LED Drivers
  • SC653
    • Charge Pump LED Driver for 4BL + 2LDO + SemPulse Interface
  • SC657
    • Charge Pump LED Driver for 5BL + SemPulse Interface
  • SC658
    • Charge Pump LED Driver for 4BL + SemPulse Interface
  • SC656
    • Charge Pump LED Driver for 7BL + Dual PWM Interfaces
  • SC446
    • High Efficiency Integrated Driver for 3-Strings of 100mA LEDs
  • SC441C
    • High Efficiency Integrated Driver for 4-Strings of 150mA LEDs
  • SX1239
    • Low Power Integrated UHF Receiver
  • SC4538
    • High Efficiency Boost Converter for up to 10 LEDs
  • SC4539
    • High Efficiency Boost Converter for up to 6 LEDS
  • SC561
    • Dual Output Low Noise LDO Linear Regulator
  • SC810
    • Single Input/Single Mode Single-cell Li-ion Battery Charger
  • SCDAS4F
    • Standard Recovery, High Current Center Tap and Doubler Rectifier Assemblies
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.

Features


  • 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

Applications


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

Packaging

MLPQ-UT-20

Order Codes

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