Woo-hoo, a simple low-voltage synchronous rectifier circuit
February 2, 2007
Which I found among the 5 reported pages for googling “buckpuck synchronous”.
Why is this important? At low (bicycle generator, solar cell) voltages, a normal diode drop (0.7V) is a big hunk of the total voltage available. Step one in understanding the circuit is to understand that the MOSFET is run “backwards”, and its body diode is used as a “real diode” to kickstart the circuit.
I still need to check that this will work right when translated into its P-channel equivalent.