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/LED2: Up to 1.5A
 Flash/Torch/IR modes
 Independent LED on/off and current settings
 Programmable ramp shape and time control
 Three input low voltage protection modes
 Torch currents up to 187.5mA (KTD2688) or
375mA (KTD2688A)
 Flash time-out protection up to
1.60s(KTD2688A)
 LED cathode ground connection for improved
thermal dissipation
• LED open/short protection
• I2C fault read back
• RoHS and Green Compliant

Applications

• Smartphones and Tablets Camera Flash
• Digital Cameras

Brief Description

KTD2688 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.
Various protection features are integrated into KTD2688,
including cycle-by-cycle input current limit protection,
output overvoltage protection, LED fault (open or short)
protection, flash timeout protection and thermal shutdown
protection.
KTD2688 is available in a RoHS and Green compliant
12-ball 1.30mm x 1.57mm WLCSP package with
0.4mm pitch.