Patent ID: 7486046

Claim:
A power converter, used for converting an external power supply into an output electric parameter, comprising: a voltage regulator, used for regulating the external power supply into the output electric parameter; a booster/bucker module, coupled between a rechargeable electric-energy storing unit and the output electric parameter; a first detection module, used for detecting the presence of the external power supply and sending out a detection result to the voltage regulator; a timing control module (TCM), used for outputting a first timing signal and a second timing signal to the booster/bucker module according to the detection result; and a second detection module, used for detecting the electric-energy status of the rechargeable electric-energy storing unit, sending out an on/off control signal to the timing control module (TCM) and sending out a boost mode signal and a buck mode signal to control the booster/bucker module for boosting or bucking operation; wherein, the output electric parameter is boosted or bucked by the booster/bucker module, and then the electric-energy is stored in the rechargeable electric-energy storing unit; wherein, as the external power supply is present, the detection result controls the voltage regulator to be on duty; while the external power supply is not present, the detection result controls the voltage regulator to be off duty; and wherein, as the rechargeable electric-energy storing unit is fully energized, the on/off control signal commands the TCM to turn off the booster/bucker module.