Granted Patent B2

US 12,597,841 · App. 18/617,161 · Granted Apr 7, 2026

Inventor: Lei Li (Chengdu, CN)

Assignee: Chengdu Monolithic Power Systems Co., Ltd.

H02M1/0003H02M1/14H02M3/04

Abstract

Claims (72)

1 . A multiphase power supply, comprising:

a plurality of integrated circuits, each of the integrated circuits having:

an input pin, configured to receive an input voltage;

a converter, configured to convert the input voltage to a desired output voltage; and

a status pin, wherein the status pins of all the integrated circuits are coupled together, to synchronize a state of all the integrated circuits; and wherein the state of the integrated circuits comprises: a power on state, a power off state, and a normal operation state.

2 . The multiphase power supply of claim 1 , wherein:

all the integrated circuits are controlled to enter the power on state if the status pin is pulled high;

all the integrated circuits are controlled to enter the power off state if the status pin is pulled low; and

all the integrated circuits are controlled to enter the normal operation state if the status pin is pulled to a medium value.

3 . The multiphase power supply of claim 1 , wherein each of the integrated circuits further has a control circuit, and wherein the control circuit comprises:

a first comparator, configured to compare a voltage at the status pin with a power off voltage threshold, to generate a power off signal, to control the converter to enter a power off state;

a second comparator, configured to compare the voltage at the status pin with a power on voltage threshold, to generate a power on signal, to control the converter to enter a power on state; and

a third comparator, configured to compare the voltage at the status pin with a medium voltage threshold, to generate a control signal, to control the converter to enter a normal operation state.

4 . The multiphase power supply of claim 1 , wherein:

all the integrated circuits are controlled to enter a power on state if a voltage of the status pin is pulled high;

all the integrated circuits are controlled to enter a power off state if the voltage of the status pin is pulled low;

all the integrated circuits are controlled to enter continuous current mode if a voltage value at the status pin is higher than a first threshold;

all the integrated circuits are controlled to enter discontinuous current mode if the voltage value at the status pin is higher than a second threshold;

all the integrated circuits are controlled to enter critical current mode if the voltage value at the status pin is higher than a third threshold;

all the integrated circuits are controlled to enter over voltage protection mode if the voltage value at the status pin is higher than a fourth threshold; and

all the integrated circuits are controlled to enter under voltage protection mode if the voltage value at the status pin is higher than a fifth threshold.

5 . The multiphase power supply of claim 1 , wherein each of the integrated circuits further has a control circuit, and wherein the control circuit comprises:

a first comparator, configured to compare a voltage at the status pin with a power off threshold, to generate a power off signal, to control the converter to enter a power off state;

a second comparator, configured to compare the voltage at the status pin with a power on threshold, to generate a power on signal, to control the converter to enter a power on state;

a third comparator, configured to compare the voltage at the status pin with a first threshold, to generate a first control signal, to control the converter to enter a first operation mode; and

a fourth comparator, configured to compare the voltage at the status pin with a second threshold, to generate a second control signal, to control the converter to enter a second operation mode.

6 . The multiphase power supply of claim 1 , wherein each of the integrated circuits further has:

a set pin, wherein the set pins of all the integrated circuits are coupled together, to set a switching frequency of the integrated circuits.

7 . A multiphase power supply, comprising:

a plurality of integrated circuits configured to convert an input voltage to an output voltage, each of the integrated circuits having:

an input pin, configured to receive the input voltage;

a status pin, wherein the status pins of all the integrated circuits are coupled together, to synchronize a state of all the integrated circuits; and

a set pin, wherein the set pins of all the integrated circuits are coupled together, to set a switching frequency of the integrated circuits; and wherein the state of the integrated circuits comprises: a power on state, a power off state, and a normal operation state.

8 . The multiphase power supply of claim 7 , wherein:

all the integrated circuits are controlled to enter the power on state if the status pin is pulled high;

all the integrated circuits are controlled to enter the power off state if the status pin is pulled low; and

all the integrated circuits are controlled to enter the normal operation state if the status pin is pulled to a medium value.

9 . The multiphase power supply of claim 7 , wherein each of the integrated circuits has a converter and a control circuit, wherein the converter is configured to convert the input voltage to the output voltage, and wherein the control circuit comprises:

a first comparator, configured to compare a voltage at the status pin with a power off threshold, to generate a power off signal, to control the converter to enter a power off state;

a second comparator, configured to compare the voltage at the status pin with a power on threshold, to generate a power on signal, to control the converter to enter a power on state; and

a third comparator, configured to compare the voltage at the status pin with a medium threshold, to generate a control signal, to control the converter to enter a normal operation state.

10 . The multiphase power supply of claim 7 , comprising:

all the integrated circuits are controlled to enter a power on state if the status pin is pulled high;

all the integrated circuits are controlled to enter a power off state if the status pin is pulled low;

all the integrated circuits are controlled to enter continuous current mode if a voltage value at the status pin is higher than a first threshold;

all the integrated circuits are controlled to enter discontinuous current mode if the voltage value at the status pin is higher than a second threshold;

all the integrated circuits are controlled to enter critical current mode if the voltage value at the status pin is higher than a third threshold;

all the integrated circuits are controlled to enter over voltage protection mode if the voltage value at the status pin is higher than a fourth threshold; and

all the integrated circuits are controlled to enter under voltage protection mode if the voltage value at the status pin is higher than a fifth threshold.

11 . The multiphase power supply of claim 7 , wherein each of the integrated circuits has a converter and a control circuit, wherein the converter is configured to convert the input voltage to the output voltage, and wherein the control circuit comprises:

a first comparator, configured to compare a voltage at the status pin with a power off threshold, to generate a power off signal, to control the converter to enter a power off state;

a second comparator, configured to compare the voltage at the status pin with a power on threshold, to generate a power on signal, to control the converter to enter a power on state; and

a third comparator, configured to compare the voltage at the status pin with a first threshold, to generate a first control signal, to control the converter to enter a first operation mode; and

a fourth comparator, configured to compare the voltage at the status pin with a second threshold, to generate a second control signal, to control the converter to enter a second operation mode.

12 . An integrated circuit used in a multiphase power supply, wherein the multiphase power supply includes a plurality of integrated circuits, each of the integrated circuit comprising:

an input pin, configured to receive an input voltage;

a converter, configured to convert the input voltage to a desired output voltage; and

a status pin, wherein the status pins of all the integrated circuits are coupled together, to synchronize a state of all the integrated circuits; and wherein the state comprises: a power on state, a power off state, and a normal operation state.

13 . The integrated circuit of claim 12 , wherein the integrated circuit is controlled to:

enter the power on state if the status pin is pulled high;

enter the power off state if the status pin is pulled low; and

enter the normal operation state if the status pin is pulled to a medium value.

14 . The integrated circuit of claim 12 , wherein the integrated circuit is controlled to:

enter a power on state if a voltage of the status pin is pulled high;

enter a power off state if the voltage of the status pin is pulled low;

enter continuous current mode if a voltage value at the status pin is higher than a first threshold;

enter discontinuous current mode if the voltage value at the status pin is higher than a second threshold;

enter critical current mode if the voltage value at the status pin is higher than a third threshold;

enter over voltage protection mode if the voltage value at the status pin is higher than a fourth threshold; and

enter under voltage protection mode if the voltage value at the status pin is higher than a fifth threshold.

15 . The integrated circuit of claim 12 , further comprising:

a set pin, wherein the set pins of all the integrated circuits are coupled together, to set a switching frequency of the integrated circuits.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (13)