Patent ID: 11962234
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A circuit, comprising:
a plurality of gate drivers, wherein each of the gate drivers is configured to control a respective transistor of a transistor bridge circuit, and the transistor bridge circuit is adapted to be coupled to a transformer;
a pulse width modulation (PWM) controller having outputs coupled to respective gate drivers of the plurality of gate drivers, wherein the PWM controller is configured to implement a repeating pattern, the repeating pattern including:
a first pattern portion in which a first pair of the plurality of gate drivers is activated to cause current to flow through the transformer;
a second pattern portion in which a second pair of the plurality of gate drivers is activated without current flowing through the transformer;
a third pattern portion in which a third pair of the plurality of gate drivers is activated to cause current to flow through the transformer; and
a fourth pattern portion in which a fourth pair of the plurality of gate drivers is activated without current flowing through the transformer; and

a current limit circuit having a current limit circuit input and a current limit circuit output, wherein the current limit circuit output is coupled to the plurality of gate drivers, and the current limit circuit is configured to assert a control signal on the current limit circuit output responsive to a current through the transistor bridge circuit exceeding a threshold.