Power supply conversion device

A power supply conversion device, comprising:

• a voltage converter, receiving an input voltage, and converting the input voltage according to a control signal to generate an output voltage;
• a turned-off time detector, coupled to the voltage converter, and detecting a time length of the control signal in a turned-off state to generate detection information;
• a turned-on time adjuster, coupled to the turned-off time detector and the voltage converter, and adjusting a time length of the control signal in a turned-on state according to the detection information;
• and
• a slope signal adjuster, coupled to the turned-off time detector and the voltage converter, adjusting a rising rate of a switching signal on a switching switch of the voltage converter according to the detection information to generate a slope signal, generating a feedback signal according to the slope signal, and providing the feedback signal to the voltage converter.