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US 11,063,583 B2Granted
Multi-sense circuit for parallel-connected power switches
AssigneeInfineon Technologies AG
InventorsMarcus Nuebling, Tom Roewe
Life of this patent
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Abstract
A multi-sense circuit includes a transistor circuit having sense nodes and a gate node, a peak detector having inputs coupled to the sense nodes of the transistor circuit and an output, and a control circuit having a gate control node coupled to the gate node of the transistor circuit and an overcurrent protection node coupled to the output of the peak detector.
Claims20
A circuit comprising:
- a transistor subcircuit having a plurality of sense nodes and a gate node;
- a peak detector having a plurality of inputs coupled to the plurality of sense nodes of the transistor subcircuit, and an output;
- and
- a control subcircuit having a gate control node coupled to the gate node of the transistor subcircuit and an overcurrent protection node coupled to the output of the peak detector,
- wherein the transistor subcircuit comprises a plurality of parallel-connected transistors, each transistor of the plurality of parallel-connected transistors having a collector coupled to a first current node of the transistor subcircuit, an emitter coupled to a second current node of the transistor subcircuit, and a gate coupled to the gate node of the transistor subcircuit.
2 more elements
A circuit comprising:
- a transistor subcircuit having a plurality of sense nodes and a gate node;
- a peak detector having a plurality of inputs coupled to the plurality of sense nodes of the transistor subcircuit, and an output;
- and
- a control subcircuit having a gate control node coupled to the gate node of the transistor subcircuit and an overcurrent protection node coupled to the output of the peak detector,
- wherein the peak detector comprises a plurality of diodes, each diode of the plurality of diodes having an anode respectively coupled to an input of the plurality of inputs of the peak detector and a cathode coupled to the output of the peak detector.
2 more elements
A method of operating a circuit having a transistor subcircuit having a plurality of sense nodes and a gate node;
- a peak detector having a plurality of inputs coupled to the plurality of sense nodes of the transistor subcircuit, and an output;
- and a control subcircuit having a gate control node coupled to the gate node of the transistor subcircuit and an overcurrent protection node coupled to the output of the peak detector, wherein the transistor subcircuit comprises a plurality of parallel-connected transistors, each transistor of the plurality of parallel-connected transistors having a collector coupled to a first current node of the transistor subcircuit, an emitter coupled to a second current node of the transistor subcircuit, and a gate coupled to the gate node of the transistor subcircuit, the method comprising:
- detecting a peak voltage produced by the plurality of sense nodes using the peak detector.
Dependencies are inferred from the claim text.