Paralleling of switching devices for high power circuits
First Claim
1. A circuit comprising:
- a first half bridge comprising a first high side switch, a first low side switch, and a first gate driver, the first gate driver being configured to apply switching signals to the first high side switch and the first low side switch;
a second half bridge comprising a second high side switch, a second low side switch, and a second gate driver, the second gate driver being configured to apply switching signals to the second high side switch and the second low side switch;
a first inductor having a first side electrically connected to an output node of the first half bridge, the output node of the first half bridge being between the first high side switch and the first low side switch;
a second inductor having a first side electrically connected to an output node of the second half bridge, the output node of the second half bridge being between the second high side switch and the second low side switch; and
a main inductor coupled to a node which is between a second side of the first inductor and a second side of the second inductor;
whereinan inductance of the main inductor is greater than an inductance of each of the first and second inductors; and
the first and second inductors are inversely coupled to one another.
4 Assignments
0 Petitions
Accused Products
Abstract
A circuit includes first and second half bridges, a first inductor, a second inductor, and a main inductor. The half bridges each include a high side switch, a low side switch, and a gate driver configured to apply switching signals to the high side switch and the low side switch. The first inductor has one side electrically connected to an output node of the first half bridge between the high side switch and the low side switch. The second inductor has one side electrically connected to an output node of the second half bridge between the high side switch and the low side switch. The main inductor is coupled to a node between the other sides of the first and second inductors. The main inductor has a greater inductance than each of the first and second inductors, and the first and second inductors are inversely coupled to one another.
-
Citations
19 Claims
-
1. A circuit comprising:
-
a first half bridge comprising a first high side switch, a first low side switch, and a first gate driver, the first gate driver being configured to apply switching signals to the first high side switch and the first low side switch; a second half bridge comprising a second high side switch, a second low side switch, and a second gate driver, the second gate driver being configured to apply switching signals to the second high side switch and the second low side switch; a first inductor having a first side electrically connected to an output node of the first half bridge, the output node of the first half bridge being between the first high side switch and the first low side switch; a second inductor having a first side electrically connected to an output node of the second half bridge, the output node of the second half bridge being between the second high side switch and the second low side switch; and a main inductor coupled to a node which is between a second side of the first inductor and a second side of the second inductor;
whereinan inductance of the main inductor is greater than an inductance of each of the first and second inductors; and the first and second inductors are inversely coupled to one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A method of operating a circuit configured to provide an output current to a load, the method comprising:
-
applying, by a first gate driver of a first half bridge of the circuit, switching signals to a first high side switch and a first low side switch of the first half bridge, and responsive to the applied switching signals, providing a first output current through an output of the first half bridge; applying, by a second gate driver of a second half bridge of the circuit, switching signals to a second high side switch and a second low side switch of the second half bridge, and responsive to the applied switching signals, providing a second output current through an output of the second half bridge; during a first time period, while providing to the load the output current of the circuit at a first current level, operating both the first and second half bridges to provide the first and second output currents through their respective outputs, such that during the first time period the total output current provided to the load is a sum of the first and second output currents; and during a second time period, while providing to the load the output current of the circuit at a second current level smaller than the first current level, operating the first half bridge to provide the first output current through its output while maintaining the second half bridge in an OFF state, such that during the second time period the total output current provided to the load is equal to the first output current. - View Dependent Claims (16, 17, 18, 19)
-
Specification