6-Ch Step-Up LED Driver with PWM-Control Mixed-Mode Dimming

  • Input voltage range: 2.7V to 5.5V
  • Drive up to 60 LEDs (10S6P)
  • High efficiency LED driver, up to 90%
  • High frequency step-up converter (940kHz)
  • Integrated 40V power MOSFET
  • Integrated 6-channel current sinks
    • Up to 30mA/ch
    • 0.5% Typ. current matching
    • 2.0% Typ current accuracy at 20mA
  • Wide input PWM dimming frequency range
    • 100Hz to 30KHz
  • Programmable Mixed-Mode Dimming controls
    • Mixed analog dimming and PWM dimming
    • Selectable transition point : 25% or 12.5% input PWM duty cycle
    • Selectable output PWM dimming frequency : fixed 22kHz or following input PWM dimming frequency
    • Channel current phase shift in fixed 22kHz output PWM dimming mode
  • Input PWM glitch filter
  • LED open/short protection
  • Adjustable over-voltage protection
  • Cycle-by-cycle inductor current limit (2.5A)
  • 0.1 µA shutdown current
  • Pb-free TQFN33-16 and WLCSP-16 Package
  • -40°C to +85°C Temperature Range

Applications

  • Tablet Backlight
  • Netbook/Notebook Backlight
  • Portable media players

Key Electrical Specifications

Vin(Min) Vin(Max) Maximum # of LED  Channel  Channels Control Type Package
2.7V 5.5V 10 6 Dimming via PWM control TSOT23-6, WLCSP-16

Typical Application Diagram

KTD3156