9-Channel IR LED Driver with Buck Regulator and I2C Interface

Description

The KTD2041 is an ideal power solution for IR LED driver with an integrated buck regulator. It has 9 high- precision current sinks that can be independently controlled via I2C interface.

The buck regulator has an input voltage operating range from 2.7V to 5.5V to accommodate 1-cell lithium- ion batteries or 5V voltage rail. It has adaptive output voltage control based on the headroom voltages of the LED current sinks to minimize the power consumption. It has integrated high-side and low-side power FET. The buck regulator features advanced adaptive On- Time control with 1MHz switching frequency, which minimizes external component counts and allows the use of a very small inductor and capacitor.

The KTD2041 has 9 built-in current sinks, which features independent On/Off control and 6-bit independent current dimming via I2C interface. The KTD2041 has extensive built-in protection features including cycle-by-cycle current limit, input undervoltage Lockout (UVLO), output over-voltage protection, LED fault (open or short) protection and thermal shutdown protection.

The KTD2041 is available in a RoHS and Green compliant 3mm x 3mm UQFN package.

Features

  • Overvoltage Protection
  • Nine High-Precision Current Sinks
    • LED Current Up to 32mA per Channel
    • ±1% Typical Current Matching
    • ±2% Typical Current Accuracy at 32mA
    • 6-bit Current Dimming Control with I2C
    • Independent On/Off Control
    • Supports both Independent and Global Dimming
  • High Efficiency Buck Regulator
    • Integrated 200mΩ / 100mΩ High / Low-Side FET
    • Adaptive On-Time Control with default 1MHz Switching Frequency, with factory programmable 1.5MHz, 2MHz, and 2.5MHz options
    • Adaptive VOUT Control Based on the Headroom Voltages of the LED Current Sinks
    • Selectable Auto-Skip Mode or Forced-PWM mode at Light Loads
  • 140μA Typical No-Load Supply Current
  • Open-Drain FAULT Signal Output and Fault Reset
  • Extensive Fault Diagnostics
  • -40°C to 85°C Operating Temperature Range
  • Small UQFN-20 (3mm x 3mm) Package

Applications

  • IR LED Drivers
  • Video Doorbells
  • Security Camera
  • IRIS Recognition Cameras

Packaging Information

Package Dimensions Package Code
UQFN33-20 3mm x 3mm x 055mm UAC

Technical Documentation

Description Documents Type
DatasheetKTD2041-04cPDF
Package Outline DrawingUQFN33-20 UAC PODPDF

Purchase

Purchase Options
Buy from Digi-Key
Buy from Mouser