System and device for high-side supply
First Claim
1. An electrical circuit comprising:
- a ground-referenced power transistor and a non-ground-referenced power transistor configured in a half-bridge topology, the non-ground-referenced power transistor having a first conducting electrode coupled to a high voltage power supply, a control electrode coupled to a high-side pre-driver, and a second conducting electrode coupled to a switch node;
a boot-strapped capacitor having a bottom plate coupled to the second conducting electrode for providing a floating-ground voltage thereto, and having a top plate coupled to the high-side pre-driver;
an interface portion including an adaptive boot-strapped capacitor regulator (hereinafter, “
regulator”
), wherein the interface portion selectively turns OFF and ON the ground-referenced power transistor and the non-ground-referenced power transistor;
a first sense device including a high-voltage, enhancement-mode, GaN HEMT for sensing a voltage at the top plate, having a gate terminal coupled to the regulator, a source terminal coupled to the regulator and a drain terminal coupled to the top plate through a diode;
a second sense device, coupled to the regulator, for sensing a voltage at the bottom plate; and
a charging device coupled to the regulator and to the top plate, the charging device for selectively increasing the voltage at the top plate,wherein the regulator controls the charging device based on the voltage at the top plate and the voltage at the bottom plate.
1 Assignment
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Accused Products
Abstract
An electrical circuit includes a ground-referenced transistor and a non-ground-referenced transistor configured in a half-bridge topology. The non-ground-referenced power transistor has a first conducting electrode coupled to a high voltage power supply, a control electrode coupled to a high-side pre-driver, and a second conducting electrode coupled to a switch node. The electrical circuit further includes a boot-strapped capacitor having a bottom plate coupled to the second conducting electrode and a top plate coupled to the high-side pre-driver, and an interface coupled to a first sense device for sensing a voltage at the top plate, a second sense device for sensing a voltage at the bottom plate, and a charging device for selectively increasing the voltage at the top plate. The interface controls the charging device based on the voltage at the top plate and the voltage at the bottom plate.
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Citations
20 Claims
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1. An electrical circuit comprising:
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a ground-referenced power transistor and a non-ground-referenced power transistor configured in a half-bridge topology, the non-ground-referenced power transistor having a first conducting electrode coupled to a high voltage power supply, a control electrode coupled to a high-side pre-driver, and a second conducting electrode coupled to a switch node; a boot-strapped capacitor having a bottom plate coupled to the second conducting electrode for providing a floating-ground voltage thereto, and having a top plate coupled to the high-side pre-driver; an interface portion including an adaptive boot-strapped capacitor regulator (hereinafter, “
regulator”
), wherein the interface portion selectively turns OFF and ON the ground-referenced power transistor and the non-ground-referenced power transistor;a first sense device including a high-voltage, enhancement-mode, GaN HEMT for sensing a voltage at the top plate, having a gate terminal coupled to the regulator, a source terminal coupled to the regulator and a drain terminal coupled to the top plate through a diode; a second sense device, coupled to the regulator, for sensing a voltage at the bottom plate; and a charging device coupled to the regulator and to the top plate, the charging device for selectively increasing the voltage at the top plate, wherein the regulator controls the charging device based on the voltage at the top plate and the voltage at the bottom plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An electrical circuit comprising:
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a ground-referenced power transistor and a non-ground-referenced power transistor configured in a half-bridge topology, the non-ground-referenced power transistor having a first conducting electrode coupled to a high voltage power supply, a control electrode coupled to a high-side pre-driver, and a second conducting electrode coupled to a switch node; a boot-strapped capacitor having a bottom plate coupled to the second conducting electrode for providing a floating-ground voltage thereto, and having a top plate coupled to the high-side pre-driver; an interface portion including an adaptive boot-strapped capacitor regulator (hereinafter, “
regulator”
), wherein the interface portion selectively turns OFF and ON the ground-referenced power transistor and the non-ground-referenced power transistor, and wherein the regulator includes a comparison signal-generating circuit coupled to the source terminal of the first sense device, to the source terminal of the second sense device and to a reference voltage, the comparison signal-generating circuit further including a comparator, wherein the comparison signal-generating circuit determines a difference between a signal at the source terminal of the first sense device and a signal at the source terminal of the second sense device, and wherein the comparator compares the difference with the reference voltage and, in response thereto, produces a first intermediate signal;a first sense device, coupled to the regulator, for sensing a voltage at the top plate; a second sense device, coupled to the regulator, for sensing a voltage at the bottom plate; and a charging device coupled to the regulator and to the top plate, the charging device for selectively increasing the voltage at the top plate, wherein the regulator controls the charging device based on the voltage at the top plate and the voltage at the bottom plate, and wherein the comparison signal-generating circuit includes a de-glitch module that receives the first intermediate signal and that outputs a second intermediate signal representative of the first intermediate signal without any chattering that may be present in the first intermediate signal. - View Dependent Claims (14, 15, 16, 17)
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18. An electrical circuit comprising:
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a ground-referenced power transistor and a non-ground-referenced power transistor configured in a half-bridge topology, the non-ground-referenced power transistor having a first conducting electrode coupled to a high voltage power supply, a control electrode coupled to a high-side pre-driver, and a second conducting electrode coupled to a switch node; a boot-strapped capacitor having a bottom plate coupled to the second conducting electrode for providing a floating-ground voltage thereto, and having a top plate coupled to the high-side pre-driver; an interface portion including an adaptive boot-strapped capacitor regulator (hereinafter, “
regulator”
), wherein the interface portion selectively turns OFF and ON the ground-referenced power transistor and the non-ground-referenced power transistor;a first sense device, coupled to the regulator, for sensing a voltage at the top plate; a second sense device, coupled to the regulator, for sensing a voltage at the bottom plate; and a charging device coupled to the regulator and to the top plate, the charging device for selectively increasing the voltage at the top plate, wherein the regulator controls the charging device based on the voltage at the top plate and the voltage at the bottom plate, wherein the ground-referenced power transistor is an N-channel, enhancement-mode, GaN HEMT having a drain terminal coupled to the switch node, a source terminal coupled to ground potential and a gate terminal coupled to a low-side pre-driver, wherein the low-side pre-driver selectively provides to the gate terminal of the ground-referenced power transistor a gate voltage having one of a value that turns ON the ground-referenced power transistor and another value that turns OFF the ground-referenced power transistor, based on a signal from the interface portion, and wherein the gate voltage of the ground-referenced power transistor is level shifted and inverted, and then fed back to the regulator. - View Dependent Claims (19, 20)
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Specification