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參數(shù)資料
| 型號： | LX1688 |
| 廠商： | Microsemi Corporation |
| 英文描述： | MULTIPLE LAMP CCFL CONTROLLER |
| 中文描述： | 多燈CCFL控制器 |
| 文件頁數(shù)： | 8/15頁 |
| 文件大?。?/td> | 624K |
| 代理商： | LX1688 |
Microsemi
Integrated Products, Power Management
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 8
Copyright
2001
Rev. 1.1a, 2003-03-21
W
M
.
C
RangeMAX
LX1688
M
ULTIPLE
L
AMP
CCFL
C
ONTROLLER
I N T E G R A T E D P R O D U C T S
D E T A I L E D D E S C R I P T I O N ( C
O N T I N U E D
)
and may or may not be externally synchronized to
the
LCD video frame rate. It will directly gate the signal
BRT. CPWM should not be used in this case.
Fault Pin
The fault pin is a digital output that indicates that the
maximum numbers of strike attempts has occurred
without lamp ignition. In this condition the FAULT pin
will go active high with typically 20mA drive capability.
Holding the OLSNS pin low (<200mV) will also force
timeout and activate the FAULT pin. When used as a
master, fault condition true does not inhibit master clock
outputs PHA_SYNC and RMP_RST.
I_R Pin
The run mode frequency of the output is one half the
internal ramp frequency, which is proportional to a bias
current set by resistor R
I
of 80.6K. The output frequency
can thus be adjusted by varying the value of R
I-R
, the typical
range from about 50K to 100K. Since there is some
variation in the frequency due to change in the input supply
(VDD) it is recommended that the value of R
I-R
be selected
at the nominal input voltage.
Sleep Mode (ENABLE Signal) and Switched VDD
(VDDSW)
Since the LX1688 can be used in portable battery
operated systems, a very low power sleep mode is included.
The IC will consume less than 10μA quiescent current from
both the VDD and VDD_P pins combined, when the
ENABLE pin is deactivated. The polarity of the ENABLE
pin is programmable by the BEPOL input (see table 1). In
addition the controller provides a switched supply pin
VDDSW this output supplies at least 10mA at VDD
─
.2V
for external circuitry. This output can be used to power
additional circuitry that can be enabled with the controller.
B I A S & T I M I N G E Q U A T I O N S
Formula 1:
Triangular Wave Generator Frequency, F
TRI
[Hz]
)
25
(
1
I
C
R
×
F
TRI
TRI
×
=
Formula 2:
Lamp Frequency (AOUT’s switching frequency), F
LAMP
[Hz]
12
200
1
F
LAMP
I
R
e-
×
=
Formula 3:
Minimum Current Error Amp Bandwidth, BW
IEA_MIN
[Hz]
000048
.
C
B
WIEA_MIN
ICOMP
=
Formula 4:
Minimum Voltage Error Amp Bandwidth, B
WVEA_MIN
[Hz]
000048
C
0
B
WVEA_MIN
VCOMP
.
=
Formula 5:
Softstart time, T
SS
[sec]
T
SS
VCOMP
C
,
,
×
=
000
500
4
Formula 6:
Minimum Power-on Reset Pulse Width, T
MIN_POR
T
MIN_POR
=
[sec]
6
3
POR
C
e
×
D
E
S
C
R
I
P
T
I
O
N
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| LX1688_06 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:Multiple Lamp CCFL Controller |
| LX1688CPW | 功能描述:IC CTRLR CCFL BACKLIGHT 24TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 照明，鎮(zhèn)流器控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:CCFL 控制器 頻率:40 ~ 80 kHz 電流 - 電源:5mA 電流 - 輸出:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR) 其它名稱:90-3991V+V01 |
| LX1688CPW-TR | 制造商:Microsemi Corporation 功能描述:CCFL DRVR 5.5V 24TSSOP - Tape and Reel |
| LX1688IPW | 功能描述:IC CTRLR CCFL BACKLIGHT 24TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 照明，鎮(zhèn)流器控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:CCFL 控制器 頻率:40 ~ 80 kHz 電流 - 電源:5mA 電流 - 輸出:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR) 其它名稱:90-3991V+V01 |
| LX1688IPW-TR | 制造商:Microsemi Corporation 功能描述:CCFL Controller 3.3V/5V 24-Pin TSSOP T/R 制造商:Microsemi Corporation 功能描述:CCFL DRVR 5.5V 24TSSOP - Tape and Reel |
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