Current sense detection for synchronous rectification

A method of generating a voltage signal, comprising:

• providing a power conversion circuit including a transistor;
• starting a minimum off-time timer for the transistor;
• measuring a voltage potential at a first terminal of the transistor;
• and
• turning on the transistor after a rate of change over time of the voltage potential exceeds a first threshold.

A power conversion circuit, comprising:

• a synchronous rectification (SR) MOSFET including a conduction terminal;
• a first comparator including a first input coupled to the conduction terminal and a second input of the first comparator coupled to a first reference voltage potential;
• a second comparator including a first input coupled to the conduction terminal and a second input of the second comparator coupled to a second reference voltage potential;
• and
• a timer coupled to an output of the first comparator and an output of the second comparator.