×

Proactively operational over-voltage protection circuit

  • US 9,735,566 B1
  • Filed: 12/12/2016
  • Issued: 08/15/2017
  • Est. Priority Date: 12/12/2016
  • Status: Active Grant
First Claim
Patent Images

1. An over-voltage protection loop for a transformer, the transformer to include a primary clock and feedback control circuit, a main servo loop circuit, and the over-voltage protection loop, the over-voltage protection loop comprising:

  • an over-voltage winding magnetically coupled to a magnetic core, the over-voltage winding which, in response to a voltage on a primary winding in the primary clock and feedback control circuit, is activated to provide a secondary side voltage supply;

    an error amplifier electrically coupled to a first node and a second node, wherein the error amplifier uses the secondary side voltage supply to maintain a voltage on the second node according to an internal reference voltage;

    a feedback impedance electrically coupled between the first node and the second node, the feedback impedance which introduces a time delay to provide feedback from the first node to the second node; and

    an output voltage sensing circuit electrically coupled to at least the second node and a output node, the output voltage sensing circuit which controls an output voltage at the output node based on the voltage at the second node,wherein the over-voltage protection loop provides the output voltage for the transformer under an error condition.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×