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PDF LX1710 Data sheet ( Hoja de datos )
| Número de pieza | LX1710 | |
| Descripción | Class-D Mono Power Amplifier Controller IC | |
| Fabricantes | Microsemi Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LX1710 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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A MICROSEMI COMPANY
AudioMAX™
LX1710/1711
Class-D Mono Power Amplifier Controller IC
PRELIMINARY
The LX1710/1711 is a monolithic LX1710/1711 is a complete class-D audio
high performance integrated class-D solution.
controller IC designed for high A complete audio amplifier module is
efficiency audio requirements such as available to quickly evaluate the LX1710
portable or battery operated products, controller. Simply connect the amplifier
automotive amplifier, and multimedia to the power source, audio signal, and
applications. This high frequency, full speakers. Reference designs support a
audio bandwidth switching power variety of requirements including multi
amplifier controller, is a completely
new design with dramatically im-
channel
speaker
lsoyasdtesm(2s, subwoofers,a n
d v
a
riou
s
proved performance over Linfinity’s amplifier solution can easily be adjusted
previous generation amplifier pro- for frequency response, optimized for
ducts. Enhancements include better efficiency and performance, or designed to
SNR, lower noise floor, and reduced minimize PCB area and component count.
THD. Combined with output power The LX1710/LX1711 is available in a
MOSFET’s and an output filter, the space saving 28-pin SSOP package.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
Class-D Amplifier Efficiency Comparison
Integrated Switching Class-D
Single Channel Controller IC
Full 20Hz-20kHz Audio
Bandwidth
High Fidelity (LX1710) Or High
Power (LX1711) Versions
Available
Single Supply Operation
THD+N <0.05% Typical
(1Wrms, 1kHz, 4
Maximum Efficiency 80%-85%
Output Power >50Wrms
(LX1711, 4
PSRR –70dB Typical
Differential Input To Minimize
Noise Effects
Supports Multi-Channel
Systems
Complete LXE1710 Amplifier
Evaluation Module Available
28-Pin SSOP Package
Notebook Computers
Desktop Computers
Multimedia Speakers
Automotive Amplifiers And
Headunits
Battery Operated Equipment
(Megaphone, PA System)
Portable Audio (Boom Box)
Wireless Speakers
High Power Subwoofer
Copyright © 2000
Rev. 1.1, 2000-12-01
TJ (°C)
0 to 70
VDD DB Plastic SSOP 28-PIN
7V-15V
7V-25V
LX1710CDB
LX1711CDB
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
1 page  
A MICROSEMI COMPANY
AudioMAX™
LX1710/1711
Class-D Mono Power Amplifier Controller IC
PRELIMINARY
LX1710/11 SIMPLIFIED BLOCK DIAGRAM
VDD 25
IS- 27
CLOCK 28
RPWM 5
CPWM 6
EAOUT 14
EAIN 13
INAMPOUT 9
INPUT - 8
INPUT + 7
MUTE 11
SYNC
OSC
PVDD
+
- 220mV
CLK
UVLO
&
REFERENCE
CURRENT SENSE
5V
R e fe re n c e
5V
R e fe re n c e
ERROR AMP
INPUT AMP
MUTE
MUX
MUTE
FAULT
T IM E R
CLK
SQ
RQ
OUTPUT
DRIVERS
&
LO G IC
FEEDBACK AMP
10 SLEEP
1 VREF
4 V25
18 CN
24 PVDD
26 CP
23 P+
22 N+
21 N-
20 P-
15 FAOUT
17 FBK-
16 FBK+
- LX1710 Block Diagram
Frequency Synchronization
Two or more LX1710 / LX1711 oscillators can be configured for
synchronous operation. One unit, the master, is programmed for
the desired frequency with the RPWM and CPWM as usual.
Additional units will be slave units, and their oscillators will be
disabled by leaving the RPWM pin disconnected. The CLOCK pin
and the CPWM pin of the slave units should be tied to the CLOCK
pin and the CPWM pin of the master unit respectively. In this
configuration, the CLOCK pins of the slave units begin receiving
instead of transmitting clock pulses. Also, the CPWM pins quit
driving the PWM capacitor in the slave units. Note that for
optimum performance, all slave units should be located within a
few inches of the master unit.
Oscillator Configuration (RPWM and CPWM selection)
The oscillator is programmed by the external timing components RPWM
and CPWM. For a nominal frequency of 333kHz, RPWM and CPWM
should be set to 49.9kOhms and 100pF respectively. Note that in order
to keep the slope of the PWM ramp voltage proportional to the supply
voltage, both the ramp peak and valley voltages, and the charge and
discharge currents are proportional to the supply voltage. This keeps
the frequency relatively constant while keeping the slope of the PWM
ramp proportional to the voltage on the VDD pin. For operating
frequencies other than 333kHz, the frequency can be approximated by
the following equation:
Frequency =
1
(0.577)(RPWM )(CPWM ) + 320ns
Copyright © 2000
Rev. 1.1, 2000-12-01
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet LX1710.PDF ] | |
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