A secondary controller configured for use in a power converter, the secondary controller comprising: a detector circuit configured to generate a crossing threshold signal in response to a forward voltage signal crossing below a threshold; a comparator coupled to generate a first state of an off signal in response to the forward voltage signal being greater than a turn off threshold, the comparator further coupled to generate a second state of the off signal in response to the forward voltage signal being less than the turn off threshold; a first flip flop coupled to turn on a synchronous rectifier in response to the crossing threshold signal and to turn off the synchronous rectifier in response to the second state of the off signal; a mode detection circuit configured to output a first mode signal in response to a feedback signal being below a reference and a first state of a secondary drive signal, the mode detection circuit further configured to output a second mode signal in response to the feedback signal being below the reference and a second state of the secondary drive signal; anda control circuit configured to generate a first pattern of a request signal in response to the first mode signal, the control circuit further configured to generate a second pattern of the request signal in response to the second mode signal.