dc-dc3V升壓21V 10W功率高效升壓白光LED驅動器

小鄭

1.2MHz,High Efficiency Boost White LED Driver
SL6608替代RT9293BGJ6

GENERAL DESCRIPTION
  The SL6608 is a step-up converter designed for
driving up to 7 series white LEDs from a single cell
Lithium Ion battery. The SL6608 uses current
mode, fixed frequency architecture to regulate an
LED current, which is measured through an
external current sense resistor. Its low 200mV
feedback voltage reduces power loss and
improves efficiency.
  The SL6608 includes under-voltage lockout,
current limiting and thermal overload protection
preventing damage in the event of an output
overload.
  Optimized operation frequency can meet the
requirement of small LC filters value and low
operation current with high efficiency. Internal soft
start function can reduce the inrush current. Tiny
package type provide the best solution for PCB
space saving and total BOM cost.

FEATURES
  High Efficiency: Up to 90%
  1.2MHz Constant Frequency Operation
  Integrated internal Power MOSFET
  Drives up to 7 Series WLEDs
  Low 200mV Feedback Voltage
  Soft-start/Dimming with wide Frequency
Range
  UVLO, Thermal Shutdown
  Internal Current limit
  Over Voltage Protection
  Small LC Filter
  Minimize the External Component
  <1μA Shutdown Current
  SOT23-6 Package

APPLICATIONS
  Camera Flash White LED
  Mobile Phone, Smart Phone LED Backlight
  PDA LED Backlight
  Digital Still Cameras
  Camcorder

TYPICAL APPLICATION