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LP3944 - RGB/White/Blue 8-LED Fun Light Driver

Datasheet Summary

Description

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.

Features

  • n n n n 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 n 8 LED driver (multiple programmable states.
  • on, off, input, and dimming at a specified rate) n 8 Open drain outputs capable of driving up to 25 mA per LED.

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Datasheet preview – LP3944

Datasheet Details

Part number LP3944
Manufacturer National Semiconductor
File Size 249.63 KB
Description RGB/White/Blue 8-LED Fun Light Driver
Datasheet download datasheet LP3944 Datasheet
Additional preview pages of the LP3944 datasheet.

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Full PDF Text Transcription

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LP3944 RGB/White/Blue 8-LED Fun Light Driver November 2003 LP3944 RGB/White/Blue 8-LED Fun Light Driver General Description 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.
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