CAT3648: LED Driver, 4-Channel with 32 Dimming Levels

Description: The CAT3648 is a high efficiency fractional charge...
  • The CAT3648 is a high efficiency fractional charge pump that can drive up to four LEDs programmable by a one wire digital interface. The inclusion of a 1.33x fractional charge pump mode increases device efficiency by up to 10% over traditional 1.5x charge pumps with no added external capacitors.

    Low noise input ripple is achieved by operating at a constant switching frequency which allows the use of small external ceramic capacitors. The multi-fractional charge pump supports a wide range of input voltages from 2.4 V to 5.5 V.

    The EN/DIM logic input functions as a chip enable and a digital dimming interface for setting the current in all the LED channels. The 1-wire pulse-dimming interface supports 32 linear steps from full-scale down to zero current.
  • Features
  • High efficiency 1.33x charge pump
  • Quad-mode charge pump: 1x, 1.33x, 1.5x, 2x
  • Drives up to 4 LEDs at 25 mA each
  • 1-wire EZDim™ 32 linear steps
  • Power efficiency up to 92%
  • Low noise input ripple in all modes
  • 'Zero' current shutdown mode
  • Soft start and current limiting
  • Short circuit protection
  • Thermal shutdown protection
  • Applications
  • LCD Display Backlight
  • End Products
  • Mobile Phones
  • Digital Still Camera
  • Technical Documentation & Design Resources
    Product Change Notification
    Availability and Samples
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: LED Driver, 4-Channel with 32 Dimming Levels
  • Package Type: TQFN-16
  • Package Case Outline: 510AD
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 2000
  • Inventory

  • Market Leadtime (weeks):2 to 4
  • Arrow:0
  • Digikey:>1K
  • ON Semiconductor:28,000
  • PandS:<1K
  • Packages
  • Topology: Charge Pump 
  • VIN Min (V): 2.5 
  • VIN Max (V): 5.5 
  • VO Max (V):
  • IO Max (mA): 100 
  • fSW Typ (kHz): 1000 
  • Package Type: TQFN-16 
  • ON Semiconductor Full Web Site