US 12,681,519 B2 · Multi-phase voltage regulator and current balancing circuit

Abstract

A multi-phase voltage regulator is coupled to a multi-phase DC-DC converter and comprises multiple voltage regulator circuits. The voltage regulator circuit is coupled between a power output stage circuit and a compensation circuit, and is configured to generate multiple control signals according to a compensation signal, so that the power output stage circuit generates multiple output currents. The voltage regulator circuit comprises a current comparison circuit and a delay circuit. The current comparison circuit is configured to obtain a error signal. The error signal is the difference between a threshold current and the corresponding output current. The delay circuit is is configured to generate a corresponding control signal according to the compensation signal. The delay circuit is configured to adjust a bias current in the delay circuit according to the error signal to adjust a duty cycle of the corresponding control signal.

Claims20

Dependent claims

A multi-phase voltage regulator, coupled to a multi-phase direct current converter, and comprising:

a plurality of voltage regulator circuits, coupled between a power output stage circuit and a compensation circuit, and configured to generate a plurality of control signals according to a compensation signal, so that the power output stage circuit generates a plurality of output currents,
wherein one of the plurality of voltage regulator circuits comprises:
a current comparison circuit, configured to obtain an error signal, wherein the error signal is a difference between a threshold current and a corresponding one of the plurality of output currents;
and
a delay circuit, coupled to the compensation circuit and the current comparison circuit, and configured to generate a corresponding one of the plurality of control signals according to the compensation signal, wherein the delay circuit is configured to adjust a bias current in the delay circuit according to the error signal to adjust a duty cycle of the corresponding one of the plurality of control signals.

2 more elements

A multi-phase current balancing circuit, applied to a multi-phase direct current converter, comprising:

a current detection circuit, coupled to a power output stage circuit of the multi-phase direct current converter to receive a plurality of output currents and a threshold current;
and
a plurality of voltage regulator circuits, coupled to between the current detection circuit and a compensation circuit of the multi-phase direct current converter, and configured to generate a plurality of control signals according to a compensation signal, so that the power output stage circuit generates the plurality of output currents;
wherein one of the plurality of voltage regulator circuits comprises:
a current comparison circuit, configured to obtain an error signal, wherein the error signal is a difference between the threshold current and a corresponding one of the plurality of output currents;
and
a delay circuit, coupled to the compensation circuit and the current comparison circuit, and configured to generate a corresponding one of the plurality of control signals according to the compensation signal, wherein the delay circuit is configured to adjust a bias current in the delay circuit according to the error signal to adjust a duty cycle of the corresponding one of the plurality of control signals.

4 more elements

Dependencies are inferred from the claim text.

Multi-phase voltage regulator and current balancing circuit

Life of this patent

Multi-phase voltage regulator and current balancing circuit

Life of this patent

Abstract

Claims20