LED Drivers
  • SC441D
    • High Efficiency Integrated Driver for 4-Strings of 150mA LEDs
  • SC445
    • High Efficiency Integrated Driver for 4-Strings of 150mA LEDs
  • SC5010
    • High Efficiency 8-Channel LED Driver with I2C Interface and Phase-Shifted PWM Dimming
  • SC5010H
    • High Efficiency 8-Channel LED Driver with I2C Interface and Phase-Shifted PWM Dimming
  • SC5012
    • High Efficiency 4-Ch, 150mA/Ch LED Driver with I2C Interface and Phase-Shifted PWM Dimming
  • SC5012Q
    • High Efficiency 4-Ch, 150mA/Ch LED Driver with I2C Interface and Phase-Shifted PWM Dimming
  • SC5014
    • High Efficiency 4-Channel HB LED Driver with I2C Interface and Phase-Shifted PWM Dimming
  • SC5014A
    • High Efficiency 2-Channel HB LED Driver with I2C Interface and Direct PWM Dimming
Semtech SC4539

Semtech SC4539

High Efficiency Boost Converter for up to 6 LEDS

The SC4539 is designed to regulate current for a series chain of white LEDs in LCD backlighting applications where small size and high efficiency are priorities.

Features


  • Input voltage range — 2.8V to 5.5V
  • Current-mode PWM control — 800kHz
  • Programmable LED current up to 30mA
  • Soft-start to reduce in-rush current
  • PWM dimming — 100Hz to 50kHz
  • PWM dimming at ISET — Analog and fi ltered
  • Over-voltage protection — 25V (max.)
  • Under-voltage lockout (UVLO)
  • Thermal shutdown
  • Shutdown current — <1μA
  • Ultra-thin package — 2mm x 2mm x 0.6mm
  • Lead-free package, WEEE and RoHS compliant

Applications


  • DSLR, DSC, and Video Cameras
  • Cellular handsets
  • Portable media players
  • Personal navigation systems
  • Satellite radio
  • Handheld video games

Packaging

MLPD-8

Order Codes

  • SC4539ULTRT: Lead-free, RoHS and WEEE compliant, 3000 pcs. Tape & Reel
  • SC4539EVB: SC4539 Evaluation Board