Improvement the battery life

Discussion in 'The Projects Forum' started by Mahmoudtak, Mar 6, 2014.

  1. Mahmoudtak

    Thread Starter New Member

    Feb 28, 2014
    4
    0
    Hi
    I'm trying to design a LED driver ( a battery ) using a adaptor how can I improve its life time?
     
  2. AfdhalAtiffTan

    Active Member

    Nov 20, 2010
    117
    11
    Depending on the LED itself.
    Most high-powered ones would benefits by using SMPS.
     
  3. Papabravo

    Expert

    Feb 24, 2006
    10,144
    1,790
    Make the LED so dim you can hardly see it for continuous current draw or use pulse width modulation with a variable duty cycle.
     
  4. Mahmoudtak

    Thread Starter New Member

    Feb 28, 2014
    4
    0
    Sorry! I mean the life time of the battery. Somebody has said " you need to match driver frequency with the LED frequency to improve the battery's life time?" Is he right?
    How is it possible?
     
  5. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    7,388
    1,605
    Nope, that's gobbledegook. Hokum. Bull hockey.

    A switcher is the best choice: make a current controlled output and the LED will regulate it's own voltage.

    Of course, the current level is set to where you are driving the LED.
     
  6. crutschow

    Expert

    Mar 14, 2008
    13,013
    3,233
    As has been said, use a constant-current output SMPS and run the LED as dim as possible. Both will maximize battery life. PWM without an inductor in the circuit will not significantly lengthen the life of your battery.
     
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