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
  • 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 SC446

Semtech SC446

High Efficiency Integrated Driver for 3-Strings of 100mA LEDs

The SC446 is a high-effciency multiple string WLED driver with an integrated boost converter. It operates over a wide input range from 4.5V to 27V with a maximum output voltage of 36V and a 2.5A internal power switch. It can drive up to thirty WLEDs in 3 strings with current up to 100mA per string.

Features


  • Wide input voltage range from 4.5V to 27V
  • 36V maximum output voltage
  • Drives up to 30 WLEDs in 3 strings
  • Programmable LED current for up to 100mA per
    string
  • +/- 2% string-to-string current matching
  • Up to 90% efficiency
  • Wide 0.2% to 100% PWM dimming range
  • Possible analog dimming
  • Integrated 2.5A power switch
  • 700kHz switching frequency for small size
  • Adjustable OVP for cost-e!ective output cap selection
  • Open/short LED protection
  • Thermal protection with auto-recovery
  • Thermally enhanced TSSOP-16 EDP package
  • Pb Free, Halogen Free, andWEEE/RoHS Compliant

Applications


  • Medium-sized LCD panel
  • Notebook Display
  • Automotive Car Navigation Display
  • Sub-Notebook and Tablet Computer Displays
  • Portable Media Players

Packaging

  • TSSOP-16

Order Codes

  • SC446TETRT