PWM Controllers
  • SC418
    • DC-DC Buck PWM Controller with Programmable LDO
  • SC419
    • Single Phase DC-DC Converter with Integrated Boost Diode
  • SC454
    • Single-Phase Single Chip IMVP-6/6+ Vcore Power Supply
  • SC493
    • Step-down Controller with I2C Interface
  • 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 SC4509

Semtech SC4509

Highly Integrated Boost Converter for White LED Applications in MLPD-W8-2x2

The SC4509 is a highly integrated step-up DC/DC converter targeted for white LED backlighting applications. It is designed to drive up to five LEDs with a wide input voltage range of 2.7 to 10 volts. Designed for an output voltage up to 20V, the SC4509 operates with a constant 1.2MHz PWM frequency.

Features


  • VIN range: 2.7V — 10V
  • Integrated Schottky diode
  • 81% efficiency
  • Requires only 4 external components
  • Up to 20V of output voltage
  • 30mA maximum LED current
  • Open LED protection (OVP)
  • 1.2MHz PWM switching frequency
  • Low feedback voltage (20OmV typical)
  • Wide range of PWM dimming
  • Drives up to 5 LEDs
  • 500mA switch current limit
  • 220nF output capacitor
  • Available in 2mm x 2mm x 0.75mm MLPD-W8 and SOT23-6 packages
  • Packages are fully WEEE and RoHS compliant

Applications


  • Digital Video Cameras
  • White LED Backlight Driver
  • OLED Display Driver
  • Portable Media Players
  • GPS Receivers
  • Cellular Phones
  • PDAs and Handheld Computers

Packaging

SOT-23-6, MLPD-W8

Order Codes

  • SC4509SKTRT: Lead-Free, RoHS and WEEE Compliant, 3000 pcs.Tape & Reel
  • SC4509WLTRT: Lead-Free, RoHS and WEEE Compliant, 3000 pcs.Tape & Reel