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LP3943 - RGB/White/Blue 16-LED Fun Light Driver

Description

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.

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 16 LED driver (multiple programmable states.
  • on, off, input, and dimming at a specified rate) n 16 Open drain outputs capable of driving up to 25 mA per LED.

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Datasheet preview – LP3943

Datasheet Details

Part number LP3943
Manufacturer National Semiconductor
File Size 264.23 KB
Description RGB/White/Blue 16-LED Fun Light Driver
Datasheet download datasheet LP3943 Datasheet
Additional preview pages of the LP3943 datasheet.

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Full PDF Text Transcription

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LP3943 RGB/White/Blue 16-LED Fun Light Driver November 2003 LP3943 RGB/White/Blue 16-LED Fun Light Driver General Description 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, 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. LP3943 instead requires only the setup of the frequency and duty cycle for each output pin.
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