Features

• High efficiency synchronous boost converter
with 2MHz/4MHz switching frequency option
• I2C interface programming and hardware
STROBE/TORCH control
• Two-channel independent current sources
 LED1: Up to 1.5A (7 bits)
 LED2: Up to 1.0A (6 bits)
 Flash/Torch/IR modes
 Independent LED on/off and current settings
 Programmable ramp shape and time control
 Three input low voltage protection modes
 Flash time-out protection up to 1.44s
 LED cathode ground connection for improved
thermal dissipation
• LED open/short protection
• I2C fault read back (I2C address = 0x63)

Applications

• Smartphones and Tablets Camera Flash
• Digital Cameras

Brief Description

KTD2684 is the ideal power solution for high-power flash
LEDs. It includes a highly integrated synchronous boost
converter and two current sources, providing a very small
total solution in portable application. It has both I2C
interface and hardware STROBE/TORCH pins for
maximum control flexibility. The two integrated current
sources are independently controlled, their on/off
conditions and current settings in Flash/Torch/IR modes
can be programmed independently by the I2C interface. It
also has three selectable input low voltage protection
modes to prevent a system reset under low battery
condition. Thermal regulation is also integrated to limit the
IC temperature and continuously provide the maximum
output current.
Various protection features are integrated into KTD2684,
including cycle-by-cycle input current limit protection,
output over-voltage protection, LED fault (open or short)
protection, flash timeout protection and thermal shutdown
protection.
KTD2684 is available in a RoHS and Green 12-ball
1.42mm x 1.66mm WLCSP package with 0.4mm pitch.