3-Channel RGB LED Driver with ExpressWire Control

  • Ultra low dropout regulated current sinks
    • 3-Channels: KTD2021
  • 40mV typical at 10mA per channel
  • Programmable LED setting with
    • ExpressWireTM
  • Individual channel control
    • On/Off Interval Time Control
    • Dimming Up/Down Time
    • Current Level Setting
    • RGB or RGBW LED Color Control
  • 192 current levels: 24mA max, 0.125mA step
  • ±5% current matching for max current
  • Low supply current of 200μA typ.
  • No noise, non-pulsating LED current
  • Fast, smooth start-up
  • VIN Range: 2.7V to 5.5V
  • 0.1μA Shutdown Current
  • Pb-free Package: UTDFN-8 1.5×1.5mm and TSOT23-6
  • -40°C to +85°C Temperature Range


  • RGB indicator LEDs
  • Flashing LEDs
  • Mobile Phones
  • Handheld Devices
  • Digital Cameras

Key Electrical Specifications

Vin(Min) Vin(Max) Number of LEDs/Channel LED Channels Brightness Control Max. Current

per Channel

Accuracy Dropout Package
2.7V 5.5V 1 3 ExpressWire 24mA ±5% 40mV TSOT23-6

Typical Application Diagram