US 12,301,122 B2 · Isolated gate driver

Abstract

An isolated gate driver includes a transformer including primary and secondary windings, a synchronous rectifier connected between the secondary winding and an output terminal of the isolated gate driver, a first switch including a first terminal connected to a supply voltage, a second switch including a first terminal connected to the supply voltage, a first damping resistance connected between a first terminal of the secondary winding and a second terminal of the first switch, a second damping resistance connected between a second terminal of the secondary winding and a second terminal of the second switch, a first inverter including an input connected to the first terminal of the secondary winding and an output connected to a gate terminal of the first switch, and a second inverter including an input connected to the second terminal of the secondary winding and an output connected to a gate terminal of the second switch.

Claims13

Dependent claims

An isolated gate driver comprising:

a transformer including a primary winding and a secondary winding;
a synchronous rectifier electrically connected between the secondary winding and an output terminal of the isolated gate driver;
a first switch including a first terminal electrically connected to a supply voltage;
a second switch including a first terminal electrically connected to the supply voltage;
a first damping resistance electrically connected between a first terminal of the secondary winding and a second terminal of the first switch;
a second damping resistance electrically connected between a second terminal of the secondary winding and a second terminal of the second switch;
a first inverter including an input electrically connected to the first terminal of the secondary winding and an output electrically connected to a gate terminal of the first switch;
and
a second inverter including an input electrically connected to the second terminal of the secondary winding and an output electrically connected to a gate terminal of the second switch.

6 more elements

An isolated gate driver comprising:

a transformer including a primary winding and a secondary winding;
a synchronous rectifier that provides power at a power output terminal of the isolated gate driver by rectifying high and low voltages provided by a first terminal of the secondary winding and high and low voltages provided by a second terminal of the secondary winding;
a buffer circuit that provides data signals at signal output terminals of the isolated gate driver based on the high and low voltages provided by the first terminal of the secondary winding and based on the high and low voltages provided by the second terminal of the secondary winding;
and
an adjustable-damping circuit that increases an amount of damping provided on the first terminal of the secondary winding when the first terminal of the secondary winding provides the low voltage and that increases an amount of damping provided on the second terminal of the secondary winding when the second terminal of the secondary winding provides the low voltage.

2 more elements

Dependencies are inferred from the claim text.

Isolated gate driver

Life of this patent

Isolated gate driver

Life of this patent

Abstract

Claims13