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LP3943

ACTIVO

Controlador de 16 canales de LED RGB/Blanco con control de cadena independiente a través de SMBUS/I2

Se encuentra disponible una versión más nueva de este producto

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Detalles del producto

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 mm × 4 mm)
  • Internal power-on reset
  • Active low reset
  • Internal precision oscillator
  • Variable dim rates (from 6.25ms to 1.6s; 160Hz to 0.625Hz)
  • 16 LED drivers (multiple programmable states: ON, OFF, input, and dimming at a specified rate)
  • 16 open-drain outputs capable of driving up to 25mA per LED
  • Internal power-on reset
  • Active low reset
  • Internal precision oscillator
  • Variable dim rates (from 6.25ms to 1.6s; 160Hz to 0.625Hz)
  • 16 LED drivers (multiple programmable states: ON, OFF, input, and dimming at a specified rate)
  • 16 open-drain outputs capable of driving up to 25mA 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 25mA per pin and 200mA per package. Any ports not used for controlling the LEDs can be used for general purpose input/output expansion.

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 25mA per pin and 200mA per package. Any ports not used for controlling the LEDs can be used for general purpose input/output expansion.

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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LP3943 16-Channel RGB, White-LED Driver with Independent SMBUS/I2 C String Control datasheet (Rev. E) PDF | HTML 9/10/2024
Informe Common LED Functions and LED Driver Design Considerations 21/09/2020
Nota sobre la aplicación How to Select a RGB LED Driver 8/08/2019
EVM User's guide AN-1300 LP3943 Evaluation Kit (Rev. B) 30/04/2013
Nota sobre la aplicación AN-1715 LP3943/LP3944 as a GPIO Expander (Rev. A) 30/04/2013

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

LP3943ISQEV — Controlador de 16 LED lúdicos RGB blanco azul

RGB/White/Blue 16-LED Fun Light Driver

Guía del usuario: PDF
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Kit de desarrollo

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El BOOSTXL-CAPKEYPAD es un módulo de evaluación (EVM) fácil de usar para el microcontrolador (MCU) de detección táctil capacitiva MSP430FR2522 con tecnología CapTIvate™. El BOOSTXL-CAPKEYPAD se puede utilizar de tres formas diferentes: con un kit de desarrollo LaunchPad™, con el kit de desarrollo (...)

Guía del usuario: PDF
Productos y hardware compatibles
En inventario
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Controlador o biblioteca

LP3943SW-LINUX — Controlador Linux para LP3943

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 (...)

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Pedidos y calidad

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Soporte y capacitación

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