A power equalization circuit in a transformer-based device having a
plurality of isolated voltage outputs is provided. The circuit comprises:
a threshold detection circuit configured to receive an error signal
derived from a selected voltage at one of the isolated voltage outputs,
and to determine whether the selected voltage is above a voltage
threshold based on the error signal; a timer circuit configured to
activate a wait signal after a maximum voltage drift time has expired
since the selected voltage rose above the voltage threshold, and to
activate a wink signal coincident with the wait signal; an overdrive
current source configured to drive an error current to an overdriven
value in response to the wait signal; and a commutator circuit connected
to a transistor winding associated with the selected isolated voltage
output, the commutator being configured to connect a transformer
secondary winding to ground in response to the wink signal.