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  4. Diodes Incorporated — AL5887 36-Channel Linear LED Driver

Diodes Incorporated — AL5887 36-Channel Linear LED Driver

 

 

Diodes Incorporated

 

Diodes Incorporated AL5887 36-Channel Linear LED Driver

With I2C/SPI and diagnostics to simplify RGB LED lighting

The Diodes Incorporated AL5887 is a 36-channel, linear current LED driver using SPI or I2C for a wide and dynamic range of programmable LED currents.

Each channel has an internal 12-bit PWM for color and brightness control, making it ideal for up to 12 RGB LED modules or 36 single-color LED lighting applications.

The device has built-in programmable registers, with three programmable banks (A, B, C) for software control of each color. This enables users to easily customize the device to accommodate the following functions:

  • Independent color-mixing register per channel
  • Independent brightness control register per RGB module
  • 3-bit dithering function to enhance the PWM resolution
  • Pre-UVLO (undervoltage lockout) and pre-OTP (overtemperature protection) warning to pull fault-pin low for early system protection

The AL5887 automatically enters its power saving mode of 15μA (max) when all LEDs are off for >30ms. The device is available in the wettable W-QFN6060-52/SWP package.

The SPI/I2C AL5887 provides precise adjustment of brightness and color in commercial and industrial applications.

Features

  • 6-Bit Global LED Output Current
    • Features programmable registers through I2C/SPI interface
  • Diagnostic and Protection Functions
    • Includes open-drain fault-indication pin for individual LED channel open/short detection, UVLO, and overtemperature conditions
  • Internal 16MHz Oscillator for PWM Dimming
    • Eliminates the need for an external PWM clock
  • Dimming Using Both PWM (3%) and Analog (<3%)
    • Supports brightness control better than 1%
  • Device-to-Device and Channel-to-Channel Current Accuracy Better Than 5%
    • Provides precise color mixing and uniform color distribution across lamps and displays

Applications

  • Electric vehicle charging stations
  • Smart Home Appliances
  • Infotainment displays
  • IoT information indicators
  • RGB LED lighting
  • Architectural lighting
  • Industrial LED lighting
  • Computing hardware