Patent ID: 7649280

Claim:
A power equalization circuit in a transformer-based device having a plurality of isolated voltage outputs, comprising: a threshold detection circuit configured to receive an error signal that is derived from a selected voltage at a selected one of the plurality of isolated voltage outputs, and configured 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 was determined to have risen above the voltage threshold, and configured 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 activation of the wait signal; and a commutator circuit connected to a transformer secondary winding associated with the selected one of the plurality of isolated voltage outputs, the commutator being configured to connect the transformer winding to ground in response to the activation of the wink signal.