Forward converter with an inductor coupled to a transformer winding

A forward converter, comprising: a transformer having a first winding and a second winding; a source of an input supply voltage; a switching transistor responsive to a periodic switching control signal for periodically applying said input supply voltage to said first winding; a rectifier coupled to said second winding for rectifying a transformer-coupled voltage in said second winding to generate a rectified output supply voltage coupled to a load, said output supply voltage being generated during a portion of a given period when said input supply voltage is applied to said first winding, to provide forward converter operation; an inductor coupled to said second winding via said first winding for limiting a rate of change of a current flowing in said rectifier; a capacitance coupled to said inductor to form a resonant circuit; and a control circuit responsive to a resonant voltage developed in Said resonant circuit for generating said switching control signal having switching timings that control said output supply voltage to provide zero voltage switching in said switching transistor.

A forward converter, comprising: a transformer having a first winding a second winding and a third winding; a source of an input supply voltage; a switching transistor responsive to a periodic switching control signal for periodically applying said input supply voltage to said first winding; a first rectifier coupled to said second winding for rectifying a transformer-coupled voltage developed in said second winding, said transformer-coupled voltage being coupled via said first rectifier to a first load to develop a rectified first output supply voltage in said first load, during a portion of a given period when said input supply voltage is applied to said first winding in a forward converter operation such that a first current path between said second winding and said load and including said first rectifier, has a low impedance; a second rectifier coupled to said third winding for rectifying a transformer-voltage developed in said third winding to develop a rectified, second output voltage coupled to a second load, such that a second current path between said third winding and said second load and including said second rectifier has a low impedance during said period portion; an inductor coupled to said first winding for limiting in common a rate of change of a current flowing in each of said first and second current paths; and a control circuit for generating said switching control signal, having switching timings that control said output supply voltage.