Layout of gate driver circuit for high-speed switching devices
AssigneeMurata Manufacturing Co., Ltd.
InventorsShohei Masuda, Ahmad Yafaoui, Andrew Dickson
Life of this patent
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Abstract
A switching circuit includes a first switch; a second switch connected in series with the first switch; a first isolated driver connected to a gate terminal of the first switch; a second isolated driver connected to a gate terminal of the second switch; and a transformer including a primary winding connected to an auxiliary power supply, a first secondary winding to supply a first voltage to the first isolated driver, and a second secondary winding to supply a second voltage to the second isolated driver.
Claims21
A switching circuit comprising:
- a first switch;
- a second switch connected in series with the first switch;
- a first isolated driver connected to a gate terminal of the first switch;
- a second isolated driver connected to a gate terminal of the second switch;
- and
- a transformer including a primary winding connected to an auxiliary power supply, a first secondary winding to supply a first voltage to the first isolated driver, and a second secondary winding to supply a second voltage to the second isolated driver;
- wherein
- a length of at least one of a first gate line connected between the first isolated driver and the gate terminal of the first switch and a second gate line connected between the second isolated driver and the gate terminal of the second switch is equal to or shorter than a width of at least one of the first switch and the second switch.
A switching circuit comprising:
- a first switch;
- a second switch connected in series with the first switch;
- a first isolated driver connected to a gate terminal of the first switch;
- a second isolated driver connected to a gate terminal of the second switch;
- and
- a transformer including a primary winding connected to an auxiliary power supply, a first secondary winding to supply a first voltage to the first isolated driver, and a second secondary winding to supply a second voltage to the second isolated driver;
- wherein
- a first gate-line current loop of the first switch is defined by a path from the first isolated driver to the gate terminal of the first switch and to a ground terminal of the first isolated driver;
- a second gate-line current loop of the second switch is defined by a path from the second isolated driver to the gate terminal of the second switch and to a ground terminal of the second isolated driver;
- and
- a length of at least one of the first gate-line current loop and the second gate-line current loop is equal to or shorter than a width of at least one of the first switch and the second switch.
A gate driver device comprising:
- a substrate including terminals to receive an auxiliary voltage from an auxiliary power supply that is not located on the substrate;
- a first switch and a second switch that are located on the substrate and that are connected in series;
- a first isolated driver that is located on the substrate, that is connected to the first switch, and that includes first input circuitry and first output circuitry that are isolated from each other;
- a second isolated driver that is located on the substrate, that is connected to the second switch, and that includes second input circuitry and second output circuitry that are isolated from each other;
- a transformer that is located on the substrate and that includes:
- a primary winding to receive the auxiliary voltage;
- a first secondary winding to supply a first voltage to the first output circuitry;
- and
- a second secondary winding to supply a second voltage to the second output circuitry.
Dependencies are inferred from the claim text.