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US 12,756,384 B2Granted
Efficient switching circuit
AssigneeSolaredge Technologies Ltd.
InventorsDaniel Zmood, Tzachi Glovinsky
Life of this patent
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Abstract
An apparatus includes a first leg having a plurality of transistors connected in series between a first node and a second node. Each of the plurality of transistors includes a respective body diode. The apparatus further includes a second leg connected between the first node and the second node and in parallel to the series connection of the plurality of transistors of the first leg. The second leg includes a first transistor. The second leg has lower reverse recovery losses relative to the first leg.
Claims20
An apparatus comprising:
- a first leg comprising a plurality of first transistors connected in series between a first node and a second node, wherein each of the plurality of first transistors comprises a respective first body diode oriented in a same direction of current conduction;
- a second leg connected between the first node and the second node and in parallel to the first leg, wherein the second leg comprises a second transistor;
- a third leg connected between the first node and the second node and in parallel to the first leg and the second leg, wherein the third leg comprises a first diode, and wherein the third leg has lower reverse recovery losses relative to at least one of the first leg or the second leg;
- and
- a controller configured to:
- transition the apparatus from a non-conduction period to a conduction period by turning, at a first time, the second transistor of the second leg from an OFF state to an ON state and turning, at a second time later than the first time, the plurality of first transistors of the first leg from an OFF state to an ON state;
- and
- transition the apparatus from the conduction period to the non-conduction period by turning, at a third time, the plurality of first transistors of the first leg from the ON state to the OFF state and turning, at a fourth time later than the third time, the second transistor of the second leg from the ON state to the OFF state.
5 more elements
A method comprising:
- connecting, in series between a first node and a second node, a first leg comprising a plurality of first transistors, wherein each of the plurality of first transistors comprises a respective first body diode oriented in a same direction of current conduction;
- connecting a second leg between the first node and the second node and in parallel to the first leg, wherein the second leg comprises a second transistor;
- connecting a third leg between the first node and the second node and in parallel to the first leg and the second leg, wherein the third leg comprises a first diode, and wherein the third leg has lower reverse recovery losses relative to at least one of the first leg or the second leg;
- transitioning from a non-conduction period between the first node and the second node to a conduction period between the first node and the second node by:
- turning, at a first time, the second transistor of the second leg from an OFF state to an ON state;
- and
- turning, at a second time later than the first time, the plurality of first transistors of the first leg from an OFF state to an ON state;
- and
- transitioning from the conduction period to the non-conduction period by:
- turning, at a third time, the plurality of first transistors of the first leg from the ON state to the OFF state;
- and
- turning, at a fourth time later than the third time, the second transistor of the second leg from the ON state to the OFF state.
9 more elements
Dependencies are inferred from the claim text.