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LP3943

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通过 SMBUS/I2C 独立控制灯串的 16 通道 RGB/白色 LED 驱动器

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LP5018 正在供货 18 通道 I2C 恒流 RGB LED 驱动器 Newer device with more outputs, larger current and smaller IQ

产品详情

Number of channels 16 LED current per channel (mA) 25 LED configuration Parallel Program memory No Topology Linear Programmable ramp control No Vin (min) (V) 2.3 Vin (max) (V) 5.5 Iout (max) (A) 0.2 Features I2C control Iq (typ) (mA) 0.35 Shutdown current (ISD) (typ) (µA) 2 Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 16 LED current per channel (mA) 25 LED configuration Parallel Program memory No Topology Linear Programmable ramp control No Vin (min) (V) 2.3 Vin (max) (V) 5.5 Iout (max) (A) 0.2 Features I2C control Iq (typ) (mA) 0.35 Shutdown current (ISD) (typ) (µA) 2 Operating temperature range (°C) -40 to 85 Rating Catalog
WQFN (RTW) 24 16 mm² 4 x 4
  • Internal Power-On Reset
  • Active Low Reset
  • Internal Precision Oscillator
  • Variable Dim Rates
    (From 6.25 ms to 1.6 s; 160 Hz to 0.625 Hz)
  • 16 LED Drivers (Multiple Programmable States: ON, OFF, Input, and Dimming at a Specified Rate)
  • 16 Open-Drain Outputs Capable of Driving up to 25 mA per LED
  • Internal Power-On Reset
  • Active Low Reset
  • Internal Precision Oscillator
  • Variable Dim Rates
    (From 6.25 ms to 1.6 s; 160 Hz to 0.625 Hz)
  • 16 LED Drivers (Multiple Programmable States: ON, OFF, Input, and Dimming at a Specified Rate)
  • 16 Open-Drain Outputs Capable of Driving up to 25 mA per LED

The LP3943 is an integrated device capable of independently driving 16 LEDs. This device also contains an internal precision 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 LP3943 contains the ability to dim LEDs in SMBUS/I2C applications where it is required, to cut down on bus traffic.

Traditionally, dimming LEDs using a serial shift register such as 74LS594/5 requires a large amount of traffic on the serial bus. The LP3943 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 to an ON or OFF state, or to cycle a programmed 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.

For all available packages, see the orderable addendum at the end of the data sheet.

The LP3943 is an integrated device capable of independently driving 16 LEDs. This device also contains an internal precision 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 LP3943 contains the ability to dim LEDs in SMBUS/I2C applications where it is required, to cut down on bus traffic.

Traditionally, dimming LEDs using a serial shift register such as 74LS594/5 requires a large amount of traffic on the serial bus. The LP3943 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 to an ON or OFF state, or to cycle a programmed 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.

For all available packages, see the orderable addendum at the end of the data sheet.

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技术文档

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类型 标题 下载最新的英语版本 日期
* 数据表 LP3943 16-Channel RGB, White-LED Driver With Independent SMBUS/I2C String Control 数据表 (Rev. D) PDF | HTML 2016年 11月 4日
白皮书 常见 LED 功能和 LED 驱动器设计注意事项 英语版 2020年 9月 21日
应用手册 How to Select a RGB LED Driver 2019年 8月 8日
用户指南 AN-1300 LP3943 Evaluation Kit (Rev. B) 2013年 4月 30日
应用手册 AN-1715 LP3943/LP3944 as a GPIO Expander (Rev. A) 2013年 4月 30日
应用手册 Application Note 1715 LP3943/LP3944 as a GPIO Expander (cn) 最新英语版本 (Rev.A) 2007年 10月 12日

设计和开发

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评估板

LP3943ISQEV — RGB/白光/蓝光 16 LED 趣味闪烁光驱动器

RGB/White/Blue 16-LED Fun Light Driver

用户指南: PDF
TI.com 上无现货
开发套件

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利用 BOOSTXL-CAPKEYPAD,您可以通过添加一个包含 12 个键的电容式触控数字键盘(具有 LED 背光和接近唤醒功能)来扩展您的 (...)

用户指南: PDF
TI.com 上无现货
驱动程序或库

LP3943SW-LINUX — 用于 LP3943 的 Linux 驱动程序

The Linux driver supports the LP3943 16-LED Fun Light Driver. The Linux driver supports communication through the I2C bus and interfaces with the GPIO and PWM sub-systems.

 

Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:

  • lp3943

 

Linux Source (...)

模拟工具

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封装 引脚 CAD 符号、封装和 3D 模型
WQFN (RTW) 24 Ultra Librarian

订购和质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息:
  • 制造厂地点
  • 封装厂地点

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