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.