Output Stabilizer


Posted on Jun 21, 2012

Optically isolated SMPS and dc-to-dc converters face the variance of output voltage owing to the change of transmission c


Output Stabilizer
Click here to download the full size of the above Circuit.

haracteristics of an optoisolator with (a) temperature and (b) aging. The photo diode emission decays with temperature and time, and causes the output voltage to change. The problem is solved using a homoeopathic principle. An additional optical isolator is used to derive the + Vt input voltage, instead of a conventional potential divider from internally stabilized reference. Thanks to - Ve temperature coefficient of VD any changes in K1 and K2 as a result of temperature and aging, track each other to maintain the output voltage constant. With proper selection of R2 and i4, the output voltages are found to vary by less than 0.01%/°C over a wide temperature range.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    1,5-15V 500mA Power Supply
    Variable-duty-cycle-timer
    Crossover For Subwoofer
    water sensor circuit using 555 timer
    The MiniBlok SET Amp
    Simple combination lock
    16x2 LCD Display Custom Characters Circuit
    Super Fool power amplifier module



    Top