KTD2688A中文资料芯凯电子数据手册PDF规格书

特性 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.