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LP3944

正在供货

RGB/白光/蓝光 8 LED 闪烁光驱动器

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产品详情

Number of channels 8 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 8 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 1.6s; 160 Hz–0.625 Hz)

Key Specifications

  • 8 LED Driver (Multiple Programmable States—On, Off, Input, and Dimming at a Specified Rate)
  • 8 Open Drain Outputs Capable of Driving up to 25 mA per LED

All trademarks are the property of their respective owners.

  • Internal Power-on Reset
  • Active Low Reset
  • Internal Precision Oscillator
  • Variable Dim Rates (from 6.25 ms to 1.6s; 160 Hz–0.625 Hz)

Key Specifications

  • 8 LED Driver (Multiple Programmable States—On, Off, Input, and Dimming at a Specified Rate)
  • 8 Open Drain Outputs Capable of Driving up to 25 mA per LED

All trademarks are the property of their respective owners.

LP3944 is an integrated device capable of independently driving 8 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 LP3944 contains the ability to dim LEDs in SMBUS/I2C applications where it is required to cut down on bus traffic.

Traditionally, to dim LEDs using a serial shift register such as 74LS594/5 would require a large amount of traffic to be on the serial bus. LP3944 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 ON, OFF, 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.

LP3944 is an integrated device capable of independently driving 8 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 LP3944 contains the ability to dim LEDs in SMBUS/I2C applications where it is required to cut down on bus traffic.

Traditionally, to dim LEDs using a serial shift register such as 74LS594/5 would require a large amount of traffic to be on the serial bus. LP3944 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 ON, OFF, 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.

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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 LP3944 RGB/White/Blue 8-LED Fun Light Driver 数据表 (Rev. A) 2013年 4月 6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-1344 LP3944 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

如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。

驱动程序或库

LP3944SW-LINUX — 用于 LP3944 的 Linux 驱动程序

The Linux driver supports the LP3944 8-LED Fun Light Driver. The Linux driver supports communication through the I2C bus and interfaces with the LED sub-system.

 

Linux Mainline Status

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

Supported Devices:

  • lp3944

 

Linux Source Files

The (...)

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WQFN (RTW) 24 查看选项

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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