Half-bridge gate driver optimized for hard-switching
First Claim
1. A gate driver circuit for a half-bridge derived switching power converter having a high-side switch coupled to a negative potential and a low-side switch coupled to the negative potential, the gate driver circuit comprising:
- a first high-side driver circuit referenced to a common potential, the first high-side driver circuit capable of driving the high-side switch to produce a first output; and
a second high-side driver circuit referenced to the common potential, the second high-side driver circuit capable of driving a low-side switch to produce a second output, where the common potential remains more negative than the first output.
5 Assignments
0 Petitions
Accused Products
Abstract
A half-bridge gate driver circuit including two separate floating high-side driver circuits for operating a switch circuit having a high-side switch and a low-side switch. Each of the driver circuits include input control logic which is referenced to a supply signal with a potential that becomes negative relative to the negative common terminal of the switches, thereby enhancing the operation of the switch circuit. The circuit may further include signal translation stages for translating control signals to the control logic of the driver circuits. The signal translation stages include a plurality of cascoded parasitic transistors which provide a neutralizing capacitance to minimize noise.
49 Citations
28 Claims
-
1. A gate driver circuit for a half-bridge derived switching power converter having a high-side switch coupled to a negative potential and a low-side switch coupled to the negative potential, the gate driver circuit comprising:
-
a first high-side driver circuit referenced to a common potential, the first high-side driver circuit capable of driving the high-side switch to produce a first output; and
a second high-side driver circuit referenced to the common potential, the second high-side driver circuit capable of driving a low-side switch to produce a second output, where the common potential remains more negative than the first output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A gate driver circuit for a half-bridge derived switching power converter having a first switch coupled to a negative potential and a positive potential that define a potential range therebetween, and a second switch also coupled to the positive and negative potentials, the gate driver circuit comprising:
-
a first high-side driver circuit capable of operating the first switch; and
a second high-side driver circuit capable of operating the second switch;
where the first and second high-side driver circuits are supplied with a power input that is referenced to a common potential, the common potential is dynamically adjustable to be outside the potential range when an output of the first switch becomes more negative than the negative potential. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
-
-
20. A half-bridge derived switching power converter comprising:
-
a high-side switch having an output, where the output of the high-side switch is coupled with a negative supply voltage;
a low-side switch having an output, where the output of the low-side switch is coupled with a positive supply voltage, and also inductively coupled with the output of the high-side switch;
a first high-side driver circuit operable to drive the high-side switch as a function of an input signal;
a second high-side driver circuit operable to drive the low-side switch as a function of an input signal; and
a reference supply voltage supplied to the first and second high-side driver circuits, where the reference supply voltage remains more negative than the output of the high-side switch. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
-
Specification