SC441C
更新时间：2024-09-18 07:52:41
品牌：SEMTECH
描述：High Efficiency Integrated Driver for 4-Strings of 150mA LEDs
概述
数据手册SC441C 概述
High Efficiency Integrated Driver for 4-Strings of 150mA LEDs 高效集成驱动程序的150毫安LED的4串
SC441C 数据手册
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PDF下载SC441C
High Eꢀciency Integrated Driver for
4-Strings of 150mA LEDs
POWER MANAGEMENT
Features
Description
Wide input voltage range from 4.5V to 27V
42V maximum output voltage
The SC441C is a high-eciency multiple string WLED driv-
er with an integrated boost converter. It operates over
a wide input range from 4.5V to 27V with a maximum
output voltage of 42V and a 2.5A internal power switch.
It can drive up to 48 WLEDs in 4 strings with current up
to 150mA per string. The string-to-string current match-
ing is 2% typical, 3% maximum. The overall eciency is
greater than 90% due to the low current sense voltage
and a low-impedance internal power switch. The wide
PWM dimming range boasts a ratio of 500: 1.
Drives up to 48 WLEDs in 4 strings
Programmable LED current for up to 150mA per
string
+/- 2% string-to-string current matching
Up to 90% eꢀciency
Wide 0.2% to 100% PWM dimming range
Possible analog dimming
Integrated 2.5A power switch
700KHz switching frequency for small size
Adjustable OVP for cost-eective output cap selection
Open/short LED protection
The 700KHz switching frequency enables the user to op-
timize the external component sizes for eciency. When
there are fewer than 12 LEDs in each string, users can ad-
just the output voltage protection yielding an allowable
reduction in associated costs, size and voltage ratings of
the output capacitor.
Thermal protection with auto-recovery
Thermally enhanced TSSOP-20 EDP package
Pb Free, Halogen Free, andWEEE/RoHS Compliant
The SC441C also features comprehensive open and short-
circuit LED protection functions. It disables the corre-
sponding strings with LED open or LED short conditions
while maintaining normal operation of other, unaected
LED strings. This feature allows LCD panels to remain
viewable even under LED failure, wire disconnect, or
short-circuit conditions. The internal thermal shutdown
protects the IC from overheating at abnormal conditions.
Applications
Medium-sized LCD panel
Notebook Display
Automotive Car Navigation Display
Sub-Notebook and Tablet Computer Displays
Portable Media Players
The SC441C is available in a thermally-enhancedTSSOP-20
EDP package.
Typical Application Circuit
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www.semtech.com
March 04, 2010
1
SC441C 相关器件
| 型号 | 制造商 | 描述 | 价格 | 文档 |
| SC441CTETRT | SEMTECH | LED Driver, PDSO20, | 获取价格 |
|
| SC441D | SEMTECH | High Efficiency Integrated Driver for 4-Strings of 150mA LEDs | 获取价格 |
|
| SC441DEVB | SEMTECH | High Efficiency Integrated Driver for 4-Strings of 150mA LEDs | 获取价格 |
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| SC441DTETRT | SEMTECH | High Efficiency Integrated Driver for 4-Strings of 150mA LEDs | 获取价格 |
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| SC442 | SEMTECH | 10-Channel, Integrated, High Efficiency 120 White LED Driver | 获取价格 |
|
| SC443 | SEMTECH | High Efficiency Integrated Boost Driver for 3-Strings of 30mA LEDs | 获取价格 |
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| SC4431 | SEMTECH | SHUNT REGULATOR WITH OPEN COLLECTOR OR OUTPUT | 获取价格 |
|
| SC4431CSK-.5.TRT | SEMTECH | Three Terminal Voltage Reference, 1 Output, 1.224V, PDSO5, SOT-23, 5 PIN | 获取价格 |
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| SC4431CSK-.5TRT | SEMTECH | Voltage Reference, BIPolar, PDSO5, | 获取价格 |
|
| SC4431CSK-0.5TR | SEMTECH | SHUNT REGULATOR WITH OPEN COLLECTOR OR OUTPUT | 获取价格 |
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