LED Backlight Drivers Support Camera Flash Apps

Addressing the demand for advanced LCD Panel lighting solutions that deliver increased capabilities in a small package, Kinetic Technologies offers the KTD3133, KTD3134, KTD3136 and KTD3137 two- and three-channel solutions in its LED backlight driver IC portfolio.

 

All four provide LED backlighting for LCD displays up to seven inches. KTD3137 and KTD3134 include a high current mode that drives the panel LEDs brighter during front side camera, still and video capture. Both backlight and flash modes operate using a single inductor, which drastically reduces the PCB area and eliminates components. These step-up dc/dcc converters operate with an input voltage from 2.7V to 5.5V and accommodate 1-cell lithium ion batteries or 5V supply.

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Each of the current sinks in the KTD3133/4/6/7 can regulate up to 30 mA in backlight mode and are equipped with I2C interfaces for various controls. KTD3134/7 can drive up to 60 mA in panel flash mode. Built-in protection features include: cycle-by-cycle inductor current limit, output overvoltage, LED fault (open or short) and thermal shutdown.

 

Features in a nutshell include:

 

KTD3133/4/6/7

  • Wide input range: 2.7V~5.5V
  • I2C/PWM dual dimming control scheme
  • Programmable current sink turns on/off ramp time and shape
  • Selectable boost converter switching frequency
  • Programmable input PWM hysteresis to minimize jitter at low PWM duty cycle
  • Programmable OVP and current limit
  • Status reporting through I2C interface

KTD3133/4

  • 2-Ch current sinks, up to 8-LEDs per string

KTD3136/7

  • 3-Ch current sinks, up to 8-LEDs per string

 

For greater illumination, visit Kinetic Technologies for datasheets.

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