• SC445
  • 150mA 4-strings高效集成驱动器LED
  • SC440
  • 30mA LED 6-strings高效的集成驱动器
  • SC440A
  • 30mA LED 6-strings高效集成驱动器
  • SC441A
  • 150mA的LED高效集成驱动器4-strings AEC - Q100标准合格
  • SC441C
  • 150mA的LED -高电压输入4-strings高效集成驱动器
  • SC442
  • 10频道,综合效率高120,白色LED驱动器
  • SC443
  • 30mA LED 3-Strings高效集成的升压驱动器
  • SC446
  • 100mA的LED 3-strings高效集成驱动器
Semtech SC643

Semtech SC643

Charge Pump LED Driver for 5BL + 4LDO + SemPulse Interface


The SC643 is a high efficiency charge pump LED driver using Semtech’s proprietary charge pump technology. Performance is optimized for use in single cell Li-ion battery applications.


  • Input supply voltage range — 2.9V to 5.5V
  • Very high efficiency charge pump driver system with three modes — 1x, 1.5x, and 2x
  • Five programmable current sinks with 29 increments from 0mA to 25mA
  • One programmable 100mA low-noise LDO regulator
  • Three programmable 150mA low-noise LDO regulators
  • Programmable driver configurations for main and sub-display backlight
  • Fade-in/fade-out feature for main and sub display backlight
  • SemPulse single wire interface
  • Backlight current accuracy — ±1.5% typical
  • Backlight current matching — ±0.5% typical
  • External enable pin for optional control of LDO4
  • Automatic sleep mode with LEDs off
  • Shutdown current — 0.1μA typical
  • Ultra-thin package — 3 x 3 x 0.6 (mm)
  • Fully WEEE and RoHS compliant


  • Cellular phones, smart phones, and PDAs
  • LCD display modules
  • Portable media players
  • Digital cameras and GPS units
  • Display backlighting and LED indicators



Order Codes

  • SC643ULTRT: Lead-Free, WEEE and RoHS Compliant, 3000pcs Tape and Reel Only
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