LED Drivers
  • SC668
    • 8 LED Light Management Unit Automatic Dropout Prevention , Ambient Light Sense Input, PWM Dimming, and 4 LDOs
  • SC667
    • 7 LED Light Management Unit Automatic Dropout Prevention, Ambient Light Sense Input, PWM Dimming, and 4 LDOs
  • SC662
    • Backlight Driver for 6 LEDs with SemPulse® Interface
  • SC657
    • Charge Pump LED Driver for 5BL + SemPulse Interface
  • SC653
    • Charge Pump LED Driver for 4BL + 2LDO + SemPulse Interface
  • SC5010H
    • High Efficiency 8-Channel LED Driver with I2C Interface and Phase-Shifted PWM Dimming
  • SC5010
    • High Efficiency 8-Channel LED Driver with I2C Interface and Phase-Shifted PWM Dimming
  • SC4541
    • High Frequency LED Driver with Integrated Schottky and Simple Interconnect
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