN2M

C

OSC

VNEG

COSC

N.C.

IN2P

HIGAIN

N.C.

IN1M

N.C.

V5V

8

9

10

11

12

N.C.

VNEGA

VPOS

13

14

15

16

IN2P

1碌F

Master / Slave

1碌F

MUTE / GAIN

VNEGA

IN2N

VCOM

LX1725

LX1725

PACKAGE ORDER INFO

T

J

(擄C)

-40 to +85

LQ

Plastic MLPQ

32-PIN

RoHS Compliant / Pb-free

LX1725ILQ

Note: Available in Tape & Reel. Append the letters 鈥淭R鈥?to the part

number. (i.e. LX1725ILQ-TR)

Copyright

漏

2004

Rev. 1.2, 2005-12-06

Microsemi

Integrated Products Division

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

Page

1

next

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