0.9V Boost Driver for White LEDs

By: YEG Opto  23/09/2009
Keywords: LED, optoelectronics, LED Drivers

This tiny circuit drives white, blue or UV LEDs from a single battery cell with a constant output current and is simple and easy to use.

  • Boost driver with stabilised LED current over
  • Wide input voltage range
  • Minimum input voltage 0.9V - allows use of single alkaline or NiMH cells with all LED types
  • PR4401, PR4402 for up to 1.9V,
  • PR4406 up to 5V supply
  • SOT-23 package, lowest total cost
  • Requires only a small inductor as external
  • Component at low LED currents
  • Simple circuit for high LED currents
  • High efficiency of 80% and more
  • Battery deep discharge protection
  • Compatible with all LED types
  • LED current set by inductance
  • Miniture pocket torches
  • Indicator lights for low-voltage circuits
  • LCD backlighting for watches and clocks
  • toys, models making
  • Medical lights

Keywords: LED, Led Distributor, Led Driver, LED Drivers, optoelectronics, white LED