Patent ID: 7786714

Claim:
A voltage converter apparatus, the apparatus comprising: a first output controller to control, when in use, a form of an output signal in accordance with a first voltage regulation scheme, the first voltage regulation scheme comprising a pulse width modulation scheme; a second output controller to control, when in use, the form of the output signal in accordance with a second voltage regulation scheme, the second voltage regulation scheme comprising a pulse frequency modulation scheme; a signal analyser to analyze a load current signal associated with the output signal to determine a load current pulse time representing a sum of a rising period of the load current signal and a falling period of the load current signal divided by a period of the pulse width modulation scheme; and a selector coupled to the signal analyser, the selector to switch, when in use, between control of the form of the output signal by the first output controller and the second output controller in response to a relationship between the load current pulse time and a first threshold.