Constant on-time (COT) control in isolated converter

A constant on-time (COT) isolated converter connected to an input terminal for receiving an input voltage, the COT isolated converter comprising:

• a transformer comprising
• a primary side;
• and
• a secondary side;
• the primary side being connected to the input terminal and the secondary side being connected to a load;
• a processor connected to the secondary side of the transformer and the load;
• the processor receiving an output voltage or an output current applied onto the load to generate a control signal;
• a driver connected to the primary side of the transformer;
• the driver receiving and amplifying the control signal to generate a first digital signal;
• and
• a first electronic switch connected to the primary side of the transformer and the driver;
• wherein the first electronic switch receives the first digital signal, and accordingly changes an ON/OFF state of the first electronic switch to regulate the transformer receiving the input voltage from the input terminal, thus generating the output voltage and the output current;
• wherein a duration for the ON/OFF state of the first electronic switch is determined by a first instance the control signal changes from negative to positive and a second instance the control signal changes from positive to negative.