Multi-phase buck converter circuit, fault detection method and apparatus thereof, and storage medium

A fault detection method of a multi-phase buck converter circuit, the method comprising:

• detecting a fault detection point voltage at a fault detection point of a phase buck circuit in a detection period, the detection period comprising a first detection moment and a second detection moment, the first detection moment comprising a time period in which a first MOS transistor in the phase buck circuit is on, and the second detection moment comprising a time period in which a second MOS transistor in the phase buck circuit is on;
• determining, based on the fault detection point voltage in the detection period, that the phase buck circuit is faulty, the determining comprising:
• if a voltage at the first detection moment in the current detection period is higher than a first voltage threshold and a voltage at the second detection moment in the current detection period is lower than a second voltage threshold, or the voltage at the first detection moment in the current detection period is lower than the second voltage threshold and the voltage at the second detection moment in the current detection period is higher than the first voltage threshold, obtaining voltages in M historical detection periods, wherein the M historical detection periods and the current detection period are consecutive, M is a positive integer, the first voltage threshold is greater than half of a voltage of the power supply and less than the voltage of the power supply, and the second voltage threshold is less than the half of the voltage of the power supply and greater than zero;
• or
• if the voltages at the first detection moment in the M historical detection periods are all higher than the first voltage threshold and the voltages at the second detection moment in the M historical detection periods are all lower than the second voltage threshold, or the voltages at the first detection moment in the M historical detection periods are all lower than the second voltage threshold and the voltages at the second detection moment in the M historical detection periods are all higher than the first voltage threshold, determining that the phase buck circuit is faulty;
• otherwise, determining that the current-phase buck circuit is not faulty;
• and
• if the phase buck circuit is faulty, sending a disable driving signal to the drive circuit, to indicate the drive circuit stop driving the phase buck circuit.

A fault detection apparatus of a multi-phase buck converter circuit, configured to perform fault detection on the multi-phase buck converter circuit, wherein the apparatus comprises:

• a detection module configured to detect a voltage at a fault detection point of a phase buck circuit in a detection period, the detection period comprising a first detection moment and a second detection moment, the first detection moment comprising a time period in which a first MOS transistor in the phase buck circuit is on, and the second detection moment comprising a time period in which a second MOS transistor in the phase buck circuit is on;
• a determining module configured to determine, based on the voltage in the current detection period, whether the phase buck circuit is faulty, the determining module comprising:
• a first obtaining submodule configured to, if a voltage at the first detection moment in the current detection period is higher than a first voltage threshold and a voltage at the second detection moment in the current detection period is lower than a second voltage threshold, or the voltage at the first detection moment in the current detection period is lower than the second voltage threshold and the voltage at the second detection moment in the current detection period is higher than the first voltage threshold, obtain voltages in M historical detection periods, wherein the M historical detection periods and the current detection period are consecutive, M is a positive integer, the first voltage threshold is greater than a half of a voltage of a power supply and less than the voltage of the power supply, and the second voltage threshold is less than the half of the voltage of the power supply and greater than zero;
• and
• a first determining submodule configured to, if the voltages at the first detection moment in the M historical detection periods are all higher than the first voltage threshold, and the voltages at the second detection moment in the M historical detection periods are all lower than the second voltage threshold, or the voltages at the first detection moment in the M historical detection periods are all lower than the second voltage threshold, and the voltages at the second detection moment in the M historical detection periods are all higher than the first voltage threshold, determine that the phase buck circuit is faulty;
• otherwise determine that the phase buck circuit is not faulty;
• and
• a sending module configured to, if the phase buck circuit is faulty, send a disable driving signal to the drive circuit indicating the drive circuit stop driving the phase buck circuit.

A non-transitory computer-readable storage medium comprising program code, wherein when the program code is run on a computer, the computer is enabled to perform the fault detection method comprising:

• detecting a fault detection point voltage at a fault detection point of a phase buck circuit in a detection period, the detection period comprising a first detection moment and a second detection moment, the first detection moment comprising a time period in which a first MOS transistor in the phase buck circuit is on, and the second detection moment comprising a time period in which a second MOS transistor in the phase buck circuit is on;
• determining, based on the fault detection point voltage in the detection period, that the phase buck circuit is faulty, the determining comprising:
• if a voltage at the first detection moment in the current detection period is higher than a first voltage threshold and a voltage at the second detection moment in the current detection period is lower than a second voltage threshold, or the voltage at the first detection moment in the current detection period is lower than the second voltage threshold and the voltage at the second detection moment in the current detection period is higher than the first voltage threshold, obtaining voltages in M historical detection periods, wherein the M historical detection periods and the current detection period are consecutive, M is a positive integer, the first voltage threshold is greater than half of a voltage of the power supply and less than the voltage of the power supply, and the second voltage threshold is less than the half of the voltage of the power supply and greater than zero;
• or
• if the voltages at the first detection moment in the M historical detection periods are all higher than the first voltage threshold and the voltages at the second detection moment in the M historical detection periods are all lower than the second voltage threshold, or the voltages at the first detection moment in the M historical detection periods are all lower than the second voltage threshold and the voltages at the second detection moment in the M historical detection periods are all higher than the first voltage threshold, determining that the phase buck circuit is faulty;
• otherwise, determining that the current-phase buck circuit is not faulty;
• and
• if the phase buck circuit is faulty, sending a disable driving signal to the drive circuit to indicate the drive circuit stop driving the phase buck circuit.