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SC4539ULTRT

更新时间： 2024-11-23 03:15:43
品牌 Logo 应用领域
商升特 - SEMTECH 转换器升压转换器
页数 文件大小 规格书
14页 245K
描述
High Effi ciency Boost Converter for up to 6 LEDS

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中文翻译

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SC4539ULTRT 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：SOIC
包装说明：2 X 2 MM, 0.60 MM HEIGHT, ROHS COMPLIANT, MLPD-8针数：8
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.74
接口集成电路类型：LED DISPLAY DRIVERJESD-30 代码：S-XDSO-N8
JESD-609代码：e4长度：2 mm
湿度敏感等级：1复用显示功能：NO
功能数量：1区段数：1
端子数量：8最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：UNSPECIFIED
封装代码：HVSON封装形状：SQUARE
封装形式：SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：0.6 mm
最大供电电压：5.5 V最小供电电压：2.8 V
标称供电电压：3.6 V表面贴装：YES
温度等级：INDUSTRIAL端子面层：NICKEL PALLADIUM GOLD
端子形式：NO LEAD端子节距：0.5 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：2 mmBase Number Matches：1

SC4539ULTRT 数据手册

 浏览型号SC4539ULTRT的Datasheet PDF文件第2页浏览型号SC4539ULTRT的Datasheet PDF文件第3页浏览型号SC4539ULTRT的Datasheet PDF文件第4页浏览型号SC4539ULTRT的Datasheet PDF文件第5页浏览型号SC4539ULTRT的Datasheet PDF文件第6页浏览型号SC4539ULTRT的Datasheet PDF文件第7页 
SC4539  
High Efficiency Boost Converter  
for up to 6 LEDS  
POWER MANAGEMENT  
Features  
Description  
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Input voltage range — 2.8V to 5.5V  
Current-mode PWM control — 800kHz  
Programmable LED current up to 30mA  
Soft-start to reduce in-rush current  
PWM dimming — 100Hz to 50kHz  
PWM dimming at ISET — Analog and filtered  
Over-voltage protection — 25V (max.)  
Under-voltage lockout (UVLO)  
Thermal shutdown  
Shutdown current — <1μA  
Ultra-thin package — 2mm x 2mm x 0.6mm  
Lead-free package, WEEE and RoHS compliant  
The SC4539 is designed to regulate current for a series  
chain of white LEDs in LCD backlighting applications  
where small size and high efficiency are priorities. This  
device integrates an 800kHz current-mode PWM boost  
converter and a 30mA programmable low dropout current  
sink regulator.  
An external resistor sets the LED current up to 30mA.  
PWM dimming (100Hz to 50kHz) may be applied directly  
to the enable (EN) pin, or dimming can be controlled by  
applying an analog signal to the ISET circuit. The boost  
circuit can output up to 22V (guaranteed) to drive up to 6  
LEDs in series. The current regulator protects against  
shorts between the BL and OUT pins and also eliminates  
backlight glow during shutdown when using LEDs with  
high leakage. Under-voltage lockout and thermal shut-  
down provide additional protection. A small external  
capacitor and series resistor control soft-start and loop  
compensation. Over-voltage detection protects the  
SC4539 if the LED pin is floating or shorted to ground.  
Applications  
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White LED Display Backlight Driver  
Smartphones and PDAs  
Cellular Handsets  
MP3 and Portable Media Players  
DSC, GPS, Satellite Radio, Game Players  
The SC4539 is available in an MLPD-8 pin 2mm x 2mm x  
0.6mm package, with a rated temperature range of -40°C  
to +85°C.  
Typical Application Circuit  
D
L1  
LX  
COUT  
2.8 to  
5.5V  
IN  
OUT  
CIN  
SC4539  
Enable and  
EN  
PWM dimming  
RISET  
ISET  
COMP  
CCOMP  
RCOMP  
BL  
GND  
September 5, 2007  
1
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中文翻译

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