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LP3944ISQ PDF预览

LP3944ISQ

更新时间: 2024-11-14 23:16:47
品牌 Logo 应用领域
美国国家半导体 - NSC 驱动器
页数 文件大小 规格书
12页 247K
描述
RGB/White/Blue 8-LED Fun Light Driver

LP3944ISQ 技术参数

是否Rohs认证: 不符合生命周期:Transferred
Reach Compliance Code:not_compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.08
数据输入模式:SERIAL接口集成电路类型:LED DISPLAY DRIVER
JESD-30 代码:S-XQCC-N24JESD-609代码:e0
长度:4 mm湿度敏感等级:3
复用显示功能:NO功能数量:1
区段数:8端子数量:24
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:VQCCN
封装等效代码:LCC24,.16SQ,20封装形状:SQUARE
封装形式:CHIP CARRIER, VERY THIN PROFILE峰值回流温度(摄氏度):260
电源:2.5/5 V认证状态:Not Qualified
座面最大高度:0.8 mm子类别:Display Drivers
最大供电电压:5.5 V最小供电电压:2.3 V
标称供电电压:5 V表面贴装:YES
温度等级:INDUSTRIAL端子面层:Tin/Lead (Sn/Pb)
端子形式:NO LEAD端子节距:0.5 mm
端子位置:QUAD处于峰值回流温度下的最长时间:40
宽度:4 mmBase Number Matches:1

LP3944ISQ 数据手册

 浏览型号LP3944ISQ的Datasheet PDF文件第2页浏览型号LP3944ISQ的Datasheet PDF文件第3页浏览型号LP3944ISQ的Datasheet PDF文件第4页浏览型号LP3944ISQ的Datasheet PDF文件第5页浏览型号LP3944ISQ的Datasheet PDF文件第6页浏览型号LP3944ISQ的Datasheet PDF文件第7页 
November 2003  
LP3944  
RGB/White/Blue 8-LED Fun Light Driver  
General Description  
Features  
n Internal power-on reset  
n Active low reset  
LP3944 is an integrated device capable of independently  
driving 8 LEDs. This device also contains an internal preci-  
sion oscillator that provides all the necessary timing required  
for driving each LED. Two prescaler registers along with two  
PWM registers provide a versatile duty cycle control. The  
LP3944 contains the ability to dim LEDs in SMBUS/I2C  
applications where it is required to cut down on bus traffic.  
n Internal precision oscillator  
n Variable dim rates (from 6.25 ms to 1.6s;  
160 Hz–0.625 Hz)  
Key Specifications  
Traditionally, to dim LEDs using a serial shift register such as  
74LS594/5 would require a large amount of traffic to be on  
the serial bus. LP3944 instead requires only the setup of the  
frequency and duty cycle for each output pin. From then on,  
only a single command from the host is required to turn each  
individual open drain output ON, OFF, or to cycle a pro-  
grammed frequency and duty cycle. Maximum output sink  
current is 25 mA per pin and 200 mA per package. Any ports  
not used for controlling the LEDs can be used for general  
purpose input/output expansion.  
n 8 LED driver (multiple programmable stateson, off,  
input, and dimming at a specified rate)  
n 8 Open drain outputs capable of driving up to 25 mA per  
LED  
Applications  
n Customized flashing LED lights for cellular phones  
n Portable Applications  
n Digital Cameras  
n Indicator Lamps  
n General purpose I/O expander  
n Toys  
Typical Application Circuit  
20085301  
© 2003 National Semiconductor Corporation  
DS200853  
www.national.com  

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