參數(shù)資料
型號(hào)： LX1721CDB
英文描述： AudioMAX Products
中文描述： AudioMAX產(chǎn)品
文件頁(yè)數(shù)： 7/14頁(yè)
文件大小： 357K
代理商： LX1721CDB
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 7
Copyright
2000
Rev. 0.1b,2001-09-19
W
M
.
C
AudioMAX
LX1721 / 1722
Class-D Stereo Power Amplifier Controller
P
RELIMINARY
L I N F I N I T Y D I V I S I O N
A P P L I C A T I O N I N F O R M A TI O N
Frequency Synchronization
Two or more LX1721 / LX1722 oscillators can be configured for
synchronous operation. One unit, the master, is programmed for
the desired frequency with the R
PWM
and C
PWM
as usual.
Additional units will be slave units, and their oscillators will be
disabled by leaving the R
PWM
pin disconnected. The CLOCK pin
and the C
PWM
pin of the slave units should be tied to the CLOCK
pin and the C
PWM
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 C
PWM
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
(R
PWM
and C
PWM
selection)
The oscillator is programmed by the external timing components
R
PWM
and C
PWM
. For a nominal frequency of 333kHz, R
PWM
and
C
PWM
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:
ns
C
R
PWM
PWM
320
)
)(
)(
577
.
1
Frequency
+
=
A
P
P
L
I
C
A
T
I
O
N
相關(guān)PDF資料
PDF描述
LX1721EVALKIT AudioMAX Products
LX1722-150EVALKIT AudioMAX Products
LX1722CDB AudioMAX Products
LX2172 Current-Mode SMPS Controller
LX2173 Current-Mode SMPS Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LX1721CDBTR 制造商:MICROSEMI 制造商全稱(chēng):Microsemi Corporation 功能描述:Class-D Stereo Power Amplifier Controller
LX1721EVALKIT 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:AudioMAX Products
LX1722 制造商:MICROSEMI 制造商全稱(chēng):Microsemi Corporation 功能描述:Class-D Stereo Power Amplifier Controller
LX1722-150EVALKIT 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:AudioMAX Products
LX1722CDB 制造商:Microsemi Corporation 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*