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參數(shù)資料
| 型號(hào)： | LX1744 |
| 廠商： | Microsemi Corporation |
| 元件分類： | LED驅(qū)動(dòng)器 |
| 英文描述： | Dual Output Boost ? LED Driver / LCD Bias |
| 中文描述： | 雙輸出升壓？ LED驅(qū)動(dòng)器/ LCD偏置 |
| 文件頁(yè)數(shù)： | 3/16頁(yè) |
| 文件大小： | 571K |
| 代理商： | LX1744 |
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LX1744
P
RODUCTION
D
ATASHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
W
M
.
C
Dual Output Boost – LED Driver / LCD Bias
I N T E G R A T E D P R O D U C T S
Copyright
2000
Rev. 1.1b, 2005-03-01
F U N C T I O N A L P I N D E S C R I P T I O N
Name
Description
IN
Unregulated IC Supply Voltage Input – Input range from +1.6V to 6.0V. Bypass with a 1
μ
F or greater capacitor
for operation below 2.0V.
DRV
LED MOSFET Gate Driver – Connects to an external N-Channel MOSFET.
SRC
LED MOSFET Current Sense Input - Connects to the External N-Channel MOSFET Source.
OVP
Over Voltage Programming Pin – Connects to a resistor divider between the output load and GND to set the
maximum output voltage. OVP has a voltage threshold of 1.2V
LFB
LED Current Feedback Input – Connects to a current sense resistor between the LED output load and GND to
set the LED drive current.
GND
Common terminal for ground reference.
BRT
LED Dimming Signal Input – Provides the internal reference, via an internal filter and gain resistor, allowing for a
dynamic output LED current adjustment that corresponds to the PWM input signal duty cycle. Either a PWM
signal or analog voltage can be used. The actual BRT pin voltage range is from V
IN
to GND. Minimize the
current sense resistor power dissipation by selecting a range for V
BRT
= 0.0V to 0.5V.
REF
Buffered Reference Output – Connected to the internal bandgap reference voltage of 1.2V.
SW
LCD Bias Inductor Switch Connection – Internally connected to the drain of a 28V N-channel MOSFET. SW is
high impedance in shutdown.
FB
Feedback Input – Connect to a resistive divider network between the output and GND to set the output voltage
between V
CC
(IN) and 25V. The feedback threshold is 1.29V.
LCD Bias Adjustment PWM Signal Input – Connect to an RC filter allowing for dynamic output voltage adjustment
>
±
15%, corresponding to a varying duty cycle. Either a PWM signal or analog voltage can be used. The ADJ
input voltage range is from 0.9V to V
IN
DC. The ADJx pin should be connected to ground when the internal
reference is used.
LED Driver Active-Low Shutdown Input – A logic low shuts down the LED driver circuitry and reduces the supply
current by 60
μ
A (Typ). Pull
LSHDN
high for normal operation.
LCD Bias Active-Low Shutdown Input – A logic low shuts down the LCD Bias circuitry and reduces the supply
current by 60
μ
A (Typ). Pull
SHDNx
high for normal operation.
ADJ
LSHDN
SHDNx
CS
Current-Sense Amplifier Input – Connecting a resistor between CS and GND sets the peak inductor current limit.
P
A
C
K
A
G
E
D
A
T
A
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| LX1744 EVAL KIT | 制造商:Microsemi Corporation 功能描述:LED BACKLIGHT CONTROLLERS AND DRIVERS - Bulk |
| LX1744CLQ | 功能描述:IC LED DRVR WT/CLR BCKLGT 16MLPQ RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅(qū)動(dòng)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:- 恒定電流:- 恒定電壓:- 拓?fù)?升壓（升壓），切換式電容器（充電泵） 輸出數(shù):1 內(nèi)部驅(qū)動(dòng)器:是 類型 - 主要:背光 類型 - 次要:白色 LED 頻率:625kHz ~ 875kHz 電源電壓:2.7 V ~ 5.3 V 輸出電壓:5V 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-µMAX 包裝:帶卷 (TR) 工作溫度:-40°C ~ 85°C |
| LX1744CPW | 功能描述:IC LED DRVR WT/CLR BCKLT 14TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅(qū)動(dòng)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:- 恒定電流:- 恒定電壓:- 拓?fù)?升壓（升壓），切換式電容器（充電泵） 輸出數(shù):1 內(nèi)部驅(qū)動(dòng)器:是 類型 - 主要:背光 類型 - 次要:白色 LED 頻率:625kHz ~ 875kHz 電源電壓:2.7 V ~ 5.3 V 輸出電壓:5V 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-µMAX 包裝:帶卷 (TR) 工作溫度:-40°C ~ 85°C |
| LX1745 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:Triple Output Boost ? LED Driver / LCD Bias |
| LX1745 EVAL KIT | 制造商:Microsemi Corporation 功能描述:LED BACKLIGHT CONTROLLERS AND DRIVERS - Bulk |
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