Diodes – AL3066 – Four-channel LED Driver with Boost Controller for Medium-sized LCD Panels

The AL3066 is a high efficiency 4-channel boost controller for WLED backlight applications. It operates over a wide input voltage ranged from 4.5V to 33V.

The current of the 4 channels is simply programmed from 20mA to 400mA with an external resistor. The current match between any channel is ±1.5% (typical). Its operating frequency can be adjusted from 0.1MHz to 1MHz.

The AL3066 can support two dimming modes: direct PWM dimming, PWM to analog dimming.

Robust protection features include cycle by cycle current limit, soft-start, UVLO, programmable OVP, OTP, open/short LED protection, Schottky Diode Short and Open Protection, Inductor Short-Circuit Protection and VOUT Short protection.

The IC is available in SO-16 package.

 

Advantages

  • Regulates 4 LED strings at up to 250mA per string. Simple solution for medium sized LCD panels for TVs
  • Supports both PWM and PWM to DC dimming. Uses multiple dimming modes to achieve wide dynamicbrightness control
  • 10V Gate Driver for Boost Controller. Supports simple enhancement of popular MOSFETs
  • High LED current precision (±3%) and channel matching(±1.5%). Guarantee the consistency of panel brightness both betweenchannels and between ICs
  • Extensive Protection functions:(current limit, soft-start, programmable OVP, OTP, open/short LED protection, Schottky Diode Short and Open Protection, Inductor Short-Circuit Protection and VOUT Short protection. Increases system robustness

 

Applications

  • LCD Monitor
  • LCD Display Module
  • LCD TV

 

Link to the datasheet

See also

© 2018 Rutronik GmbH, Germany

Log in with your credentials

or    

Forgot your details?

Create Account