36-Channel RGB LED Driver with I2C Control

Features

  • Drives up to 36 LEDs (12 RGBs)
  • Three Charlieplexed 4-wire Bus to the LEDs
    • Reduces Pin-Count and PCB Traces
  • LED Current: 125µA to 24mA in 125µA Steps
  • Night-Mode: 8µA to 1.5mA in 8µA Steps
  • 5% Current Accuracy & Matching
  • Independent Up/Down Fading per LED
    • 3-bit Programmable Fade Rate
  • Patented BrightExtend™ Technology
    • Automatically Reduces Current-Sink Dropout
  • Proprietary CoolExtend™ Technology
    • 2-bit Programmable Maximum Die-Temp
  • 1MHz I2C Serial Interface
  • 2.5V to 5.5V Operating Supply Voltage Range
  • -40°C to 85°C Operating Temperature Range
  • 20 pin UQFN 3x3mm (0.4mm pitch)

Key Electrical Specifications

Vin(Min) Vin(Max) Vout (Min)  Vout (Max) Supply Current Standby Current Shutdown Current LED Channels Current per Channel Operating Temperature Interface Package
2.5V 5.5V 2.5V 5.5V 1.6mA Typ. 0.3µA Typ. 0.3µA Typ. 36 24mA -40 to 85°C 1MHz I2C UQFN33-20

Applications

  • Artificial Intelligence (AI) Loudspeakers
  • Bluetooth / WiFi Loudspeakers
  • Automotive Mood-Lighting
  • IoT, Gaming Keyboards, Toys

Typical Application Diagram