Hysteretic power converter with calibration circuit
First Claim
Patent Images
1. A hysteretic power converter, comprising:
- a first comparator which is a hysteretic comparator;
a calibration circuit;
an output node arranged to have an output voltage at a first load terminal; and
a capacitor coupled to the first load terminal and a second load terminal;
whereinthe calibration circuit is configured to supply a calibrated voltage to the first comparator,the first comparator hasa first input configured to receive, from a feedback node, a feedback voltage representing at least a portion of the output voltage, wherein the feedback node is coupled to the second load terminal, anda second input coupled to the calibration circuit to receive the calibrated voltage,the calibration circuit is configured to supply the calibrated voltage processed from the feedback voltage, andthe first comparator is configured to generate, in response to a difference between the calibrated voltage processed from the feedback voltage and the feedback voltage, an output signal at a logic 1 or a logic 0 for controlling the output voltage.
1 Assignment
0 Petitions
Accused Products
Abstract
A hysteretic power converter includes a comparator, a calibration circuit, and an output node having an output voltage. The calibration circuit is configured to supply a calibrated voltage to the comparator. The comparator controls the output voltage based on the calibrated voltage and a feedback voltage representing at least a portion of the output voltage.
-
Citations
20 Claims
-
1. A hysteretic power converter, comprising:
-
a first comparator which is a hysteretic comparator; a calibration circuit; an output node arranged to have an output voltage at a first load terminal; and a capacitor coupled to the first load terminal and a second load terminal; wherein the calibration circuit is configured to supply a calibrated voltage to the first comparator, the first comparator has a first input configured to receive, from a feedback node, a feedback voltage representing at least a portion of the output voltage, wherein the feedback node is coupled to the second load terminal, and a second input coupled to the calibration circuit to receive the calibrated voltage, the calibration circuit is configured to supply the calibrated voltage processed from the feedback voltage, and the first comparator is configured to generate, in response to a difference between the calibrated voltage processed from the feedback voltage and the feedback voltage, an output signal at a logic 1 or a logic 0 for controlling the output voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method of controlling a hysteretic power converter, comprising:
-
a feedback node supplying a feedback voltage representing at least a portion of an output voltage of the hysteretic power converter to a calibration circuit and a first input of a first comparator in the hysteretic power converter, wherein the output voltage is applied at a first load terminal, wherein the feedback node is coupled to a second load terminal, and wherein a capacitor is coupled to the first load terminal and the second load terminal; the calibration circuit supplying a calibrated voltage processed from the feedback voltage to a second input of the first comparator; and the first comparator generating, in response to a difference between the calibrated voltage processed from the feedback voltage and the feedback voltage, an output signal at a logic 1 or a logic 0 for controlling the output voltage, wherein the first comparator is a hysteretic comparator. - View Dependent Claims (10, 11, 12, 13, 14)
-
-
15. An integrated circuit including a hysteretic power converter, the hysteretic power converter comprising:
-
an output node arranged to have an output voltage at a first load terminal; a first comparator having a first input arranged to receive, from a feedback node, a feedback voltage representing at least a portion of the output voltage, wherein the feedback node is coupled to a second load terminal; a capacitor coupled to the first load terminal and the second load terminal; at least one switch coupled to an output of the first comparator, the at least one switch further coupled to the output node and configured to control the output voltage; a calibration circuit; and a second comparator outside the calibration circuit, the second comparator configured to receive the feedback voltage and compare the feedback voltage to a first reference voltage, the second comparator having an output coupled to the at least one switch, wherein the calibration circuit is configured to receive the feedback voltage and supply a calibrated voltage to a second input of the first comparator based on the feedback voltage, and the first comparator and the second comparator are configured to control the at least one switch together, based on the calibrated voltage, the first reference voltage and the feedback voltage. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification