ZHCSHT2B
August 2010 – March 2018
LM3535
PRODUCTION DATA.
1
特性
2
待机功耗
3
说明
Device Images
典型应用
4
修订历史记录
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Charge Pump
7.3.2
Diode Current Sinks
7.3.3
Ambient Light Sensing (ALS) And Interrupt
7.3.4
Dynamic Backlight Control Input (PWM Pin)
7.3.5
LED Forward Voltage Monitoring
7.3.6
Configurable Gain Transition Delay
7.3.7
Hardware Enable (HWEN)
7.4
Device Functional Modes
7.4.1
Shutdown
7.4.2
Standby
7.4.3
Active Mode
7.5
Programming
7.5.1
I2C Compatible Interface
7.5.1.1
Data Validity
7.5.1.2
Start and Stop Conditions
7.5.1.3
Transferring Data
7.5.1.4
I2C Compatible Chip Address
7.5.1.5
Internal Registers of LM3535
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Ambient Light Sensing
8.2.2.1.1
Ambient Light Sensor Block
8.2.2.1.2
ALS Operation
8.2.2.1.2.1
ALS Configuration Example
8.2.2.1.3
ALS Averaging Time
8.2.2.1.4
Ambient Light Current Control + PWM
8.2.2.1.4.1
ALS + PWM Example
8.2.2.2
LED Configurations
8.2.2.3
Maximum Output Current, Maximum LED Voltage, Minimum Input Voltage
8.2.2.3.1
Total Output Current Capability
8.2.2.4
Parallel Connected and Unused Outputs
8.2.2.5
Power Efficiency
8.2.2.6
Power Dissipation
8.2.2.7
Thermal Protection
8.2.2.8
Capacitor Selection
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
器件和文档支持
11.1
接收文档更新通知
11.2
社区资源
11.3
商标
11.4
静电放电警告
11.5
Glossary
12
机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
YFQ|20
MXBG174
散热焊盘机械数据 (封装 | 引脚)
订购信息
zhcsht2b_oa
zhcsht2b_pm
1
特性
驱动多达 8 个 LED,每个 LED 具有高达 25mA 的二极管电流
用于实现动态背光控制的外部 PWM 输入
多区域环境光感应 (ALS)
ALS 中断报告
针对所有电流阱进行独立的开/关控制
针对 A 组(多达 6 个 LED)实现 128 个指数调光步进并具有 600:1 的调光比
针对 B 组(多达 3 个 LED)和 D1C(1 个 LED)实现 8 种线性调光状态
可编程自动调光功能
效率高达 90%
精度为 0.55% 的电流匹配
宽输入电压范围(2.7V 至 5.5V)
高电平有效硬件使能
总解决方案尺寸 < 16mm
2
薄型 20 引脚 DSBGA 封装