Digital dynamic delay modulator and the method thereof for flyback converter

A digital dynamic delay modulator for flyback converter, comprising:

• a differentiator receiving a first input voltage signal sent from the flyback converter;
• a digital controller electrically connected to the differentiator and having a predetermined count number, wherein the predetermined count number is an integer;
• and
• an oscillator electrically connected to the digital controller,
• wherein the digital controller is configured to enable the oscillator when the digital controller receives an initialization signal indicative that the first input voltage signal reaches a threshold voltage, and is configured to perform counting according to the predetermined count number, the digital controller is configured to generate a first output signal to turn on a switching device for the flyback converter when the predetermined count number is counted;
• wherein the differentiator detects a slope of the first input voltage signal when the differentiator receives a second input voltage signal indicative that the switching device is turned on, the digital controller is configured to change the predetermined count number by an integer adjustment according to the slope.