boost converter problem

Discussion in 'General Electronics Chat' started by savage67, Dec 25, 2009.

  1. savage67

    Thread Starter Member

    Oct 3, 2006
    27
    0
    Hi dears.
    i will design a 36 to 280 V 700W boost converter. to control it i will use attiny861 8 bit mcu. but i know that regulation will be very hard. 60kHz and 8bit PWM is not capable of controlling this boost converter.because max and min duty cycle rates for max and min loads are in a very narrow region. for example Dmin =0.8 Dmax=0.85.

    Is there any one who has experiences on boost converter.

    I must use a mcu because i will use a mppt algorithm.
    Please help me.
     
  2. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    So, is this a homework problem assigned by a teacher/professor/instructor?
     
  3. S_lannan

    Active Member

    Jun 20, 2007
    247
    2
    Made any switch mode supplies before?

    700 Watts is a lot of power, especially if this is your first attempt at a switch mode supply.

    Microchip (the pic guys) have a few videos on youtube relating to designing switch mode supplies using their DSPic microcontroller. Maybe they'd be useful.

    Your simple boost style converter is not really suited for 700 watts of power. I'd be looking into an isolated push pull converter with proper current mode control.
     
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