特性 Features

? High efficiency synchronous boost converter

with 2MHz/4MHz switching frequency option

? I2C interface programming and hardware

STROBE/TORCH control

? Two current sources and one current sink

? LED1: Up to 1.5A (7 bits)

? LED2: Up to 1.0A (6 bits)

? LED3: Up to 0.5A (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 (LED1/LED2)

? LED open/short protection

? I2C fault read back (I2C address = 0x63)

Applications

? Smartphones and Tablets Camera Flash

? Digital Cameras

Brief Description

KTD2686 is the ideal power solution for high-power flash

LEDs. It includes a highly integrated synchronous boost

converter, two current sources and one current sink,

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 and one current sink 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 KTD2686,

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.

KTD2686 is available in a RoHS and Green 12-ball

1.42mm x 1.66mm WLCSP package with 0.4mm pitch.