LP3944 - RGB/白光/蓝光 8 LED 趣味闪烁光驱动器

LP3944是TI德州仪器公司的一款背光产品，LP3944是RGB/白光/蓝光 8 LED 趣味闪烁光驱动器，本站介绍了LP3944的封装应用图解、特点和优点、功能等，并给出了与LP3944相关的TI元器件型号供参考。

LP3944 - RGB/白光/蓝光 8 LED 趣味闪烁光驱动器 - 背光 - LED驱动器 - 德州仪器

产品描述

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.

产品特性

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

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