LM3535

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		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

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LM3535 数据手册

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

300824

www.national.com

12 3 4 5 6 7...26

中文翻译

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与LM3535相关器件

型号	品牌	获取价格	描述	数据表
LM3535TME	NSC	获取价格	Multi-Display LED Driver with Ambient Light Sensing and Dynamic Backlight Control Compatib
LM3535TME/NOPB	TI	获取价格	具有环境光感应和动态背光控制兼容性的多显示屏 LED 驱动器 \| YFQ \| 20 \| -
LM3535TME-2ALS	NSC	获取价格	Multi-Display LED Driver with Ambient Light Sensing and Dynamic Backlight Control Compatib
LM3535TMX	NSC	获取价格	Multi-Display LED Driver with Ambient Light Sensing and Dynamic Backlight Control Compatib
LM3535TMX/NOPB	TI	获取价格	具有环境光感应和动态背光控制兼容性的多显示屏 LED 驱动器 \| YFQ \| 20 \| -
LM3535TMX-2ALS	NSC	获取价格	Multi-Display LED Driver with Ambient Light Sensing and Dynamic Backlight Control Compatib
LM3535TMX-2ALS/NOPB	TI	获取价格	Multi-Display LED Driver with Ambient Light Sensing and Dynamic Backlight Control Compatib
LM3537	TI	获取价格	LM3537 8-Channel WLED Driver with Four Integrated LDOs
LM3537TME	TI	获取价格	LM3537 8-Channel WLED Driver with Four Integrated LDOs
LM3537TME/NOPB	TI	获取价格	具有四个集成 LDO 的 8 通道 WLED 驱动器 \| YFQ \| 30 \| -30 t

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