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LM3535TMX-2ALS

更新时间： 2024-11-14 05:42:03
品牌 Logo 应用领域
美国国家半导体 - NSC 显示驱动器显示器驱动程序和接口接口集成电路
页数 文件大小 规格书
26页 707K
描述
Multi-Display LED Driver with Ambient Light Sensing and Dynamic Backlight Control Compatibility

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LM3535TMX-2ALS 技术参数

生命周期：Transferred包装说明：,
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.27
Is Samacsys：N接口集成电路类型：LED DISPLAY DRIVER
JESD-30 代码：R-PBGA-B20端子数量：20
封装主体材料：PLASTIC/EPOXY封装形状：RECTANGULAR
封装形式：GRID ARRAY认证状态：Not Qualified
表面贴装：YES端子形式：BALL
端子位置：BOTTOMBase Number Matches：1

LM3535TMX-2ALS 数据手册

 浏览型号LM3535TMX-2ALS的Datasheet PDF文件第2页浏览型号LM3535TMX-2ALS的Datasheet PDF文件第3页浏览型号LM3535TMX-2ALS的Datasheet PDF文件第4页浏览型号LM3535TMX-2ALS的Datasheet PDF文件第5页浏览型号LM3535TMX-2ALS的Datasheet PDF文件第6页浏览型号LM3535TMX-2ALS的Datasheet PDF文件第7页 
August 12, 2010  
LM3535  
Multi-Display LED Driver with Ambient Light Sensing and  
Dynamic Backlight Control Compatibility  
General Description  
Features  
The LM3535 is a highly integrated LED driver capable of driv-  
ing 8 LEDs in parallel for large display applications. Indepen-  
dent LED control allows for a subset of the 6 main display  
LEDs to be selected for partial illumination applications. In  
addition to the main bank of 6, the LM3535 is capable of driv-  
ing an additional 2 independently controlled LEDs to support  
Indicator applications.  
Drives up to 8 LEDs with up to 25mA of Diode Current  
■
Each  
External PWM input for Dynamic Backlight Control  
■
■
■
■
■
■
Multi-Zone Ambient Light Sensing (ALS)  
Dual-ALS Sensor Inputs (LM3535-2ALS only)  
ALS Interrupt Reporting  
Independent On/Off Control for all Current Sinks  
The LED driver current sinks are split into three independently  
controlled groups. The primary group can be configured to  
drive up to six LEDs for use in the main phone display. Groups  
B and C are provided for driving secondary displays, keypads  
and indicator LEDs. All of the LED current sources can be  
independently turned on and off providing flexibility to address  
different application requirements.  
128 Exponential Dimming Steps with 600:1 Dimming Ratio  
for Group A (Up to 6 LEDs)  
8 Linear Dimming States for Groups B (Up to 3 LEDs) and  
D1C (1 LED)  
■
Programmable Auto-Dimming Function  
■
■
■
■
■
■
■
■
Up to 90% Efficiency  
The LM3535 provides multi-zone Ambient Light Sensing (1 or  
2 ALS inputs depending on option) allowing autonomous  
backlight intensity control in the event of changing ambient  
light conditions. A PWM input is also provided to give the user  
a means to adjust the backlight intensity dynamically based  
upon the content of the display.  
0.55% Accurate Current Matching  
Internal Soft-Start Limits Inrush Current  
True Shutdown Isolation for LEDs  
Wide Input Voltage Range (2.7V to 5.5V)  
Active High Hardware Enable  
Total Solution Size < 16mm2  
The LM3535 provides excellent efficiency without the use of  
an inductor by operating the charge pump in a gain of 3/2 or  
in Pass-Mode. The proper gain for maintaining current regu-  
lation is chosen, based on LED forward voltage, so that  
efficiency is maximized over the input voltage range.  
Low Profile 20 Bump micro SMD Package  
(1.650mm × 2.055mm × 0.6mm)  
■
Applications  
The LM3535 is available in National’s tiny 20-bump, 0.4mm  
pitch, thin micro SMD package.  
Smart-Phone LED Backlighting  
■
■
■
Large Format LCD Backlighting  
General LED Lighting  
Typical Application Circuit  
30082441  
Minimum Layout  
30082468  
© 2010 National Semiconductor Corporation  
300824  
www.national.com  
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