LX1720 Datasheet PDF - Microsemi Corporation
| Part Number | LX1720 | |
| Description | SWITCHING CLASS-D/ STEREO POWER AMPLIFIER CONTROLLER IC | |
| Manufacturers | Microsemi Corporation | |
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THE IN F I N I T E P O W E R OF IN N O VAT I O N
AudioMAXTM
LX1720
SWITCHING CLASS-D, STEREO POWER AMPLIFIER CONTROLLER IC
PRODUCTION DATA SHEET
DESCRIPTION
The LX1720 is a highly-integrated,
Switching Class-D Stereo Power Am-
plifier Controller IC with power and
size features that make it ideal for multi-
media computer applications, as well as
other applications where high fidelity
sound is required.
With input voltage ranging from 7V-
15V, the LX1720 is designed to operate
over the full 20Hz to 20kHz audio range.
Signal distortion measurements using
industry standard 1kHz signal yields THD
+ noise levels < 1% (10 watts output).
Its high efficiency (>92%) eliminates the
need for heat sinks — even while deliv-
ering more than 10WRMS across 8 ohms
per channel (20WRMS stereo) with 0.1 ohm
SO-8 power FETs.
The LX1720's output power is limited
only by external FETs and available sup-
ply voltage.
While offering breakthrough perfor-
mance capabilities for notebooks, the
LX1720 is equally attractive for multime-
dia systems or to drive full-size home
theatre speakers.
IMPORTANT: For the most current data, consult LinFinity's web site: http://www.linfinity.com.
PRODUCT HIGHLIGHT
EFFICIENCY COMPARISON OF THE CLASS-D AMPLFIER
100
- Average Power Out for 20sec. approx. 512mW
- Across 8.6 Ohm Load
80
Linfinity's LX1720
Class-D Amplifier
60
40
Highly Integrated
Linear Amplifier
20
0
05
Audio sample from "Hold On Tight"
by Electric Light Orchestra
10
Seconds
15
20
KEY FEATURES
s Integrated Switching (Class-D) Stereo
Power Amplifier Controller IC
s Delivers >10WRMS Across 8Ω /Channel
(20WRMS stereo)
s Output Power Limited Only By External
FETs And Available Supply Voltage
s Will Drive A Wide Range Of Speakers
s High Efficiency (>92%)
s Due To High Efficiency, Power FETs Do Not
Require Heatsinking
s Audio Bandwidth Of 20Hz to 20kHz
s Wide Input Voltage Range Of 7V-15V
s Low Output Signal Distortion <1%
s High Operating Frequency (350kHz) Helps
To Reduce Output Filter Size
s Compact Design Minimizes EMI / RFI
APPLICATIONS / BENEFITS
Notebook Computers:
s Replaces existing internal low power linear
amplifier with a high efficiency Class-D
amplifier
s Enables the use of virtually any external
speaker without amplification
s Precious battery life is extended
s Fully protected power topology can
withstand shorts or external speaker
failures without damage, overheating or
posing fire hazard
Desktop Computers:
s Output power capability of up to 20WRMS
per channel in an area less than 3"x3",
without using expensive heatsinks
s Greatly reduced power supply
requirements when compared to a linear
solution of same power capabilities
s Any speakers can be used including
conventional home stereo speakers
s Very light weight circuitry will not add to
the overall weight of the system
s Multimedia amplifier can be directly
incorporated on the motherboard using
surface mount components
APPLICATION NOTE AN-11
available on our web site
or call 1-800-LMI-7011
Copyright © 1999
Rev. 1.0 9/99
PACKAGE ORDER INFO
TJ (°C)
Maximum
VDD
DB
Plastic
44-pin
SSOP
0 to 70 15V LX1720-01CDB
Note: Available in Tape & Reel.
Append the letter "T" to part number. (i.e. LX1720-01CDBT)
LINFINITY MICROELECTRONICS INC.
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
1
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AudioMAXTM
PRODUCT DATABOOK 1996/1997
SWITCHING CLASS-D, STEREO POWER AMPLIFIER CONTROLLER IC
PRODUCTION DATA SHEET
BLOCK DIAGRAM
LX1720
RT
CT
S LE E P
R B IA S
VDD
CN
E A O U T (R )
E A IN (R )
F B K + (R )
F B K - (R )
F A O U T (R )
IN P U T (R )
M U T E (R )
RPW M
CPW M
E A O U T (L )
E A IN (L )
F B K + (L )
F B K - (L )
F A O U T (L )
IN P U T (L )
M U T E (L )
O SC C LK
U V LO
VREF
B IA S
F eedback
Am p
E rro r A m p
SQ
RQ
C LK
In p u t A m p
VDD
VDD
C LK
E rro r A m p
F eedback
Am p
SQ
RQ
C LK
In p u t A m p
FIGURE 1 — LX1720 Block Diagram
V REG
O U TPU T
D R IV E R S
AND
P R O T E C T IO N
C IR C U IT R Y
PG ND
PVDD
CP
P - (R )
N - (R )
P + (R )
N + (R )
P - (L )
N - (L )
P + (L )
N + (L )
Copyright © 1999
Rev. 1.0 9/99
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for LX1720 electronic component. |
| Information | Total 6 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ LX1720.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| LX1720 | The function is SWITCHING CLASS-D/ STEREO POWER AMPLIFIER CONTROLLER IC. Microsemi Corporation | |
| LX1720-01CDB | The function is SWITCHING CLASS-D/ STEREO POWER AMPLIFIER CONTROLLER IC. Microsemi Corporation | |
| LX1721 | The function is Class-D Stereo Power Amplifier Controller. Microsemi |  |
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