Modulating jitter frequency as switching frequency approaches jitter frequency

A power converter, comprising:

• an energy transfer element coupled between an input of the power converter and an output of the power converter;
• a power switch coupled to the energy transfer element, the power switch configured to control a transfer of energy from the input of the power converter to the output of the power converter;
• and
• a power converter controller configured to control the transfer of energy from the input of the power converter to the output of the power converter, the power converter controller comprising:
• a primary controller configured to generate a drive signal to control switching of the power switch in response to a current sense signal representative of a current through the power switch and a jitter signal, wherein the jitter signal is modulated in response to a drive signal detected below a first threshold frequency;
• and
• a secondary controller configured to generate a secondary control to control a synchronous rectifier circuit.