Overload detection in a switched mode power supply

A method of controlling a switched mode power supply,

• the method comprising:
• receiving;
• the feedback signal;
• a feedback signal generated by a voltage regulator of the switched mode power supply, the voltage regulator being one of a PID controller, PI controller, and an I controller, operable to generate the feedback signal based on at least one of an output voltage (Vout) and an output current (Iout) of the switched mode power supply;
• determining whether the feedback signal is outside a predetermined range;
• if the feedback signal is outside the predetermined range, determining that the switched mode power supply is in an overload state;
• and
• when an overload state is determined, performing control to place the switched mode power supply in a non-operational state,
• wherein the switched mode power supply includes:
• a switching device, the switched mode power supply being operable to convert an input voltage (Vin) to the output voltage (Vout) by switching the switching device;
• a current limiting circuit operable to determine a current in the switched mode power supply and generate an excess current control signal when the current exceeds a current threshold;
• a controller arranged to receive the feedback signal and the excess current control signal, and operable to control the switching device;
• in a first operational mode when the current determined by the current limiting circuit is below the current threshold, to regulate one of the output voltage and the output current based on the feedback signal;
• and
• in a second operational mode when the current determined by the current limiting circuit exceeds the current threshold, to reduce the current in the switched mode power supply on the basis of the excess current control signal.