Converting controller for overcurrent protection

A converting controller, adapted to control a converting circuit and convert an input voltage into an output voltage, wherein, the converting circuit comprising a transistor switch coupled to the input voltage, the converting controller comprising:

• an over current setting unit, coupled to a setting circuit through a setting pin and receiving a first signal of the setting circuit during a first time period to generate an over current setting signal representing an over current value;
• a time setting unit, coupled to the setting circuit through the setting pin and receiving a second signal of the setting circuit during a second time period to generate a time period setting signal representing a time period;
• and
• a controlling unit, receiving the time period setting signal, and a feedback signal representing a state of the converting circuit to accordingly switch the transistor switch, and receiving the over current setting signal and a current detecting signal representing a current value flowing through the transistor switch to accordingly determine whether to turn off the transistor switch to have a current of the transistor switch being maintained within the over current value;
• wherein, the first time period and the second time period are staggered with each other,
• wherein the first signal and the second signal are independent of the output voltage,
• wherein the over current setting unit and the time setting unit are coupled to the setting circuit through the setting pin, and
• wherein the over current setting unit comprises a first timing switch and the controlling unit turns on the first timing switch during the first time period, such that the over current setting unit generates the over current setting signal according to a voltage of the setting pin.