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LM3535 PDF预览

LM3535

更新时间: 2024-01-23 22:53:23
品牌 Logo 应用领域
美国国家半导体 - NSC 驱动器显示器
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

LM3535 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active包装说明:VFBGA, BGA20,4X5,16
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01Factory Lead Time:1 week
风险等级:1.38数据输入模式:SERIAL
输入特性:STANDARD接口集成电路类型:LED DISPLAY DRIVER
JESD-30 代码:R-PBGA-B20JESD-609代码:e1
长度:2.015 mm湿度敏感等级:1
复用显示功能:NO功能数量:1
区段数:8端子数量:20
最高工作温度:85 °C最低工作温度:-30 °C
输出特性:CONSTANT-CURRENT封装主体材料:PLASTIC/EPOXY
封装代码:VFBGA封装等效代码:BGA20,4X5,16
封装形状:RECTANGULAR封装形式:GRID ARRAY, VERY THIN PROFILE, FINE PITCH
峰值回流温度(摄氏度):260电源:3/5 V
认证状态:Not Qualified座面最大高度:0.675 mm
子类别:Display Drivers最大压摆率:4.38 mA
最大供电电压:5.5 V最小供电电压:2.7 V
标称供电电压:3.6 V电源电压1-最大:4 V
电源电压1-分钟:2 V表面贴装:YES
温度等级:OTHER端子面层:Tin/Silver/Copper (Sn/Ag/Cu)
端子形式:BALL端子节距:0.4 mm
端子位置:BOTTOM处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:1.61 mm最小 fmax:1.33 MHz

LM3535 数据手册

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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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