Digital regulator system and control method thereof
AssigneeNuvoton Technology Corporation
InventorsChung Ming Hsieh, Ching-Yen Chiu
Life of this patent
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Abstract
A digital regulator system is provided. The digital regulator system includes a digital regulator circuit and a compensation circuit. The digital regulator circuit outputs an output current and an output voltage. The digital regulator circuit adjust the output current by decreasing or increasing a unit current according to at least a reference voltage and a feedback voltage. The compensation circuit receives the output voltage as well as decreases or increases a unit voltage of the output voltage to generate and output the feedback voltage according to the variation of the output current.
Claims11
A digital regulator system, comprising:
- a digital regulator circuit outputting an output current and an output voltage, and comprising a plurality of current units, wherein each of the plurality current units outputs the unit current when being turned on, and the digital regulator circuit is configured to turn on or turn off at least one of the plurality of current units to adjust the output current by decreasing or increasing a unit current according to at least a reference voltage and a feedback voltage;
- and
- a compensation circuit receiving the output voltage, and decreasing or increasing the output voltage by a unit voltage to generate and output the feedback voltage according to a variation of the output current;
- wherein the compensation circuit decreases the unit voltage for the output voltage to generate and output the feedback voltage when the output current decreases the unit current;
- wherein the compensation circuit increases the unit voltage for the output voltage to generate and output the feedback voltage when the output current increases the unit current.
A control method of a digital regulator system comprising a digital regulator circuit and a compensation circuit, wherein the digital regulator circuit outputs an output current and an output voltage, and the digital regulator circuit adjusts the output current to decrease or increase by a unit current according to a first reference voltage, a second reference voltage and a feedback voltage, wherein the control method comprises:
- receiving the output voltage, and decreasing or increasing a unit voltage to generate and output the feedback voltage according to the variation of the output current;
- wherein the unit voltage satisfies the following conditions:
- ΔV>(VREF_H−VREF_R)/2;
- wherein ΔV is the unit voltage, the VREF_H is the first reference voltage, and the VREF_R is the second reference voltage, wherein the first reference voltage is larger than the second reference voltage.
A control method of a digital regulator system comprising a digital regulator circuit and a compensation circuit, wherein the digital regulator circuit outputs an output current and an output voltage, and the digital regulator circuit adjusts the output current to decrease or increase by a unit current according to a first reference voltage, a second reference voltage and a feedback voltage, wherein the control method comprises:
- receiving the output voltage, and decreasing or increasing the output voltage by a unit voltage to generate and output the feedback voltage according to the variation of the output current;
- wherein the compensation circuit decreases the unit voltage for the output voltage to generate and output the feedback voltage when the output current decreases the unit current;
- wherein the compensation circuit increases the unit voltage for the output voltage to generate and output the feedback voltage when the output current increases the unit current.
Dependencies are inferred from the claim text.