2-Ch Step-Up LED Driver with Integrated Power Diode

  • Wide input range: 2.7V to 5.5V
  • Highly integrated solution with high efficiency
    • Integrated 30V power diode
    • Integrated 30V power MOSFET
  • Integrated 2-channel current sinks, up to 8-LEDs per string
    • High accuracy up to 30mA/ch
    • 0.6% current matching at 20mA
    • 1.5% current accuracy at 20mA
  • Dual dimming control scheme
    • I2C interface control with 256 steps
    • Wide range PWM Dimming for CABC
    • 100Hz to 100kHz Frequency
    • 0.1%~100% Duty Cycle at 10kHz
  • Input PWM glitch filter
  • I2C interface for various control
  • Programmable current sink ramp up/down time and shape (Exponential/Linear)
  • Selectable 1MHz and 500kHz switching frequency with frequency shift option
  • Programmable OVP (30V/24V), current limit (1A/0.7A) and LX pin slew rate
  • LED open/short protection
  • Pb-free Packages: TQFN33-16, WLCSP-12
  • -40°C to +85°C Temperature Range

Applications

  • Smartphone/Tablet Backlight
  • PDA/GPS Backlight

Key Electrical Specifications

Vin(Min) Vin(Max) Maximum # of LED  Channel  Channels Control Type Package
2.7V 5.5V 8 2 I2C, PWM TQFN33-16, WLCSP-12

Typical Application Diagram