KTD2690 is the ideal power solution for high-power flash LEDs. The highly integrated synchronous boost converter and current source can support up to 1.5A flash and up to 376mA torch current. The device provides a very small total solution in a portable application. It has both I2C interface and hardware STROBE pin for maximum control flexibility. The integrated current source on/off and current settings in Flash/Torch/IR modes can be programmed by the I2C interface. A selectable input low voltage protection function can prevent a system reset under low battery conditions.

Various protection features are integrated into KTD2690, including cycle-by-cycle input current limit protection, output overvoltage protection, LED fault (open or short) protection, flash timeout protection, and thermal shutdown protection.

KTD2690 is available in a RoHS and Green 8-ball 1.519mm x 0.808mm x 0.500mm WLCSP package with 0.35mm pitch. Please contact a Sales Representative for the 10-lead 2mm x 2mm x 0.55mm UDFN package option.


  • High efficiency synchronous boost converter with 2MHz/4MHz switching frequency option
  • I2C interface programming and hardware STROBE control
  • Single-channel programmable current source
    • Flash/Torch/IR modes
      • Flash: Up to 1.5A (128 Levels)
      • Torch: Up to 375mA (128 Levels)
    • Input low voltage protection function
    • Flash time-out protection
    • LED cathode ground connection for improved thermal dissipation
  • LED open/short protection
  • I2C fault read back
  • RoHS and Green compliant
  • Pb-free Packages: WLCSP-8 or UDFN22-10L (please contact Sales Representative for UDFN option)
  • -40°C to 85°C Operating Temperature Range


  • Smartphones and Tablets
  • IR LED Driver
  • Digital Cameras

Packaging Information

Package Dimensions Bumps Package Code
UDFN22-10* 2.00mm x 2.00mm x 0.55mm 10 VAB
WLCSP24-8 0.808mm x 1.519mm x 0.500mm 8 RAA

*please contact sales representative for UDFN option


Vin (min)  Vin (max)  LED Channels Max Current (A)
2.7V 5.5V 3 Flash: 1.5A
Torch: 375mA

Technical Documentation

Description Documents Type
Package Outline DrawingWLCSP24-8 RAA PODPDF

Evaluation Tools

Documents Type
User ManualPDF
Quick Start GuidePDF
Bill of MaterialsXLSX
3D BoardPDF


Part Number Marking Operating Temperature Package
KTD2690EVAB-TA* RGYWZ -40°C to +85°C UDFN22-10

*please contact sales representative for UDFN option

Purchase Options
Buy from Digi-Key
Buy from Mouser