lx1722 Microsemi Corporation, lx1722 Datasheet - Page 2

• Manufacturer Part Number: lx1722
• Description: Class-d Stereo Power Amplifier Controller
• Manufacturer: Microsemi Corporation

Copyright © 2001
Rev. 1.2a,2004-06-10
LX1722 high power version (>65Wrms, 4Ω) with a supply
voltage range of 7V-25V or an LX1721 high fidelity
version (better SNR performance) with a supply voltage
range of 7V-15V.
MOSFET’s, the available supply voltage, and speaker load
primarily limits the maximum output power. The amplifier
provides high fidelity performance and is designed to
operate over the full 20Hz to 20kHz audio band. Signal
distortion measurements yield.
Junction Temperature Calculation: T
The θ
system. All of the above assume no ambient airflow.
DB
The stereo output controller is available in either an
THERMAL RESISTANCE
JA
numbers are guidelines for the thermal performance of the device/pc-board
44-P
I N T E G R A T E D
IN
QSSOP P
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
The current rating of the external
ACKAGE
-
JUNCTION TO AMBIENT
T H E R M A L D A T A
J
P R O D U C T S
= T
A
D E S C R I P T I O N ( C O N T I N U T E D )
+ (P
D
Linfinity Microelectronics Division
x θ
JA
).
, θ
Microsemi
JA
Class-D Stereo Power Amplifier Controller
greater than 80% typical, which eliminates the need for
heatsinks in most applications. The AudioMAX™ solution
requires a single supply voltage, simplifying input power
requirements where a dual supply may not be available. To
minimize potential environmental noise issues and ease the
integration of the amplifier into a variety of applications,
features such as a balanced/differential audio input and a high
power supply rejection ratio help reduce the effects of noise
from the audio signal or power supply.
THD+N levels of 0.06%(1kHz, 1Wrms). Efficiency is
AudioMAX™
50°C/W
P
RODUCTION
RAMPOUT
LAMPOUT
REAOUT
RFAOUT
LFAOUT
LEAOUT
STATUS
RMUTE
LMUTE
CLOCK
CPWM
RPWM
SLEEP
REAIN
LEAIN
VREF
RIN+
P A C K A G E P I N O U T
GND
LIN+
RIN-
V25
LIN-
22
1
DB P
LX1721 / 1722
(Top View)
ACKAGE
44
23
LFBK-
LFBK+
LISN
VDD
CN
PVDD
PGND
LN+
LP+
LP-
LN-
RN-
RP-
RP+
RN+
PGND
CP
PVDD
NC
RISN
RFBK+
RFBK-
Page 2