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
  • 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
  • SC446
    • High Efficiency Integrated Driver for 3-Strings of 100mA LEDs
Semtech SC657

Semtech SC657

Charge Pump LED Driver for 5BL + SemPulse Interface

The SC657 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 — 0mA to 25mA
  • Up to three LED grouping options
  • Fade-in/fade-out feature for main LED bank
  • Charge pump frequency — 250kHz
  • SemPulse single wire interface
  • Backlight current accuracy — ±1.5% typical
  • Backlight current matching — ±0.5% typical
  • LED float detection
  • Automatic sleep mode (LEDs off) — IQ = 60μA (typ.)
  • Shutdown current — 0.1μA (typical)
  • Ultra-thin package — 2 x 2 x 0.6 (mm)
  • Fully WEEE and RoHS compliant

Applications


  • Cellular phones, smart phones, and PDAs
  • LCD modules
  • Portable media players
  • Digital cameras
  • Personal navigation devices
  • Display/keypad backlighting and LED indicators

Packaging

MLPQ-UT-20 (3 X 3 mm)

Order Codes

  • SC657ULTRT: Lead-Free, WEEE and RoHS Compliant, 3000pcs Tape and Reel Only