efficiency of mc34063

Discussion in 'General Electronics Chat' started by bug13, Feb 2, 2013.

  1. bug13

    Thread Starter Well-Known Member

    Feb 13, 2012
    1,208
    38
    Hi

    Recently I am playing with the MC34063, I find that the efficiency of this chip is very low, the best I can get is about 60% at 100KHz.

    Is this normal for this chip? or did I do something wrong here?

    Thanks

    NOTE:

    I am just using the boost converter configuration in the datasheet, boosting 5V to 14V @ 100mA
     
  2. takao21203

    Distinguished Member

    Apr 28, 2012
    3,577
    463
    Change the frequency. You can get a little more than 70% easily with this chip.
     
    bug13 likes this.
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