SG3525A

Discussion in 'The Projects Forum' started by Yulik, Dec 7, 2015.

  1. Yulik

    Thread Starter New Member

    Dec 7, 2015
    1
    0
    Hello,
    I am using SG3525A in an analog control circuit for a flyback converter as a PWM. The idea is to give it the error coming from a PI controller in order to get a duty cycle that allows to control the output of the flyback. So far I am using a voltage source to simulate the error in ltspice (I also attach the full circuit with the control if you want).The problem is that no matter the value that is given for that voltage, which would be the error, I always get the same duty cycle of a 50%. Can anyone see the error? Thanks in advanced!!
     
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