Patent ID: 11881787
Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A power converter, comprising:
a primary circuit configured to apply a voltage of alternating polarity to a primary winding of a transformer;
a secondary circuit configured to rectify an alternating voltage generated on a secondary winding of the transformer;
a clamp circuit including a clamp capacitor, wherein the clamp circuit is coupled to a phase node included in the secondary circuit, wherein the phase node is coupled to the secondary winding via a first electrically-controlled switch, and wherein the clamp circuit is configured to:
couple the phase node to the clamp capacitor in response to an activation of a clamp signal; and
extract a current from the phase node through a diode and apply the current to the clamp capacitor in response to a determination that a voltage on the phase node exceeds an excursion voltage; and

a controller configured to:
store a first predetermined duration;
activate a push phase for the primary circuit; and
assert the clamp signal in response to a determination that the first predetermined duration has elapsed since an activation of the push phase.