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US 12,719,467 B2Granted
Controlling a power switching element using a sense switching element
AssigneeInfineon Technologies AG
InventorsRazvan Puscasu, Vlad-George Moise
Life of this patent
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Abstract
A circuit for controlling a power switching element includes a driving switching element configured to couple a voltage supply to a gate of the power switching element using a driving current and a sense switching element configured to generate an indication of a voltage drop at the driving switching element based on a reference current. The circuit further includes driving circuitry configured to generate the driving current, the driving current including both a control current proportional to the reference current and a compensation current based on the indication of the voltage drop at the driving switching element.
Claims19
A circuit for controlling a power switching element, the circuit comprising:
- a driving switching element configured to couple a voltage supply to a gate of the power switching element using a driving current;
- a sense switching element configured to generate an indication of a voltage drop at the driving switching element based on a reference current;
- and
- driving circuitry configured to generate the driving current, the driving current including both a control current proportional to the reference current and a compensation current based on the indication of the voltage drop at the driving switching element, wherein the driving circuitry comprises:
- compensation circuitry configured to generate a correction current using the indication of the voltage drop generated by the sense switching element;
- a charge current generator configured to generate a charge current using a corrected reference current, the corrected reference current comprising a combination of the reference current and the correction current;
- and
- a driving stage configured to generate the driving current based on the charge current.
5 more elements
A circuit for controlling a power switching element, the circuit comprising:
- a driving switching element configured to couple a voltage supply to a gate of the power switching element using a driving current;
- a sense switching element configured to generate an indication of a voltage drop at the driving switching element based on a reference current;
- and
- driving circuitry configured to generate the driving current, the driving current including both a control current proportional to the reference current and a compensation current based on the indication of the voltage drop at the driving switching element,
- wherein the driving circuitry comprises:
- a charge current generator configured to generate the control current based on the reference current;
- compensation circuitry configured to:
- generate the compensation current using the indication of the voltage drop generated by the sense switching element;
- and
- generate a corrected charge current based on the control current and the compensation current;
- and
- a driving stage configured to generate the driving current based on the corrected charge current.
9 more elements
A system comprising:
- a power switching element;
- a driving switching element configured to couple a voltage supply to a gate of the power switching element based on a driving current;
- a sense switching element configured to generate an indication of a voltage drop at the driving switching element based on a reference current;
- and
- driving circuitry configured to generate the driving current, the driving current including both a control current proportional to the reference current and a compensation current based on the indication of the voltage drop at the driving switching element, wherein the driving circuitry comprises:
- compensation circuitry configured to generate a correction current using the indication of the voltage drop generated by the sense switching element;
- a charge current generator configured to generate a charge current using a corrected reference current, the corrected reference current comprising a combination of the reference current and the correction current;
- and
- a driving stage configured to generate the driving current based on the charge current.
6 more elements
A method comprising:
- generating an indication of a voltage drop at a driving switching element based on a reference current;
- generating a driving current to include both a control current proportional to the reference current and a compensation current based on the indication of the voltage drop at the driving switching element, wherein the driving switching element is configured to couple a voltage supply to a gate of a power switching element based on the driving current, wherein generating the driving current comprises:
- generating a correction current using the indication of the voltage drop;
- generating a charge current using a corrected reference current, the corrected reference current comprising a combination of the reference current and the correction current;
- and
- generating the driving current based on the charge current.
3 more elements
A method comprising:
- generating an indication of a voltage drop at a driving switching element based on a reference current;
- generating a driving current to include both a control current proportional to the reference current and a compensation current based on the indication of the voltage drop at the driving switching element, wherein the driving switching element is configured to couple a voltage supply to a gate of a power switching element based on the driving current, wherein generating the driving current comprises:
- generating the control current based on the reference current;
- generating the compensation current using the indication of the voltage drop;
- generating a corrected charge current based on the control current and the compensation current;
- and
- generating the driving current based on the corrected charge current.
4 more elements
Dependencies are inferred from the claim text.