LX1721_04 Datasheet, PDF (1/14 Pages) Microsemi Corporation – Class-D Stereo Power Amplifier Controller

INTEGRATED PRODUCTS
AudioMAX™
LX1721 / 1722
Class-D Stereo Power Amplifier Controller
PRODUCTION
DESCRIPTION
The LX1721/1722 is a monolithic high A complete audio amplifier module is
performance Class-D stereo controller IC available to quickly evaluate the LX1721
designed for high efficiency or space or LX1722 stereo controller. Simply
constrained audio requirements such as connect the amplifier to the power source,
portable or battery operated products, audio signal, and speakers. Reference
automotive amplifiers, and multi-channel designs support a variety of requirements
multimedia computer and video game including multi channel systems,
applications. This high frequency, full subwoofers, satellite / subwoofer com-
audio bandwidth switching power binations and various speaker loads (2Ω,
amplifier controller offers dramatically 4Ω, 8Ω). The versatile amplifier solution
improved performance over Linfinity’s can easily be adjusted for frequency
previous generation amplifier products. response, optimized for efficiency and
Enhancements include higher output performance, or designed to minimize
power, better SNR, lower noise floor, and PCB area and component count. The
reduced THD. Combined with output LX1721/1722 is available in a space
power MOSFET’s and an output filter, the saving 44-pin QSOP package.
LX1721/1722 is a complete Class-D audio ^{(Continued Next Page)}
solution.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
7V - 25V
Channel
1
Channel 2
IN +
IN -
LX1722
Stereo
IN +
IN -
CLOCK
PRODUCT HIGHLIGHT
FETs
Left
Output Power vs. Supply Voltage
1kHz, 4Ω, THD+N=1%
FETs
Right
2Ω, 4Ω, 8Ω
Channel 3
LX1711
Mono
IN +
IN -
FETs
Subwoofer
2.1 Audio Amplifier
Configuration
KEY FEATURES
ƒ Integrated Switching Class-D
Stereo Controller IC
ƒ Full 20Hz-20kHz Audio
Bandwidth
ƒ High Fidelity (LX1721) Or
High Power (LX1722)
Versions Available
ƒ Single Supply Operation
ƒ THD+N <0.06% Typical
(1Wrms, 1kHz, 4Ω)
ƒ Maximum Efficiency 80%-
85%
ƒ Output Power >60Wrms per
Channel (LX1722, 4Ω, 1%
THD+N)
ƒ PSRR –70dB Typical
ƒ Differential Input To Minimize
Noise Effects
ƒ Supports Multi-Channel
Systems
ƒ Complete LXE1721or
LXE1722 Amplifier Evaluation
Module Available
ƒ 44-Pin QSOP Package
APPLICATIONS
ƒ Multimedia Speakers
ƒ Surround Sound Game
Systems
ƒ Notebook Computers
ƒ Desktop Computers
ƒ Automotive Amplifiers And
Head units
ƒ Battery Operated Equipment
(Megaphone, Public Address
System)
ƒ Portable Audio (Boom Box)
ƒ Wireless Speakers
ƒ High Power Subwoofer
ƒ Automotive Audio Systems
ƒ Home Theatre
Copyright © 2001
Rev. 1.2a,2004-06-10
PACKAGE ORDER INFO
T_J (°C)
V_DD
Plastic QSOP
DB _44-Pin
-20 to 70
7V – 15V
LX1721CDB
-20 to 70
7V – 25V
LX1722CDB
Note: Available in Tape & Reel.
Append the letters “TR” to the part number. (i.e. LX1722CDBTR)
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
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