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| 型号： | SC440MLTRT |
| 厂商： | Semtech |
| 文件页数： | 1/1页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT 24-MLPQ |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 6 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 640kHz ~ 960kHz |
| 电源电压： | 4.5 V ~ 21 V |
| 输出电压： | 40V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-MLPQ |
| 供应商设备封装： | 24-MLPQ（4x4） |
| 包装： | 标准包装 |
| 产品目录页面： | 1359 (CN2011-ZH PDF) |
| 其它名称： | SC440MLDKR |
NOT RECOMMENDED FOR NEW DESIGNS: SEE SC440A
SC440
POWER MANAGEMENT
Features
High Efficiency Integrated Driver
for 6-Strings of 30mA LEDs
Description
?
?
?
?
Wide input range 4.5V to 21V
40V maximum output voltage with adjustable OVP for
smaller output capacitor
Drives up to 60 WLEDs in 6 strings
Programmable WLED current for up to 30mA per
The SC440 is a high-efficiency multiple string WLED driver
with an integrated boost converter. It operates over a wide
input range from 4.5V to 21V with a maximum output
voltage of 40V and a 2A internal power switch.
D
E S
D N
N G
E I
M S
M DE
O
C W
E E
R N
T R
Applications
O O
N F
string It can drive up to 40V output voltage in 6 strings with
? 1% string-to-string current matching current up to 30mA per string. The string-to-string current
? 2A integrated power switch matching is 1% typical, 3% maximum and the overall
? Up to 91% efficiency efficiency is greater than 90% due to the low current sense
? 0.2% to 100% PWM dimming voltage and a low-impedance internal power switch. The
? Analog dimming wide PWM dimming range boasts a ratio of 500: 1.
? 800KHz switching frequency for small external com-
ponent The 800kHz switching frequency enables the user to
? Open/short LED protection optimize the external component sizes for high efficiency.
? Short LED protection disable When there are fewer LEDs in each string, users can use
? <1uA shut-down current a lower output voltage protection level which yields an
? Thermal protection allowable reduction in associated costs, size and voltage
? 4mm x 4mm x1mm MLPQ-24 package (WEEE & RoHS ratings of the output capacitor.
compliant)
The SC440 also features a comprehensive open and
short circuit LED protection functions. It disables the
corresponding strings with LED open or LED short
? Medium-sized LCD panel conditions while keeping other strings under normal
? Notebook Display operation. This feature allows LCD panels to remain
? White LED Power Supplies viewable even under LED failure, wire disconnect, or short-
? Sub-Notebook and Tablet Computer Displays circuit conditions. The short LED protection function can
? Portable Media Players be disabled. The internal thermal shutdown protects the
? LCD Monitors IC from overheating at abnormal conditions. The SC440
? Digital Video Cameras is available in a common 4mm x 4mm x1mm MLPQ-24
package.
Typical Application Circuit
Vin (4.5V -21V)
1
2
VIN
SW
SW
VOUT
6 Strings
SCP_EN
EN
FFLAG
OVPIN
OVPRTN
PWM
SC440
IO1-6
6
10
COMP
IOSET
AGND
SS
IOGND
Sept. 24, 2010
EDP
PGND
PGND
www.semtech.com 1
相关PDF资料 |
PDF描述 |
|---|---|
| SC441ATETRT | IC LED DVR CONST CURRENT 20TSSOP |
| SC441CTETRT | IC LED DVR CONST CURRENT 20TSSOP |
| SC441TETRT | IC LED DRIVR WHT BCKLGT 20-TSSOP |
| SC442ULTRT | IC LED DRVR CONST CURRENT 28MLPQ |
| SC443ULTRT | IC LED DRIVR CONST CURRENT 16MLP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SC441 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:High Effi ciency Integrated Driver for 4-Strings of 150mA LEDs |
| SC44-1 | 制造商:Thomas & Betts 功能描述:DEAD- END BRACKET 制造商:Belden Inc 功能描述: |
| SC441303MFU | 制造商:Freescale Semiconductor 功能描述: |
| SC441400CFUER | 制造商:Freescale Semiconductor 功能描述:68HC05B6 LEAD FREE |
| SC441401CFUER | 制造商:Freescale Semiconductor 功能描述:68HC05B6 LEAD FREE |
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