Patent ID: 7949233

Claim:
A method for controlling a heat-dissipating fan for an electronic component, said method comprising the steps of: a) detecting a temperature of the electronic component, and outputting a first control signal corresponding to the temperature thus detected; b) receiving a load current of the electronic component, and converting the load current into a second control signal; and c) controlling a rotating speed of the heat-dissipating fan with reference to the first control signal and the second control signal; wherein step c) comprises controlling the rotating speed of the heat-dissipating fan with reference to a pulse width of the first control signal and a pulse width of the second control signal; wherein the step of controlling the rotating speed of the heat-dissipating fan with reference to the pulse widths of the first and second control signals in step c) comprises the sub-steps of: (i) determining if the pulse width of one of the first control signal and the second control signal is wider than that of the other one of the first control signal and the second control signal, and (ii) outputting said one of the first control signal and the second control signal with the wider pulse width to serve as a basis for controlling the rotating speed of the heat-dissipating fan.