Control circuit and method for controlling the voltage of exit and / or flow out to a power source switching controlled by the primary side.The present invention relates to a circuit for the control of current and voltage in a power source switching controlled from the primary side, comprising a transformer with a primary winding of the primary side and secondary side, in which the pulses of energy " The transmitted from the primary side to the secondary side.In addition, a key to the primary side switches on and off a primary current through the primary winding of the primary side. A primary current comparator determines the time of shutdown key, depending on the primary current.To reduce the dependence of the load output voltage, the control variable is amplified in the variable by a network of return, and additionally the control variable is reduced depending on the output load through a network of correction.To reduce the noise generated by transmission of pulse high energy at low frequencies and the ripple of output voltage, the control variable is returned to the primary current comparator, in a manner such that the duration by which the primary current flows through the enrol The main budget of primary side is reduced in a different way.In order to reduce the susceptibility of the hoist to determine the time of connection, a voltage comparator, which depends on the control variable is generated as a reference.
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