High Efficiency Step-Up 3-Ch LED Driver, 42V OVP

  • KTD3118: 2 strings, 20 LEDs total
  • KTD3119: 3 strings, 30 LEDs total
  • High efficiency: up to 90%
  • High frequency step-up converter (800kHz)
  • Wide input range: 2.7V to 5.5V
  • Integrated 45V Power MOSFET
  • Internal compensation and soft start
  • Integrated 2- or 3-channel current sink
  • Preset 25mA full-scale current per channel
  • 1.5% Typ. current matching
  • PWM dimming with < 0.3µs rise/fall time
  • Low quiescent current
  • LED open/short protection
  • 42V LED open-circuit (OVP) threshold
  • Cycle-by-cycle inductor current limit
  • < 1µA shutdown current
  • Pb-free Package: WLCSP-9 1.2mm x 1.2mm
  • -40°C to +85°C Temperature Range

Applications

  • Smartphone
  • PDA
  • GPS
  • Portable media players
  • Other 1-cell Li Ion LED applications

Key Electrical Specifications

Vin(Min) Vin(Max) Max. Current per Channel Channels Control Type Package
2.7V 5.5V 25mA 3 PWM  WLCSP-9

Typical Application Diagram