Power conversion device

A power conversion device, comprising:

• a path module, configured to receive an input power and provide an output power, and comprising:
• a first path;
• and
• a second path, connected to the first path in parallel;
• and
• a control module, coupled to the path module, and configured to detect the input power and the output power and generate, based on at least two of an input voltage value and an input current value of the input power and an output voltage value of the output power, a first control signal for controlling the first path and a second control signal for controlling the second path, wherein the first path and the second path are not simultaneously conducted, wherein
• when the input voltage value received by the path module is less than a first threshold and a boosting operation is performed for the first time, the control module generates the first control signal to interrupt the first path to stop outputting the input power, and adjusts a duty cycle of the second control signal to a first duty cycle based on at least the input current value and the input voltage value, so as to stabilize the output voltage value,
• when a duration for which the duty cycle of the second control signal is maintained to be the first duty cycle is greater than or equal to a maintenance duration, the control module adjusts the second control signal to stop operation of the second path,
• when the input voltage value received by the path module is less than the first threshold and the boosting operation is not performed for the first time, the control module determines the output voltage value, and
• when the control module determines that the output voltage value is less than or equal to a second threshold and is greater than or equal to a third threshold, the control module generates the first control signal to interrupt the first path to stop outputting the input power, and adjusts the duty cycle of the second control signal to a second duty cycle based on at least the input voltage value and the output voltage value, so as to stabilize the output voltage value, wherein the second threshold is greater than the third threshold, and
• when a duration for which the duty cycle of the second control signal is maintained to be the second duty cycle is greater than or equal to the maintenance duration, the control module adjusts the second control signal to stop operation of the second path.